Hogan Rhyolite (VanEast group)

Title

Hogan Rhyolite (VanEast group)

Identifier

SFM-22

Description

Hand Sample: Porphyritic fine-grained light-pink and black phenocrysts in a reddish-purple-brown matrix. Hospitable to grey-brown lichen.
Thin Section: Primarily matrix with very-fine grains of well-weatherd opaques and quartz with a high purple and blue biofringence

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