Title
Granite
Identifier
SFM-1
Description
Hand Sample: Holocystalline, phaneritic, medim-grained granitoid with subhedral grains of smoky quartz, plagioclase feldspar, potassium feldspar, and biotite. Weathering to red-yellow on some surfaces.
Thin Section, XPL: Subhedral medium-grained crystals with moderate weathering. 50% quartz, 30% plagioclase feldspar, 5% biotite, 5% augite, opaques, and potassium feldspar.
Date
1/20/1969
Is Part Of
Spatial Coverage
St. Francois Mts. Batholith , Missouri
Accrual Method
Purchased from Western Minerals Inc.
Number of Thin Sections
1