Wills Granite (Musco group)
Hand Sample: Fine-grained phaneritic granite. Mineralogy includes potassium feldspar, quartz and a black mineral. Weathers to light orange.
Thin Section, XPL: 60% plagioclase, 30% quartz, 10% very-fine-grained biotite
Western Minerals, Inc.
Is Part Of
St. Francois Mountains Batholith, Missouri
Purchased from Western Minerals, Inc.
Number of Thin Sections