Altered Basalt Flow
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
Western Minerals, Inc.
Is Part Of
St. Francois Mountains Batholith, Missouri
Purchased from Western Minerals, Inc
Number of Thin Sections