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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

tephra

Earth science; Geology

general term for all pyroclastic material.

tensile fracture

Earth science; Geology

A fracture caused by tensional stress in a rock.

temperate glacier

Earth science; Geology

A glacier whose temperature throughout is at, or close to, the pressure point of ice, except in winter when it is frozen for a few meters below the surface.

tell

Earth science; Geology

An artificial hill formed by the debris of successive human settlements.

tar

Earth science; Geology

A thick brown to black viscous organic liquid, too thick to migrate easily through most porous sediment.

taconite

Earth science; Geology

A bedded ferruginous chert containing at least 25% iron. A potential iron ore.

syncline

Earth science; Geology

A fold that is convex downward, or that had such an attitude at some stage in its development. compare anticline.