Geology (from Greek γη- (ge-, "the earth") and λογος (logos, "word", "reason")) is the science and study of the solid matter of a celestial body, its composition, structure, physical properties, history and the processes that shape it. It is one of the Earth sciences. Geologists have helped establish the age of the Earth at about 4.6 billion (4.6x10⁹) years, and have determined that the Earth's lithosphere, which includes the crust, is fragmented into tectonic plates that move over a rheic upper mantle (asthenosphere) via processes that are collectively referred to as plate tectonics. Geologists help locate and manage the earth's natural resources, such as petroleum and coal, as well as metals such as iron, copper, and uranium. Additional economic interests include gemstones and many minerals such as asbestos, perlite, mica, phosphates, zeolites, clay, pumice, quartz, and silica, as well as elements such as sulphur, chlorine, and helium.

Astrogeology refers to the application of geologic principles to other bodies of the solar system. However, specialised terms such as selenology (studies of the Moon), areology (of Mars), etc., are also in use.

The word "geology" was first used by Jean-André Deluc in the year 1778 and introduced as a fixed term by Horace-Bénédict de Saussure in the year 1779. An older meaning of the word was first used by Richard de Bury. He used it to distinguish between earthly and theological jurisprudence.

More on [ Geology ]

Geology - Twitter Search

@graceluhsewe i need to have pictures for my geology project. so unless i can get them all in ds tomorrow, i'll need to use lunchtime. :/
lfabitch (Kaitlin Ashley) Wed, 09 Dec 2009 17:48:21 -0000
@graceluhsewe i need to have pictures for my geology project. so unless i can get them all in ds tomorrow, i'll need to use lunchtime. :/
Just aced my geology final.
DustyKramKram (Dustin Kramer) Wed, 09 Dec 2009 17:44:50 -0000
Just aced my geology final.
Done with geology lecture. One class down.
kmmcfarland (Kendra McFarland) Wed, 09 Dec 2009 17:41:11 -0000
Done with geology lecture. One class down.
..and that isn't so hard. ID what areas & structures geology/weather consistently whollop, don't live there. Keep access to useful supplies.
caroldn (Carol Dunn) Wed, 09 Dec 2009 17:40:33 -0000
..and that isn't so hard. ID what areas & structures geology/weather consistently whollop, don't live there. Keep access to useful supplies.
2/3rds of becoming resilient against disasters is setting life up so that geology/weather events can happen (as they will) & not impact you.
caroldn (Carol Dunn) Wed, 09 Dec 2009 17:39:33 -0000
2/3rds of becoming resilient against disasters is setting life up so that geology/weather events can happen (as they will) & not impact you.
Just completed a ten page long geology final...let freedom reign!!!!
kngcolour (Krista) Wed, 09 Dec 2009 17:37:05 -0000
Just completed a ten page long geology final...let freedom reign!!!!

Subscribe to Geology RSS feed