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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
A sedimentary rock, deposit of a submarine turbidity currents and are composed of layered particles
From Medieval Latin turbiditas, from Latin turbidus (turbid). Turbidity current is from 1939
Coarse Grained Rock, Fine Grained Rock, Opaque Rock