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.

7Categories 223518Terms

Add a new term

Contributors in Earth science

Become a Contributors

Earth science > Geology

silica

Earth science; Geology

Silicon dioxide (SiO2) as a pure crystalline substance makes up quartz and related forms such as flint and chalcedony. More generally, silica is the basic chemical constituent ...

sial

Earth science; Geology

The upper layer of the continental crust, so called because it is rich in silica and aluminum oxide. compare sima.

turbidite

Earth science; Geology

Sedimentary deposit settled out of turbid water carrying particles of widely varying grade size. Characteristically displays graded bedding.

tuff

Earth science; Geology

A general term for all consolidated pyroclastic rock. Not to be confused with tufa.

truncated spur

Earth science; Geology

The beveled end of a ridge separating two valleys where they join a larger glaciated valley. Glacier of main valley has eroded back the end of the ridge.