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Earth science

Any of several geological sciences that are concerned with the earth, its origins, and all of its various structures and physical forms and phenomena.

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Earth science > Geology

bush fallowing

Earth science; Geology

A type of subsistence agriculture which relies on land being left 'fallow' to regrdw and regenerate its soil system before being recultivated.

carboniferous

Earth science; Geology

A period of time in the Paleozoic era that includes the Pennsylvanian and Mississippian periods and extended from 360 to 286 million years ago.

conservation

Earth science; Geology

The protection of an area, or particular element within an area, accepting the dynamic nature of the environment and therefore allowing change.

a-horizon

Earth science; Geology

The top layer of soil. Plant and other organic debris builds up in this layer. This is the part of the soil generally referred to as 'top soil'.

back arc basin

Earth science; Geology

A depression landward of a volcanic arc in a subduction zone, which is lined with trapped sediment from the volcanic arc and the plate interior.

barometer

Earth science; Geology

Any instrument used to measure air (barometric) pressure. Two types of commonly used barometers are the aneroid barometer and mercury barometer.

cavitation

Earth science; Geology

Taking place in high velocity stream where air bubbles form and collapse within the water causing shock waves through the channel bed and banks.