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Rocks
SUBJECT : Environmental Science and Technology
AUTHOR : KSOU
PUBLISHED ON : 01/10/13
NUMBER OF PAGES : ( 11 Pages)
PRICE : Rs 8.25

The Earth's outer solid layer, the lithosphere, is made of rock. In general rocks are of three types, namely, igneous, sedimentary, and metamorphic. The scientific study of rocks is called petrology, and petrology is an essential component of geology. The three main ways rocks are formed Sedimentary rocks are formed through the gradual accumulation of sediment: Metamorphic rocks are rocks which once existed as igneous or sedimentary rocks but have been subjected to varying degrees of pressure and heat within the Earth's crust.


 
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