Keywords
Abstract
The science of studying rocks is called petrography and it is a branch of geology. As rocks. It refers to the natural geological parts that make up a large part of the earth's crust, consist of one or more minerals, and have a constant composition. If the rocks are composed of one mineral (gypsum, anhydride, quartz), they are called monomineralic, if they are composed of several minerals (granite, syenite, diabase, etc.), they are called polymineralic rocks. Igneous or igneous rocks.
References
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