Altered Basalt Flow

Title

Altered Basalt Flow

Identifier

SFM-16

Description

Hand Sample: Aphanitic grey-black color. Weathers to yellow-tan and orange. Small vesicles present.
Thin Section: Primarily matrix of opaques and some mica. Clusters of very-fine grained olivine and feldspar crystals present

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