Skrainka Diabase

Title

Skrainka Diabase

Identifier

SFM-11

Description

Hand Sample: Porphyritic diabase with light crystals in a dark-grey-to-black groundmass. Plagioclase 45%, Pyroxene 45%, Hornblende 5%, Olivine and Biotite 5%
Thin Section, XPL: 70% medium-grained interlocking plagioclase laths, 8% olivine, 7% opaques, 15% groundmass.

Date

1/20/1969

Contributor

Western Minerals, Inc.

Spatial Coverage

St. Francois Mountains Batholith, Missouri

Accrual Method

Purchased from Western Minerals, Inc.

Number of Thin Sections

1

Geolocation