Your Guide To The Best Geology DVDs Starting With The Highest Reviews.

Geology DVDs

Welcome to the geology DVD page. as usual we will start out with an overiew of the subject. Geology (from Greek γη- (ge-, "the earth") and λογος (logos, "word", "reason")) is the science and study of the Earth, its composition, structure, physical properties, history, and the processes that shape it.

Geologists have helped establish the age of the Earth at about 4.5 billion (4.5x109) years, and have determined that the Earth's crust is fragmented into tectonic plates that move over a semi-molten 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 oil and coal, as well as metals such as iron, copper, and uranium. Additional economic interests include minerals such as asbestos, perlite, mica, phosphates, zeolites, clay, pumice, quartz, and silica, as well as elements such as sulfur, 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.