Earth science

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

density current

Earth science; Geology

A gravity-induced flow of one current through, over, or under another fluid media, owing to density differences. Factors affecting density differences include temperature, ...

desert

Earth science; Geology

A region with an average annual rainfall of 10 inches or less.

desert pavement

Earth science; Geology

A closely-packed surface layer of coarse pebbles and gravel.

diagenesis

Earth science; Geology

A group of processes that cause physical and chemical changes in sediment after it has been deposited and buried under another layer of sediment. Diagenesis may culminate in ...

diapir

Earth science; Geology

Forceful, upward intrusion of a rock mass into overlying rock. In the case of an igneous diapir, the intruding rock may be magma or a crystal-rich mush, either of which is less ...

diatreme

Earth science; Geology

A general term for a volcanic vent or pipe drilled through enclosing rocks (usually flat-lying sedimentary rocks) by the explosive energy of gas-charged magmas. The ...