Title
Granite (pink medium-grained)
Identifier
SFM-3
Description
Hand Sample: Holocrystalline, phaneritic, medium-grained granitoid with an abundance of alkali feldspar. Other minerals include quartz and biotite. Some chemical weathering has produced a white coating.
Thin Section, XPL: 70% quartz, 15% potassium feldspar, 10% plagioclase feldspar, 5% biotite. Quartz grains are subhedral and moderately fractured
Date
1/20/1969
Is Part Of
Spatial Coverage
St. Francois Mts. Batholith, Missouri at Scott's Quarry
Accrual Method
Purchased from Western Minerals, Inc.
Unit
Butler Hill granite of Boros Group
Number of Thin Sections
1