Geology

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

Two points on the surface of a celestial body that are diametrically opposed to each other. The term may be extended to include a whole region at the opposite end of a body's diameter, as on Earth, ...

Crater mead

Earth science; Geology

Mead crater, with a diameter of 280 kilometres (174 miles), is the largest impact crater on Venus. The inner ring is thought to represent the original rim of the crater cavity, while the outer scarp ...

Backarc spreading

Earth science; Geology

The process by which the overriding plate in a subduction zone becomes stretched to the point of rifting, so that magma can then rise into the gap created by the rift. Backarc spreading typically ...

Current

Earth science; Geology

(1) The flowing of water, or other liquid or gas. (2) That portion of a stream of water which is moving with a velocity much greater than the average or in which the progress of the water is ...

Caliche

Earth science; Geology

Gravel, sand, or desert debris cemented by calcium carbonate, an accumulated product of chemical weathering in a dry climate. compare claypan, fragipan, hardpan.

Basin and range province

Earth science; Geology

This province extends from eastern California to central Utah, and from southern Idaho into the state of Sonora in Mexico. Within the Basin and Range province the Earth's crust and uppermost mantle ...

Bolide

Earth science; Geology

An extraterrestrial body in the 1-10-km size range, which impacts the earth at velocities of literally faster than a speeding bullet (20-70 km/sec = Mach 75), explodes upon impact, and creates a ...