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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

assemblage

Earth science; Geology

The collection of minerals that characterize a rock or a facies.

astronomic theory of glaciation

Earth science; Geology

A theory based on the changing position of the Earth in its orbit around the Sun.

asymmetric rock knob or hill

Earth science; Geology

Bedrock forms with a gentle slope on one side created by glacial abrasion and a steep slope on the opposite side created by glacial plucking.

atomic mass number

Earth science; Geology

The sum of the number of protons and the number of neutrons in an atom. Approximately equal to the mass of the atom.

aureole

Earth science; Geology

A zone surrounding an igneous intrusion, in which contact metamorphism has taken place.

back-arc basin

Earth science; Geology

The region between an island arc and the continental mainland, commonly with at least some oceanic crust on its floor.

back swamp

Earth science; Geology

A swamp that forms in the low lying flood plain behind a levee.