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Geology

The science that comprises the study of the solid Earth and the processes by which it is shaped and changed.

Contributors in Geology

Geology

Extrusive volcanic rocks

Earth science; Geology

Magma that erupts onto the surface is called lava. It cools very quickly because the temperature at the surface is relatively low, and crystals will probably cease growth because the liquid is ...

Volcanic glass

Earth science; Geology

Natural glass produced by the cooling of molten lava, or some liquid fraction of it, too rapidly to permit crystallization. Examples are obsidian, pitchstone, tachylyte, and the glassy groundmass of ...

Volcanic plains

Earth science; Geology

Basaltic lava plains are the most widespread and voluminous features on Venus. The plains have been compared to the huge flood basalts on the Earth and the lunar Maria, but are much more extensive.

Weathering

Earth science; Geology

The process by which Earth materials change when exposed to conditions at or near the Earth's surface and different from the ones under which they formed. compare decomposition , disintegration .

Wind streaks

Earth science; Geology

Dark and light streaks thought to be caused by the removal of a thin veneer of dust, revealing a darker surface beneath.

Volcanic shields

Earth science; Geology

A volcano in the shape of a flattened dome, broad and low, built by flows of very fluid lava.

Volatile elements

Earth science; Geology

A chemical element that exists in a gaseous state at relatively low tempertures.

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