What are the basick types of rocks?
1. Igneous: these are rocks that solidified directly from molten silicates, which geologists call magma. Igneous rock is formed by magma (molten rock) being cooled and becoming solid. They may form with or without crystallization, either below the surface as intrusive (plutonic) rocks or on the surface as extrusive (volcanic) rocks
Examples are: granite, basalt, pumice and flint (which is a form of quartz). Read More »
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