Definition
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Etymology
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Shoshonite is a basaltic rock, properly a potassic trachyandesite, composed of olivine, augite and plagioclase phenocrysts in a groundmass with calcic plagioclase and sanidine and some dark-colored volcanic glass
From the place of origin called Shoshone riverin Wyoming
Durable Rock, Medium Hardness Rock
Coarse Grained Rock, Fine Grained Rock, Medium Grained Rock, Opaque Rock
Charnockite is a variety of granite containing minerals like orthopyroxene, quartz, and feldspar
From Job Charnock, an administtrator of East India Company
Coarse Grained Rock, Opaque Rock