Hand Sample: Holocrystalline, fine-grained phaneritic granite with crystals of potassium feldspar and smoky quartz. Weathers to orange-brown and light-gray.
Thin Section: Very weathered coarse-grained phenocrysts of quartz, alkali feldspar, and plagioclase feldspar. Smaller crystals of the same minerals and biotite surround the phenocrysts.
Western Minerals, Inc.
Is Part Of
St. Francois Mountains Batholith, Missouri
Purchased from Western Minerals, Inc.
Number of Thin Sections