Title
Adinole
Identifier
KBR-16
Description
Adinole was collected from the farm Murrelfontein and occurs above a conspicuous dolerite pegmatite. Adinole is a dense rock of mostly quartz and albite formed as the alteration product of contact metamorphism. It is potassium-rich and has hercynite, a mineral that can occur in high-grade metamorphosed iron rich argillaceous sediments. This adinole is a medium grained, holocrystalline, hypidiomorphic-granular texture.There are gray crystals ranging from < 1 mm- 3 mm. It has a dusty red and yellow weathered surface. It has a vein of a very dark aphanitic material.There is a radiating structure present in thin section.
Date
No date given.
Contributor
Western Minerals, Inc.
Is Part Of
http://www.geosciencecollections.milne-library.org/collections/show/17
Spatial Coverage
Karoo- Birds River, Eastern Cape, South Africa
Temporal Coverage
183-179 Ma (Jurassic)
Accrual Method
Purchased from Western Minerals, Inc.
Unit
Lesotho Formation
Number of Thin Sections
1