Devonite (diabase-porphyry)

Title

Devonite (diabase-porphyry)

Identifier

SFM-20

Description

Hand Sample: Porphyritic diabase with coarse to very coarse grained subhedral pink-green plagioclase laths approximately 3cm in length set in a gray-black matrix. Inclusions of matrix present within plagioclase laths. Weathers to orange-brown.
Thin Section: Plagioclase laths fractured and rimmed with chlorite. Matrix includes 55% fine-grained interlocking euhedral plagioclase laths,10% opaques, among other mixed minerals.

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

2

Geolocation