File:Verdite (microcrystalline fuchsite metamorphite) South Africa.jpg

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Verdite (fuchsite metamorphite) (6.5 cm across at its base) from the Precambrian of South Africa.

Verdite is a ~monomineralic, microcrystalline fuchsite metamorphic rock to an impure, microcrystalline fuchsite metamorphic rock. The dominant mineral, fuchsite, is a greenish, chromium-rich muscovite mica.

This rock was not accompanied by specific information, but it does come from the Archean of South Africa. It most likely comes from one of the two following South African verdite localities:

1) verdite lens in layered mafic-ultramafic dikes in shear zones in the Jamestown Schist Belt-Nelspruit Batholith transition area (the Nelspruit Batholith is Mesoarchean in age, 3.015 Ga); north or northwest of the town of Barberton, South Africa.

2) verdite lens or pod in ultramafic host rocks in the Onverwacht Group, Barberton Greenstone Belt, Paleoarchean, 3.30-3.55 Ga; southwest of the town of Barberton, South Africa.
Date
Source Verdite (microcrystalline fuchsite metamorphite) (Archean; South Africa)
Author James St. John

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This image was originally posted to Flickr by jsj1771 at https://www.flickr.com/photos/47445767@N05/15026553307. It was reviewed on 15 September 2014 by FlickreviewR and was confirmed to be licensed under the terms of the cc-by-2.0.

15 September 2014

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current14:01, 12 September 2014Thumbnail for version as of 14:01, 12 September 20144,615 × 3,097 (6.29 MB)Tillman (talk | contribs)Transferred from Flickr via Flickr2commons

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