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| − | '''Anorthosite''' is a phaneritic, igneous rock characterized by a predominance of plagioclase feldspar. It was first discovered on the Moon at Hadley Rille during the Apollo 15 mission by astronaut Dave Scott, the rock dubbed "The Genesis Rock". | + | '''Anorthosite''' is an igneous plagioclase feldspar rock with a composition of CaAl<SUB>2</SUB>Si<SUB>2</SUB>O<SUB>8</SUB>. It is of a white and granulitic composition. |
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| − | Anorthosite has a composition of CaAl<SUB>2</SUB>Si<SUB>2</SUB>O<SUB>8</SUB>, with a high concentration of Aluminum and Oxygen. It is of a white and granulitic composition.
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| − | Anorthosite is commonly found in Highlands and Rilles, and is responsible for much of the lighter color composition of the moon; which is to differentiated by the basaltic/volcanic rocks of the Lunar Mares (Seas). It is of historical significance in solving one of the great mysteries of the formation of the moon. Apollo astronaut crews were requested to specifically search for anorthosite. Its presence indicates that the Moon was not a captured asteroid but was a product of a cataclysmic collision with the Earth, and as a result shares many chemical isotope properties as Earth rocks.
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| | [[Category:Minerals]] | | [[Category:Minerals]] |
Revision as of 09:25, 5 August 2008
Anorthosite is an igneous plagioclase feldspar rock with a composition of CaAl2Si2O8. It is of a white and granulitic composition.
