Granite

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

Spatial Coverage

St. Francois Mts. Batholith , Missouri

Accrual Method

Purchased from Western Minerals Inc.

Number of Thin Sections

1

Geolocation