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Excerpt from The Oklahoma Geological Survey, Its Origin, Scope and PurposeGeologists divide the rocks on the earth's crust into three gen eral classes, igneous, sedimentary, and metamorphic.Igneous or crystalline rocks are those which were part Of the original earth's crust, or which have come up from the interior of the earth. Some of the chief types Of igneous rocks are

Title : The Oklahoma Geological Survey, Its Origin, Scope and Purpose (Classic Reprint)
Author : Charles Newton Gould
Language : en
Rating :
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Type : PDF, ePub, Kindle
Uploaded : Apr 03, 2021

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