Glossary of geography terms

Glossary of geographical terms with climate definition

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This glossary of geography terms is a list of definitions of words and phrases used in geography and related fields, which describe and identify natural phenomena, geographical locations, spatial dimension and natural resources. Geographical terms are classified according to their functions, such as description, explanation, analysing, evaluating and integrating.

Video Glossary of geography terms

A

absolute humidity: The mass of water vapor in the atmosphere per unit of volume of space.
absolute location: The location of a point on the Earth's surface that can be expressed by a grid reference such as latitude and longitude.
accessibility resource: A naturally occurring landscape feature that facilitates interaction between places.
accessibility: A locational characteristic that permits a place to be reached by the efforts of those at other places.
acid rain: Rain that has become more acidic than normal (a pH below 5.0) as certain oxides present as airborne pollutants are absorbed by the water droplets. The term is often applied generically to all acidic precipitation.
active volcano: A volcano that is currently erupting, or one that has erupted during the last 10,000 years (the Holocene) or during recorded history.
agricultural geography: A subdiscipline of geography which studies the spatial relationships between humans and agriculture and the cultural, political, and environmental processes that lead to parts of the Earth's surface being transformed by humans through primary sector activities into agricultural landscapes.
air mass: A very large body of atmosphere defined by essentially similar horizontal air temperatures. Moisture conditions are also usually similar throughout the mass.
alluvia: Clay, silt, gravel, or similar detrital material deposited by running water.
alluvial soils: Soils deposited through the action of moving water. These soils lack horizons and are usually highly fertile.
altitude: The height of an object in the atmosphere above sea level. Compare elevation.
Antarctic: The region of the Earth that is south of the Antarctic Circle.
Antarctic Circle: The southernmost of the Earth's two polar circles of latitude, south of which the sun appears above the horizon for 24 continuous hours at least once per year (and is therefore visible at midnight) and also appears at least partially below the horizon for 24 continuous hours at least once per year (and is therefore not visible at noon). Its latitude is approximately 66°33?47.1? south of the Equator. Compare Arctic Circle.
anthracite: A hard coal containing little volatile matter.
anthropization: The conversion of open spaces, landscapes, and natural environments by human action.
anticline: A geological fold that has an arch-like convex shape and its oldest beds near its center, often visible at the Earth's surface in exposed rock strata.
antimeridian: The line of longitude exactly 180 degrees east or west of the Prime Meridian, with which it forms a great circle dividing the earth into the Eastern and Western Hemispheres. It is used as the basis for the International Date Line because it mostly passes through the open waters of the Pacific Ocean.
antipodes: A pair of points on the Earth's surface that are diametrically opposite to each other, such that a straight line connecting them would pass through the Earth's center. Such points are as far away from each other as possible, with the great-circle distance between them being approximately 20,000 kilometres (12,000 mi).
archipelago: A collection of islands in a sea.
arête: A sharp, narrow mountain ridge. It often results from the erosive activity of alpine glaciers flowing in adjacent valleys.
arroyo: A deep gully cut by a stream that flows only part of the year; a dry gulch. A term normally used only in desert areas.
Arctic: The region of the Earth that is north of the Arctic Circle.
Arctic Circle: The northernmost of the Earth's two polar circles of latitude, north of which the sun appears above the horizon for 24 continuous hours at least once per year (and is therefore visible at midnight) and also appears at least partially below the horizon for 24 continuous hours at least once per year (and is therefore not visible at noon). Its latitude is approximately 66°33?47.1? north of the Equator. Compare Antarctic Circle.
ash: Fragments less than ¹/₃ centimetre (0.13 in) in diameter of lava or rock blasted into the air by volcanic explosions.
Atlantic Seaboard fall line: The physiographic border between the Piedmont and Atlantic coastal plain regions of eastern North America. The name derives from the river rapids and falls that occur as the water flows from the hard rocks of the higher piedmont onto the softer rocks of the coastal plain.
atlas: A bound collection of maps.
atmosphere: The mixture of gases, aerosols, solid particles, and water vapor that envelops the Earth.
atoll: A ring-shaped coral reef that partially or completely encircles a lagoon.
azimuth: The angle formed between a reference vector (often magnetic north) and a line from the observer to a point of interest projected perpendicularly to the zenith on the same plane as the reference vector. Azimuth is usually measured in degrees and can be determined with a compass.

Maps Glossary of geography terms

B

badlands: An area of irregular topography resulting from extensive wind and water erosion of sedimentary rock.
barrier ridge: Unnavigable steep terrain isolating one terrain from another.
base level: The lowest level to which a stream can erode its bed. The ultimate base level of all streams is, of course, the sea.
basin: See depression.
batholith: A very large body of igneous rock, usually granite, which has been exposed by erosion of the overlying rock.
bay: Part of a sea or lake within a wide or narrow indentation of the shoreline.
beach: A landform along the shoreline of an ocean, sea, lake, or river with a loose surface of sand, gravel, shingle, pebbles, shells, stones or coral.
bearing: The direction or position of an object, or the direction of an object's movement, relative to a fixed point. It is typically measured in degrees and can be determined with a compass, where magnetic north is by convention defined as having a bearing of zero degrees.
bedrock: The solid rock in the Earth's crust that underlies all soil or other loose material; the rock material that breaks down eventually to form soil.
bight: A bend or curve in a coastline, river, or other geographical feature typically indicating a large, open bay. It is shallower than a sound.
biological diversity: A concept recognising the variety of life forms in an area of the Earth and the ecological interdependence of these life forms.
biogeography: The study of the distribution of biological species and ecosystems in geographic space and through geological time.
biosphere: The realm of all living things.
biota: The animal and plant life of a region considered as a total ecological entity.
bituminous: A soft coal that, when heated, yields considerable volatile matter.
blowout: A sandy depression formed when wind erodes into patches of bare sand on otherwise vegetation-stabilized sand dunes at the margins of coastal and arid ecosystems.
bocage: A landscape of mixed woodland and pasture, with fields and winding country lanes sunken between low, narrow ridges and banks surmounted by tall, thick hedgerows, especially as found in rural parts of western Europe.
body of water: Any significant accumulation of water, either natural or artificial, on the surface of the Earth. Bodies of water may hold or contain water, as with lakes and oceans, or they may collect and move water from one place to another, as with rivers, streams, and other waterways.
border: The geographical boundary of a political entity or legal jurisdiction, such as a country, state, or other subnational entity.
break-in-bulk point: A transfer point on a transport route where the mode of transport or type of carrier changes and where large-volume shipments are reduced in size. For example, goods may be unloaded from a ship and transferred to trucks at an ocean port.
built environment: The human-made spaces that provide the setting for human activity, in which people live, work, and recreate on a day-to-day basis.
butte: An isolated hill or mountain with steep or precipitous sides, usually having a smaller summit area than a mesa.

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C

calanque: A narrow, steep-sided valley surrounding an inlet formed in karstic regions along the Mediterranean coast, either by fluvial erosion or the collapse of the roof of a cave that has been subsequently partially submerged by a rise in sea level.
caldera: A large, cauldron-like depression that forms through the subsidence and collapse of a ground surface following the evacuation of an underlying magma chamber.
canal: A navigable artificial water channel, usually built as a conduit for human activity.
canyon: A deep cleft between cliffs or escarpments, or a rift between two mountain peaks, resulting from weathering and the erosive activity of a river over long periods of geologic time. Also called a gorge or spelled cañon.
cape: A large headland or promontory extending into a body of water, usually a sea or ocean.
caprock: A stratum of erosion-resistant sedimentary rock (usually limestone) found in arid areas. Caprock forms the top layer of most mesas and buttes.
cardinal directions: The four primary directions used in cartography and navigation: north (N), south (S), east (E), and west (W). Together they form the primary divisions of the compass rose. They can be further subdivided into the intercardinal directions and secondary-intercardinal directions.
carrying capacity: The number of people that an area can support given the quality of the natural environment and the level of technology of the population.
cartography: The study and practice of making maps and charts. A person who draws or makes maps or charts is called a cartographer.
cartogram: A map in which some thematic mapping variable, such as travel time, population, or gross national product, is substituted for traditional measures of land area or distance such that the geometry or space of the map is distorted in order to convey and emphasize the information of the alternate variable.
cave: Any naturally hollow underground space large enough for a person to enter. A cavern is a solutional cave that is formed in soluble rock with the ability to grow speleothems.
cay: A small, sandy, low-elevation island on the surface of an otherwise submerged coral reef; a type of coral island. Compare atoll.
cenote: A natural pit or sinkhole resulting from the collapse of limestone bedrock which exposes groundwater underneath.
central business district: A centrally located commercial business district in an urban area, typically containing a concentration of office and retail activities.
census-designated place (CDP): A concentration of population identified by the United States Census Bureau for statistical purposes.
channel: 1) A waterway separating two relatively close landmasses; 2) any narrow body of water that connects two larger bodies of water; 3) the deepest part of a shallow body of water, often used as a passageway for large ships. Also called a strait.
chaparral: A dense, impenetrable thicket of shrubs or dwarf trees.
chinook: A warm, dry wind experienced along the eastern side of the Rocky Mountains in the United States and Canada. Most common in winter and spring, it can result in a rise in temperature of 20 °C (68 °F) in a quarter of an hour.
chorography
cinder cone: A steep-sided volcano formed by the explosive eruption of cinders that form around a vent. Cinders are lava fragments about 1 centimetre (0.39 in) in diameter.
circle of latitude: See latitude.
cirque
city: A large human settlement, generally with extensive systems constructed for housing, transportation, sanitation, utilities, and communication.
city-state: A sovereign state or small independent country that usually consists of a single city and its dependent territories.
cliff: Any vertical or nearly vertical rock exposure, usually formed by the processes of weathering and erosion.
climax vegetation: The vegetation that would exist in an area if growth had proceeded undisturbed for an extended period. This would be the "final" collection of plant types that presumably would remain forever, or until the stable conditions were somehow disturbed.
coast
col: The lowest point on a mountain ridge between two peaks. Also called a gap or notch.
colony
commonwealth
compass: An instrument used for navigation and orientation that indicates direction relative to the geographic cardinal directions by measuring the orientation of the Earth's magnetic field with respect to the North Magnetic Pole. Compasses often display markings for angles or degrees, which allow it to show azimuths and bearings, in addition to a compass rose.
compass rose: A figure on a compass, map, nautical chart, or monument used to display the orientation of the four cardinal directions -- North, East, South, and West -- and their intermediate points.
confluence: The place at which two or more streams flow together to form one larger stream.
coniferous: Bearing cones; from the conifer family.
continent: One of several very large, contiguous landmasses into which the Earth's land area is divided, generally by geographical or political convention rather than any strict criteria. Geologically, continents correspond largely to areas of continental crust on continental plates.
continental climate: The type of climate found in the interior of the major continents in the middle, or temperate, latitudes. The climate is characterized by a great seasonal variation in temperatures, four distinct seasons, and a relatively small annual precipitation.
continental divide: The line of high ground that separates the different oceanic drainage basins of a particular continent. The river systems of a continent on opposite sides of a continental divide flow toward different oceans. See drainage divide.
continental shelf
continentality: The quality of being located on a continent.
contour lines: Lines marked on topographic maps to show the shape and elevation of the land. They connect points of equal elevation.
conurbation: An extensive urban area formed when two or more initially separate cities coalesce to form a continuous metropolitan area.
corrasion
core area: The portion of a country that contains its economic, political, intellectual, and cultural focus. It is often the center of creativity and change (see hearth).
coulee: A dry canyon eroded by Pleistocene floods that cut into the lava beds of the Columbia Plateau in the western United States.
couloir: A narrow gully with a steep gradient in a mountainous terrain, often enclosed by sheer cliffs and filled with snow or ice even during the summer months.
country: A region identified as a distinct national entity in political geography. Compare state.
county
course
crater: Any large, roughly circular depression, pit, or hole in the Earth's surface. Craters can be classified into different types based on their ultimate causes; see impact crater, volcanic crater, and pit crater.
crater lake
crop-lien system: A farm financing scheme whereby money is loaned at the beginning of a growing season to pay for farming operations, with the subsequent harvest used as collateral for the loan.
crust: The thin shell of solid material that is the Earth's outermost layer and the outermost component of the lithosphere. The Earth's crust is generally divided into two distinct types, oceanic crust and continental crust, both of which "float" on top of the mantle.
cryosphere: The ice and snow on the Earth's surface, such as glaciers; sea, lake, and river ice; snow; and permafrost.
cryoturbation: The mixing of materials from various horizons of the soil down to the bedrock due to freezing and thawing. Also called frost churning.
cuesta: A long low ridge with a steep scarp slope and gentle backslope (dip slope).
cultural geography: A branch of human geography which studies the patterns and interactions of human culture in relation to the natural environment and the human organization of space.
culture: The accumulated habits, attitudes, and beliefs of a group of people that define for them their general behavior and way of life; the total set of learned activities of a people.
culture hearth: The area from which the culture of a group diffused. See hearth.
cut bank
Cyclopean stairs: A term referring to the longitudinal profile of some glaciated valleys which have been eroded into a series of consecutive hanging valleys resembling stairs.

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D

dale: Another name for a valley.
de facto segregation: The spatial and social separation of populations that occurs without legal sanction.
de jure segregation: The spatial and social separation of populations that occurs because of legal measures.
deciduous forest: A forest in which the trees lose their leaves each year.
degree: A unit of angular measure. A circle is divided into 360 degrees, represented by the º symbol. Degrees are used to divide the roughly spherical shape of the Earth for geographic and cartographic purposes.
degree day: Deviation of one-degree temperature for one day from an arbitrary standard, usually the long-term average temperature for a place.
dell
delta: A landform at the mouth of a river where the main stem splits up into several distributaries. It is formed from the deposition of the sediment carried by the river as the flow leaves the mouth of the river. Compare estuary.
demography: The systematic analysis of population.
depression: Any landform that is sunken or depressed below the surrounding area. Depressions include an enormous variety of landforms and can form by a number of different mechanisms, including erosion, ground collapse, tectonic activity, volcanism, and meteorite impacts.
desert: An arid, barren area of land where little precipitation occurs and living conditions are consequently hostile for plant and animal life. Deserts are characterized by exposure of the unprotected ground surface to processes of denudation as well as large variations in temperature between night and day. They are often classified by the amount of precipitation they receive, by their average temperature, by the causes of their desertification, or by their geographical location.
digital elevation model (DEM)
dike: See levee.
distributary
district
dome: A steep-sided mound that forms when very viscous lava is extruded from a volcanic vent. An uplifted area of sedimentary rocks with a downward dip in all directions; often caused by molten rock material pushing upward from below. The sediments have often eroded away, exposing the rocks that resulted when the molten material cooled.
dormant volcano: An active volcano that is in repose (quiescence) but is expected to erupt in the future.
drainage basin: Any area of land where precipitation collects and drains into a common outlet, such as a river, lake, ocean, or any other body of water. The drainage basin includes all of the surface water from precipitation runoff and snowmelt, as well as all of the groundwater beneath the Earth's surface. Each drainage basin is separated topographically from adjacent basins by a drainage divide. Also called a catchment area, drainage area, river basin, water basin, or watershed.
drainage divide: The topographical barrier that separates neighboring drainage basins. Divides are often, though not always, located along conspicuous elevated ridges or mountain ranges. Also called a water divide, ridgeline, watershed, or water parting.
draw: A terrain feature formed by two parallel ridges or spurs with low ground in between them. Also called a re-entrant.
drumlin: An elongated hill in the shape of an inverted spoon or half-buried egg which is formed by glacial ice acting on underlying unconsolidated till or ground moraine.
dry farming: A type of farming practiced in semi-arid or dry grassland areas without irrigation using such approaches as fallowing, maintaining a finely broken surface, and growing drought-tolerant crops.
dry point
dune: A hill of loose sand built by the movements and erosional and depositional processes of wind or water, often occurring in deserts and coastal areas.

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E

Eastern Hemisphere: The half sphere of the Earth that is east of the Prime Meridian and west of the antimeridian. It is opposite the Western Hemisphere.
economic geography: A subdiscipline of geography which studies the location, distribution, and spatial organization of economic activities across the world.
economies of agglomeration: The economic advantages that accrue to an activity by locating close to other activities; benefits that follow from complementarity or shared public services.
edgelands: The transitional areas of "fringe" space at the boundaries of a country, city, or other artificial geographical entity, often distinguished by a partly manmade, partly natural landscape that is in the earliest stages of human management and organization. Compare hinterland.
elevation: The height of a point on the Earth's surface with respect to sea level. Compare altitude.
emergent coastline: A shoreline resulting from a rise in land surface elevation relative to sea level.
enclave: A tract or territory completely surrounded by and enclosed within the territory of one other state, country or other political entity. Unlike enclaves, exclaves can be surrounded by more than one other state.
endorheic basin: A closed drainage basin that allows little or no outflow to other external bodies of water but converges instead into internal lakes or swamps which equilibrate through evaporation.
Equator: The imaginary circle around the Earth halfway between the geographic poles which is assigned a latitude of zero degrees and is therefore used as a reference point for all other lines of latitude. It is the largest circumference of the Earth.
erratic: A boulder that has been carried from its source by a glacier and deposited as the glacier melted. Thus, the boulder is often of a different rock type from surrounding types.
escarpment: A long cliff or steep slope separating two comparatively level or more gently sloping surfaces and resulting from erosion or faulting.
esker: A long, winding ridge of stratified sand and gravel, usually occurring in glaciated or formerly glaciated areas. Also called an os or spelled eskar or eschar.
estuary: The broad lower course of a river where it enters the ocean and is affected by the tides. Compare delta.
evapotranspiration: The process by which water is lost from an area through the combined effects of evaporation from the ground surface and transpiration from vegetation.
exclave: A portion of a state or territory that is geographically separated from the main part by surrounding foreign territory of one or more other states or political entities. Many exclaves are also enclaves.
exotic stream: A stream found in an area that is too dry to have spawned such a flow. The flow originates in some moister section.
extinct volcano: A volcano that is not expected to erupt again.
exurban: An adjective describing a region or district that lies outside a city and usually beyond its suburbs; a place of this type is called an exurb. Compare rural.

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F

fall line: A geomorphologic unconformity between an upland region of relatively hard crystalline basement rock and a coastal plain of softer sedimentary rock.
fallow: Agricultural land that is plowed or tilled but left unseeded during a growing season. Fallowing is usually done to conserve moisture.
fault: A fracture in the Earth's crust accompanied by a displacement of one side of the fracture.
fault-block mountain: A mountain mass created by either the uplift of land between faults or the subsidence of land outside the faults.
fault zone: An area of numerous fractures in the Earth's crust along which movement has occurred. The movement may be in any direction and involve material on either or both sides of the fractures.
federation: A form of government in which powers and functions are divided between a central government and a number of political subdivisions that have a significant degree of political autonomy.
fen
field: A quantity that can be theoretically assigned to any point of space, such as temperature, soil moisture, or population density. Both scalar and vector fields are found in geographic applications, although the former is more common. Also called a spatially dependent variable.
fish ladder: A series of shallow steps down which water is allowed to flow; designed to permit salmon to circumvent artificial barriers such as power dams as the salmon swim upstream to spawn.
fjord: A long, narrow inlet with steep sides or cliffs, created by glacial erosion.
floodplain: A broad, flat area of land adjacent to a stream or river which is leveled by annual flooding and by the lateral and downstream movement of meanders.
focality: The characteristic of a place that follows from its interconnections with more than one other place. When interaction within a region comes together at a place (i.e., when the movement focuses on that location), the place is said to possess "focality".
forest: Any large area dominated by communities of trees.
functional diversity: The characteristic of a place where a variety of different activities (economic, political, or social, for example) occurs; most often associated with urban places.

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G

gazetteer: A geographical dictionary or directory used in conjunction with a map or atlas and containing information concerning the geographical make-up, social statistics, and physical features of a country, region, or continent.
geodesy
geoid
geoinformatics: The science and technology which develops and uses information science infrastructures to address problems and analyze data within geography, cartography, geoscience, and related branches of science and engineering.
geographic information science (GIS): The scientific study of data structures and computational techniques for capturing, representing, processing, and analyzing geographic information.
geographic information system (GIS): Any system of computer software tools designed to allow users to record, store, manipulate, analyze, manage, and present large sets of spatial or geographic data.
Geographic Names Information System (GNIS): A digital public-domain database developed by the U.S. Geological Survey and the U.S. Board on Geographic Names which contains name and locative information about more than two million physical and cultural features located throughout the United States and its territories. Each feature recorded in the database receives a unique feature record identifier called a GNIS identifier.
geography: The scientific study of the lands, features, inhabitants, and phenomena of Earth.
geolocation: The identification or estimation of the real-world geographic location of an object involving the generation of a set of geographic coordinates in order to determine a more meaningful description of location, such as a street address.
geomatics
geomorphology: The study of the arrangement and form of the Earth's crust and of the relationship between these physical features and the geologic structures beneath.
geosphere: The collective non-living parts of the Earth: the lithosphere, the atmosphere, the cryosphere, and the hydrosphere.
geostatistics
ghetto: Originally, the section of a European city to which Jews were restricted. Today, this is commonly defined as a section of a city occupied by members of a minority group who live there because of social restrictions on their residential choice.
glacial till: The mass of rocks and finely ground material carried by a glacier and deposited when the ice melted. This creates an unstratified material of varying composition.
glaciation: Having been covered with a glacier or subject to glacial epochs.
glacier: A thick mass of ice resulting from compacted snow that forms when more snow accumulates than melts annually.
Global Positioning System (GPS)
globe: A true-to-scale map of the Earth that duplicates its round shape and correctly represents areas, relative sizes, and shapes of physical features, distances, and directions.
graben
great circle
great-circle distance: A route which follows a line defined by the intersection of the Earth's surface with an imaginary plane passing through the Earth's center. It is the shortest route between two places on the Earth's surface. Also called orthodromic distance.
grid: A pattern of lines on a chart or map, such as those representing latitude and longitude, which helps determine absolute location.
groundwater
growing season: The period from the average date of the last frost (in the United States, this occurs in the spring) to the first frost in the fall.
groyne: A rigid hydraulic structure built from an ocean shore (in coastal engineering) or from a bank (in rivers) that interrupts water flow and limits the movement of sediment.
gulch: A deep, V-shaped valley often containing a small stream or a dry stream bed and formed by erosion, especially one in xeric areas.
gulf: A large arm of an ocean or sea that lies within a curved coastline; similar to a bay but usually larger.
gully
guyot

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H

hamlet: A small human settlement, variably defined as one the size of a town, village, or parish or as a smaller subdivision of or satellite entity to a larger settlement.
hanging valley
harmonic tremor: Continuous rhythmic earthquakes in the Earth's upper lithosphere that can be detected by seismographs. Harmonic tremors often precede or accompany volcanic eruptions.
heading
headland: A high coastal promontory that extends out into a body of water, often surrounded by steep cliffs; a very large headland is often called a cape.
hearth: The source area of any innovation. The source area from which an idea, crop, artifact, or good is diffused to other areas.
heath: A shrubland habitat found mainly on free-draining, infertile, acidic soils and characterized by open, low-growing, woody vegetation. Also called heathland.
hedgerow
hemisphere: Half of the Earth, usually conceived as resulting from the division of the globe into two equal parts of either north and south or east and west.
highland
hill: Any landform that extends above the surrounding terrain; a hill is generally considered less steep than a mountain.
hillock: A small hill. Also called a knoll.
hinterland: An area tributary to a place and linked to that place through lines of exchange or interaction.
historical geography
hogback
horizon
hotspot: An area in the middle of a lithospheric plate where magma rises from the mantle and erupts at the Earth's surface. Volcanoes sometimes occur above a hotspot.
human geography: The branch of geography that studies humans and their communities, cultures, economies, and interactions with the environment by examining their relations with and across space and place. Along with physical geography, it is one of the two major subfields of geography.
hummock: A small knoll or mound, typically less than 15 metres (49 ft) in height and situated above an otherwise level ground surface.
humus: Partially decomposed organic soil material.
hydrography: The study of the surface waters of the Earth.
hydrosphere: The totality of the liquid water that covers 71 percent of the Earth's surface as oceans, lakes, rivers, and streams. The hydrosphere also includes groundwater, water that circulates below the Earth's surface in the upper part of the lithosphere.

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I

ice age: A time of widespread glaciation, such as the Pleistocene Epoch.
iceberg: A large chunk of freshwater ice which has broken off a larger body of ice (such as a glacier or ice shelf) and is floating freely in open water.
igneous rock: Rock formed when molten (melted) materials harden.
impact crater
Inertia Costs of Location: Costs borne by an activity because it remains located at its original site, even though the distributions of supply and demand have changed.
inlet: An indentation of a shoreline, usually long and narrow, which often leads to an enclosed body of saltwater, such as a sound, bay, lagoon, or marsh.
inselberg: An isolated rocky hill, knob, ridge, or small mountain that rises abruptly from a virtually level surrounding plain. Also called a monadnock. Compare mogote.
insular: Either of an island, or suggestive of the isolated condition of an island.
integrated geography: The branch of geography that describes and explains the spatial aspects of interactions between human individuals or societies and their natural environment. Also called integrative geography, environmental geography, or human-environment geography.
intercardinal directions
interfluve: A narrow, elongated, and plateau-like or ridge-like landform between two valleys, or an area of higher ground between two rivers in the same drainage basin.
intermediate directions: See intercardinal directions.
International Date Line: A line of longitude generally 180 degrees east and west of the Prime Meridian. The date is one day earlier to the east of the line.
international waters
intervening opportunity: The existence of a closer, less expensive opportunity for obtaining a good or service, or for a migration destination. Such opportunities lessen the attractiveness of more distant places.
Intracoastal Waterway System: A U.S. waterway channel, maintained through dredging and sheltered for the most part by a series of linear offshore islands, that extends from New York City to the southern tip of Florida and from Brownsville, Texas to the eastern end of Florida's panhandle.
inverted river delta
island: Any piece of sub-continental land that is entirely surrounded by water.
islet: A very small island.
isohyet: A line on a map connecting points that receive equal precipitation.
isthmus: A narrow piece of land connecting two larger land areas across an expanse of water by which they are otherwise separated.

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J

jurisdiction: The right and power to apply the law; the territorial range of hills between mountains.
jhum cultivation: Clear-cutting and/or setting fire to an area of land so it can be used for farm cultivation. Also called jhoom cultivation or slash-and-burn agriculture.
jungle: An area covered with dense vegetation dominated by trees, often tropical.

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K

kame: An irregularly shaped hill or mound composed of sand, gravel, and glacial till which accumulates in a depression on a retreating glacier and is subsequently deposited on the land surface with further melting of the glacier. Kames are often associated with kettles.
karst: An area possessing surface topography resulting from the underground solution of subsurface limestone or dolomite.
kettle: A shallow, sediment-filled body of water formed by blocks of ice calving from a retreating glacier, or by draining floodwaters. Also called a kettle hole or pothole.
knoll: See hillock.

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L

lacustrine plain: A nearly level land area that was formed as a lakebed.
lagoon: A small area of water connected to the ocean but otherwise blockaded by one or more islands.
lahar: See mudflow.
lake: A body of water localized in a basin and surrounded entirely by land. Lakes are often defined as separate from any river or stream that serves to feed or drain them.
land bridge
landform: A natural feature of the solid surface of the Earth. A combined set of landforms makes up the terrain of a given area, and their arrangement in a landscape is known as topography.
landmark: Any natural or artificial feature that is recognizable enough to be used for navigation; a feature that stands out enough from its environment to be visible across long distances.
landmass: Any large contiguous area of land surrounded by ocean. Compare continent.
lateral blast: A sideways-directed explosion from the side or summit of a volcano.
latitude: A measure of distance north or south of the Equator. One degree of latitude equals approximately 110 kilometers (68 mi). Lines of latitude, also called circles of latitude, are the imaginary lines that cross the surface of the Earth in an east-west direction (parallel to the Equator) and measure how far north or south of the Equator a place is located.
lava: The term used for magma once it has erupted onto the Earth's surface.
leaching: A process of soil nutrient removal through the erosive movement and chemical action of water.
leeward: The side of a landmass sheltered from the wind. It is the opposite of windward.
legend: A key for understanding the meaning of the symbols or pictures in a map.
LEDC: An acronym for Less Economically Developed Country.
levee: An elongated naturally occurring ridge or an artificially constructed wall or barrier which regulates water levels in areas prone to flooding. It is usually earthen and often parallel to the course of a river or a coastline. Also called a dike, embankment, floodbank, or stopbank.
life-cycle stage: A period of uneven length in which the relative dependence of an individual on others helps define a complex of basic social relations that remains relatively consistent throughout the period.
lignite: A low-grade brownish coal of relatively poor heat-generating capacity.
lithosphere: The Earth's hard, outermost shell. It comprises the crust and the upper part of the mantle. It is divided into a mosaic of 16 major slabs or plates, which are known as lithospheric plates or tectonic plates.
lithospheric plates: A series of rigid slabs (16 major ones at present) that make up the Earth's outer shell. These plates float on top of a softer, more plastic layer in the Earth's mantle. Also called tectonic plates.
location: A particular point or place in physical space. Compare absolute location.
loess: A soil made up of small particles that were transported by the wind to their present location.
longitude: A measure of distance east or west of a line drawn between the North and South Poles and passing through the Royal Observatory at Greenwich, England. Lines of longitude, also called meridians, are the imaginary lines that cross the surface of the Earth in a north-south direction (parallel to the Prime Meridian) and measure how far east or west of the Prime Meridian a place is located.
lowland

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M

magma: Molten rock containing liquids, crystals, and dissolved gases that forms within the upper part of the Earth's mantle and crust. When erupted onto the Earth's surface, it is called lava.
main stem
mainland
mantle: A zone in the Earth's interior between the crust and the core that is 2,900 kilometers (1,800 mi) thick. The lithosphere is composed of the topmost 65-70 kilometres (40-43 mi) of the mantle and the crust.
map: A picture of a place that is usually drawn to scale on a flat surface.
map projection: A systematic transformation of the latitudes and longitudes of locations from the surface of a three-dimensional shape, such as a sphere or an ellipsoid, into locations on a two-dimensional plane. Maps of locations on the Earth require map projections to represent features in a convenient format that is easy to view and interpret, though all map projections necessarily distort the true properties of the Earth's surface to some degree.
maritime climate: A climate strongly influenced by an oceanic environment, typically found on islands and the windward shores of continents. It is characterized by small daily and yearly temperature variation and high relative humidity.
marsh: A wetland dominated by herbaceous rather than woody plant species and often found at the edges of lakes and streams, where it forms a transition between the aquatic and terrestrial ecosystems.
Mason-Dixon line
massif: A section of the Earth's crust which is demarcated by faults or flexures and tends to retain its internal structure while being displaced as a whole; a single large mountain mass or compact group of connected mountains forming an independent portion of a mountain range.
meander
MEDC: An acronym for More Economically Developed Country.
Mediterranean climate: Any climate characterized by moist, mild winters and hot, dry summers.
megalopolis: A chain of roughly adjacent metropolitan areas which have merged into a very large and heavily populated urban complex. See conurbation and metropolitan coalescence.
megaregion
meridian: See longitude.
mesa: An isolated, relatively flat-topped natural elevation, usually more extensive than a butte and less extensive than a plateau.
metamorphic rock: Rock that has been physically altered by heat and/or pressure.
metes and bounds: A system of land survey that defines land parcels according to visible natural landscape features and distance. The resultant field pattern is usually very irregular in shape.
metropolis: A large city or conurbation which is considered a significant economic, political, or cultural center for a country or geographic region and/or an important hub for regional or international connections and communications.
metropolitan area
metropolitan coalescence: The merging of the urbanized areas of separate metropolitan regions; a megalopolis is an example of this process.
mogote: An isolated, rounded, steep-sided hill composed of either limestone, marble, or dolomite and surrounded by nearly flat alluvial plains, especially as found in tropical regions.
monadnock: See inselberg.
moor: An upland habitat in the montane grasslands and shrublands and temperate grasslands, savannas, and shrublands biomes characterized by low-growing vegetation on acidic soils and generally referring to uncultivated hills but also including low-lying wetlands. Also called moorland.
moraine: The rocks and soil carried and deposited by a glacier. An "end moraine," either a ridge or low hill running perpendicular to the direction of ice movement, forms at the end of a glacier when the ice is melting.
mound: Any heaped pile of earth, gravel, sand, rocks, or debris, typically with a rounded top and of topographically higher elevation than its immediate surroundings.
mountain: A large landform that rises prominently above the surrounding land in a limited area, usually in the form of a rocky peak with great vertical relief; a mountain is generally considered steeper than a hill. Mountains are formed by volcanic or tectonic forces and erode slowly through the actions of rivers, glaciers, and weathering. Most exist within extensive mountain ranges.
mountain range: A series of neighboring mountains or hills, often closely arranged in a line and connected by high ground. Individual mountains within the same mountain range are usually the result of the same orogeny, and often (though not always) share a common form, alignment, and geology.
mouth: The place where a river or stream flows into another body of water, such as a lake or another river but especially a sea or ocean. Deltas and estuaries occur near the mouths of rivers.
mudflow: A flowing mixture of water and debris (intermediate between a volcanic avalanche and a water flood) that forms on the slopes of a volcano. Sometimes called a debris flow or lahar, a term from Indonesia where volcanic mudflows are a major hazard.
multilingual: The ability to use more than one language when speaking or writing. This term often refers to the presence of more than two populations of significant size within a single political unit, each group speaking a different language as their primary language.

N

nadir
nation: A stable community of people formed on the basis of a common geographic territory, language, economy, ethnicity, or psychological make-up as manifested in a common culture.
national mapping agency
natural landscape: The original landscape that exists before it is acted upon by humans. Compare cultural landscape.
nodal region: A region characterized by a set of places connected to another place by lines of communication or movement.
North Geographic Pole
North Magnetic Pole
Northern Hemisphere: The half sphere of the Earth that is north of the Equator. It is opposite the Southern Hemisphere.

O

oasis
ocean: A vast, contiguous body of salt water covering more than 70% of the Earth's surface area and surrounding the continental landmasses, or a portion of this larger body of water that is divided and distinguished from the other portions, each of which is called an ocean, by the presence of the landmasses.
open range: A cattle- or sheep-ranching area characterized by a general absence of fences and in which livestock are allowed to roam freely.
ordinal directions: See intercardinal directions.
orographic rainfall: Precipitation that results when moist air is lifted over a topographic barrier, such as a mountain range.
outwash: Rocky and sandy surface material deposited by melted water that flows from a glacier.
overburden: Material covering a mineral seam or bed that must be removed before the mineral can be removed in strip mining.
oxbow: 1) A wide U-shaped meander in a river or stream; 2) the lake formed when a meander is cut off from the main stem of the river, creating a separate body of water.

P

palisade: 1) A wall of wooden stakes used as a defensive barrier; 2) a line of bold cliffs, especially one showing basaltic columns.
panhandle: See salient.
parish
permafrost: A permanently frozen layer of soil; permanently frozen ground at high latitude and high elevation.
peninsula
photogrammetry
physical geography: The branch of geography that studies processes and patterns in the natural environment, such as the atmosphere, hydrosphere, geosphere, and biosphere, as opposed to the cultural or built environment. Along with human geography, it is one of the two major subfields of geography. Also called physiography or geosystems.
physiographic region: A portion of the Earth's surface with a common topography and common morphology.
physiography: Another name for physical geography.
piedmont: Lying or formed at the base of mountains; in the United States, a broad area in the southern states extending from the Blue Ridge Mountains to the Atlantic coastal plain.
pit crater
place identity
plain: Any broad, flat expanse of land that generally does not show significant variation in elevation.
plate tectonics: A geologic theory that the bending (folding) and breaking (faulting) of the solid surface of the Earth results from the slow movement of large sections of that surface called plates.
plateau: An area of highland consisting of relatively flat terrain that is significantly higher than the surrounding landscape, often with one or more sides with steep slopes. Also sometimes called a high plain or tableland.
platted land: Land that has been divided into surveyed lots.
plural society: A situation in which two or more culture groups occupy the same territory but maintain their separate cultural identities.
polar circle: Either of the two circles of latitude enclosing the Earth's polar regions: the Arctic Circle in the northern hemisphere and the Antarctic Circle in the southern hemisphere.
polar region: Either of the two high-latitude regions surrounding the Earth's geographical poles (the North and South Poles), which are characterized by frigid climates and extensive polar ice caps. The polar region of the northern hemisphere is often simply called the Arctic and that of the southern hemisphere is called the Antarctic.
pole of inaccessibility
political geography: The study of both the spatially uneven outcomes of political processes and the ways in which political processes are themselves affected by spatial structures. A subdiscipline of human geography, its primary concerns can be summarized as the relationships between people, state, and territory.
polynodal: Many-centered.
pond: A natural or artificial body of standing water that is usually smaller than a lake.
populated place: A place or area with clustered or scattered buildings and a permanent human population (a city, settlement, town, or village) that is referenced with geographic coordinates.
post-industrial: An economy that gains its basic character from economic activities developed primarily after manufacturing grew to predominance. Most notable would be quaternary economic patterns.
pothole
Precambrian rock: The oldest rocks, generally more than 600 million years old.
prevailing winds: The direction from which winds most frequently blow at a specific geographic location.
primary sector: That portion of a region's economy devoted to the extraction of basic materials (e.g., mining, lumbering, agriculture).
Prime Meridian: The imaginary line running from north to south through the Royal Observatory in Greenwich, England which is assigned a longitude of 0 degrees and is therefore used as the reference point for all other lines of longitude.
promontory
province
psychogeography
pueblo: A type of Indian village constructed by some tribes in the southwestern United States. A large community dwelling, divided into many rooms, up to five stories high, and usually made of adobe. This is also a Spanish word for town or village.

Q

quaternary sector: That portion of a region's economy devoted to informational and idea-generating activities (e.g., basic research, universities and colleges, and news media).
quarry: A place from which stone, rock, sand, gravel, slate, or aggregate is excavated from the ground. Also sometimes called an open-pit mine.

R

rail gauge: The distance between the two rails of a railroad.
rainforest
rainshadow: An area of diminished precipitation on the lee (downwind) side of a mountain or mountain range.
region: An area having some characteristic or characteristics that distinguish it from other areas; a territory that is of interest to people, for which one or more distinctive traits are used as the basis for its identity.
relief: See terrain.
relief map: See topographic map.
remote sensing: The gathering of information by the use of electronic or other sensing devices in manmade satellites.
reservoir: An artificial lake or an artificially enlarged natural lake that is used to store water. Reservoirs are often created by the construction of a dam or lock in a natural drainage basin. Also called an impoundment.
resource: Anything that is both naturally occurring and of use to humans.
retroreflector
ridge: An elongated raised landform which forms a continuous elevated crest for some distance, such as a chain of hills or mountains. The line formed by the highest points, with only lower terrain immediately to either side, is called the ridgeline.
rift valley
riparian rights: The rights of water use possessed by a person owning land containing or bordering a watercourse or lake.
ria: A drowned river valley that remains open to the sea.
river: A natural watercourse, usually freshwater, that flows towards an ocean, sea, lake, another river, or in some cases into the ground.
riverine: Located on or inhabiting the banks or the area adjacent to a river or lake.
rural: An adjective describing any geographic area located outside areas of significant human population such as towns and cities; all population, housing, and territory not included within an urban area is said to be rural. Rural areas are typified by low population densities, very small settlements, and expansive areas of agricultural land or wilderness.

S

saddle
salient: Any narrow, elongated protrusion of a larger territory, either physical or political, such as a state. Also called a panhandle, chimney (if protruding northward), or bootheel (if protruding southward).
salt pan
scale: The relationship between a linear measurement on a map and the distance it represents on the Earth's surface.
scarp: A steep cliff or steep slope, formed either because of faulting or by the erosion of inclined rock strata. Also called an escarpment.
sea: 1) Any large body of saltwater surrounded in whole or in part by land; 2) any large subdivision of the World Ocean. "The sea" is the colloquial term for the entire interconnected system of salty bodies of water, including oceans, that covers the Earth.
sea level: The average level of the surface of one or more of Earth's oceans from which heights such as elevation and altitude are commonly measured. Often called mean sea level (MSL), it is a type of standardized geodetic vertical datum that is used in numerous applications, including surveying, cartography, and navigation. Mean sea level is commonly defined as the midpoint between the mean low and mean high tides at a particular location.
seamount: A mountain (often a volcano) rising from the ocean floor whose summit does not reach the water's surface and which is therefore entirely submerged and not an island or islet.
second home: A seasonally occupied dwelling that is not the primary residence of the owner. Such residences are usually found in areas with substantial opportunities for recreation or tourist activity.
secondary-intercardinal directions
secondary sector: That portion of a region's economy devoted to the processing of basic materials extracted by the primary sector.
sedimentary rock: Rock formed by the hardening of material deposited in some process; most commonly sandstone, shale, and limestone.
seismograph: A scientific instrument that detects and records vibrations (seismic waves) produced by earthquakes.
settlement: Any place where people live and form communities. Also called a locality or populated place.
shield: A broad area of very old rocks above sea level that is usually characterized by thin, poor soils and low population densities.
shield volcano: A volcano that resembles an inverted warrior's shield. It has long gentle slopes produced by multiple eruptions of fluid lava flows.
shoal
shore: The fringe of land at the edge of a large body of water, such as an ocean, sea, or lake. Also called a shoreline. Compare coast.
sinkhole: A crater formed when the roof of a cavern collapses, usually found in areas of limestone rock.
site: The features of a place related to the immediate environment on which the place is located (e.g., terrain, soil, subsurface, geology, groundwater).
situation: The features of a place related to its location relative to other places (e.g., accessibility, hinterland quality).
smog: A mixture of particulate matter and chemical pollutants in the lower atmosphere, usually over urban areas.
Standard Metropolitan Statistical Area (SMSA): A statistical unit of one or more counties that focus on one or more central cities larger than a specified size, or with a total population larger than a specified size. This is a reflection of urbanization.
snowline: The lowest elevation at which snow remains from year to year and does not melt during the summer.
soil horizon: A distinct layer of soil encountered in vertical section.
solubility: The degree to which a substance can be dissolved in another substance; in a geographical context, the characteristic of soil minerals that leads them to be carried away in solution by water (see leaching).
sound
South Geographic Pole
South Magnetic Pole
Southern Hemisphere: The half sphere of the Earth that is south of the Equator. It is opposite the Northern Hemisphere.
space economy: The locational pattern of economic activities and their interconnecting linkages.
spatial citizenship
spatial complementarity: The occurrence of location pairing such that items demanded by one place can be supplied by another.
spatial interaction: Movement between locationally separate places.
spatial reference system (SRS): A coordinate-based local, regional, or global system used to locate geographical entities and which defines a specific map projection as well as transformations between different systems.
spreading ridges: Places on the ocean floor where lithospheric plates separate and magma erupts. About 80 percent of the Earth's volcanic activity occurs on the ocean floor.
spring: Any location where water naturally emerges from an underground aquifer to the Earth's surface.
spur: A lateral ridge or other salient landform protruding from the side of a hill, mountain, or the main crest of a ridge and typically surrounded on at least three sides by steep hillsides.
stack: A coastal geological landform consisting of a steep and often vertical column or columns of rock in the sea formed by erosion by wave action. Also called a sea stack.
state: A compulsory political organization with a centralized government that maintains a monopoly of the legitimate use of force within a certain geographical territory. See country.
steppe: An ecoregion in the montane grasslands and shrublands and temperate grasslands, savannas, and shrublands biomes characterized by grassland plains without trees apart from those near rivers and lakes.
strait: See channel.
stratovolcano: A steep-sided volcano built by lava flows and tephra deposits. Also called a composite volcano.
stream: A natural body of water in which surface water flows between the banks of a channel. Long, large streams are usually called rivers.
subduction zone: The place where two lithospheric plates come together, one riding over the other. Most volcanoes on land occur parallel to and inland from the boundary between the two plates.
suburban
summit
surveying: The technique, profession, and science of determining the terrestrial or three-dimensional positions of points on the surface of the Earth and the distances and angles between them. These points are often used to draw maps and establish boundaries for property ownership, construction projects, and other purposes required by government or civil law.
swale
swamp: A forested wetland, often occurring along a large river or on the shores of a large lake.
syrt: A denudational highland or elevated flatland in Russia and Central Asia; a kind of dissected plateau.

T

taiga: A moist subarctic coniferous forest that begins where the tundra ends and is dominated by spruces and firs.
tarn
temperature inversion: An increase in temperature with height above the Earth's surface, a reversal of the normal pattern.
tephra: Solid material of all sizes explosively ejected from a volcano into the atmosphere.
terrain: The vertical and horizontal dimensions of a land surface, usually as expressed in terms of elevation, slope, and orientation of geographical features. Also called topographical relief or simply relief.
territorial waters: 1) A concept of the Law of the Sea defined as a belt of coastal waters extending at most 12 nautical miles (22 km) from the designated baseline (usually defined as the mean low-water line) for a coastal state and regarded as the sovereign territory of the state; 2) any area of water over which a state has legal jurisdiction, including internal waters, the exclusive economic zone, and potentially others.
territory: A specific area or portion of the Earth's surface; similar to though distinct from a region.
tertiary sector: That portion of a region's economy devoted to service activities (e.g., retail and wholesale operations, transportation, insurance).
thalweg: The line of lowest elevation within a valley or watercourse. Thalwegs often acquire special significance in political geography because disputed borders along rivers are often defined as the river's thalweg.
tide: The periodic rise and fall of sea levels caused by the combined effects of the gravitational forces exerted by the Moon and the Sun and the Earth's rotation.
till: See glacial till.
time distance: A time measure of how far apart places are (how long does it take to travel from place A to place B?). This may be contrasted with other distance metrics such as geographic distance (how far is it?) and cost-distance (how much will it cost to get there?).
time geography
time zone: A region of the globe that observes a uniform standard time for legal, commercial, and social purposes.
topographic map: A map that uses contour lines to represent the three-dimensional features of a landscape on a two-dimensional surface. Also called a relief map.
topographical relief: See terrain.
topographic isolation
topographic prominence: A measure of the independence of a mountain or hill defined as the vertical distance between its summit and the lowest contour line encircling it but containing no higher summit within it or, equivalently, the difference between the elevation of the summit and the elevation of the key col. Mountains with high prominence tend to be the highest points in their vicinity. Also called autonomous height, relative height, or shoulder drop.
topography: The physical features of a place, or the study and depiction of physical features, including terrain relief.
toponymy: The study of place names (known as toponyms), their origins, meanings, use, and typology.
tor
town: A medium-sized human settlement that is generally larger than a village but smaller than a city, though the criteria for distinguishing a town vary considerably in different parts of the world.
township and range: The rectangular system of land subdivision of much of the agriculturally settled United States west of the Appalachian Mountains established by the Land Ordinance of 1785.
transferability: The extent to which a good or service can be moved from one location to another; the relative capacity for spatial interaction.
transhumance: The seasonal movement of people and animals in search of pasture. Commonly, winters are spent in snow-free lowlands and summers in the cooler uplands.
tree line: Either the latitudinal or the elevational limit of normal tree growth. Beyond this limit, closer to the poles or at higher or lower elevations, climatic conditions are too severe for such growth.
tributary: A stream or river that flows into a larger stream or main stem or a lake, rather than directly into a sea or ocean. Also called an affluent. Compare distributary.
Tropic of Cancer: The northernmost circle of latitude on the Earth at which the Sun appears directly overhead at its culmination, which lies approximately 23.4 degrees north of the Equator. Its southern equivalent is the Tropic of Capricorn.
Tropic of Capricorn: The southernmost circle of latitude on the Earth at which the Sun appears directly overhead at its culmination, which lies approximately 23.4 degrees south of the Equator. Its northern equivalent is the Tropic of Cancer.
tropics: The region of the Earth's surface surrounding the Equator and bounded by the Tropic of Cancer (23.4° N latitude) and the Tropic of Capricorn (23.4° S latitude). It is characterized by high annual precipitation and the absence of any significant seasonal variation in temperature. The term is often used to describe any area possessing what is considered a hot, humid climate. Also called the tropical zone or torrid zone.
tundra: A treeless plain characteristic of the arctic and subarctic regions.

U

underpopulation: Economically, a situation in which an increase in the size of the labor force will result in an increase in per-worker productivity.
uniform region: A territory with one or more features present throughout and absent or unimportant elsewhere.
urban
urban geography: The subdiscipline of geography that derives from the study of cities, urban processes, and the built environment.

V

vale: Another name for a valley.
valley: 1) A low area between hills or mountains, often with a river running through it; 2) a depression that is longer than it is wide.
vertical exaggeration: A scale used in certain maps, such as raised-relief maps, that deliberately distorts the apparent elevation of the map's topography in order to emphasize vertical features, which might otherwise appear too small to identify relative to the corresponding horizontal scale.
vent: An opening at the Earth's surface through which volcanic materials (lava, tephra, and gases) erupt. Vents can be at a volcano's summit or on its slopes; they can be circular (craters) or linear (fissures).
viewshed: The geographical area that is visible from a particular location. It includes all surrounding points within line-of-sight of the location and excludes points beyond the horizon or obstructed by terrain and natural or artificial objects.
village: A small, clustered human settlement or community, usually larger than a hamlet but smaller than a town and often in rural areas, though the criteria for distinguishing a village can vary considerably in different parts of the world.
volcanic avalanche: A large, chaotic mass of soil, rock, and volcanic debris moving swiftly down the slopes of a volcano. Volcanic avalanches can also occur without an eruption due to an earthquake, heavy rainfall, or unstable soil, rock, and volcanic debris. Also called a debris avalanche.
volcanic crater
volcano: A vent (opening) in the Earth's surface through which magma erupts, or the landform that is constructed by eruptive material.

W

water mapping: A collection of data represented as a map showing different aspects related to water supplies.
water pollution: The contamination of water by chemical or biological constituents which make it unfit for use.
water table: The level below the land surface at which the subsurface material is fully saturated with water. The depth of the water table reflects the minimum level to which wells must be drilled for water extraction.
watershed: Another name for a drainage divide or drainage basin.
waterway: Any body of water that is deep, wide, and slow enough to be navigable by watercraft.
weathering: The breaking of rocks into smaller rocks, gradually becoming soil.
Western Hemisphere: The half sphere of the Earth that is west of the Prime Meridian and east of the antimeridian. It is opposite the Eastern Hemisphere.
wetland
windward: The side of a landmass facing the direction from which the wind is blowing. It is the opposite of leeward.
world map: A map of most or all of the surface of the Earth.

Z

zoning: The public regulation of land and building use to control the character of a place.
zenith

Notes

Much of this material was copied from U.S. government works which are in the public domain because they are not eligible for copyright protection.

References

Source of article : Wikipedia

Glossary of geography terms

Sabtu, 30 Juni 2018