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Physical geography
Industry: Geography
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Physical geography
Atomic energy
Geography; Physical geography
Energy released from an atomic nucleus because of a change in its subatomic mass.
Arkose
Geography; Physical geography
A type of sedimentary sandstone that contains a large quantity of weathered feldspar grains. This type of sedimentary rock forms in arid conditions.
Aridisols
Geography; Physical geography
Soil order (type) of the United States Natural Resources Conservation Service Soil Classification System. Aridisols are commonly found in dry environments that are low in organic matter and rich in ...
Area studies tradition
Geography; Physical geography
Academic tradition in modern Geography that investigates an area on the Earth from a geographic perspective at either the local, regional, or global scale.
Autumnal equinox
Geography; Physical geography
One of two days during the year when the declination of the Sun is at the equator. The autumnal equinox denotes the first day of the fall season. For the Northern Hemisphere, the date of autumnal ...
Autogenic succession
Geography; Physical geography
Succession where the plant community causes the environment to change and this modification drives the succession.