File:Tourmaline-feldspar-quartz, Erongo Granite Namibia.jpg
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Summary
| Description |
Tourmaline-feldspar-quartz from the Cretaceous of Namibia. (~2.45 cm across at its widest) Black = schorl tourmaline Light-colored material - microcline feldspar and quartz This is a schorl tourmaline-rich sample from the Erongo Granite of Namibia. The Erongo Granite is a subvolcanic ring dike granite. It represents magma that cooled underneath an ancient, now-deeply eroded volcano. Geologic unit: Erongo Granite, Erongo Complex (Erongo Volcanic Complex), Damara Orogenic Zone (Damara Belt), ~earliest Cretaceous, 144 Ma Locality: unrecorded site at Lions Head (= southern Erongo Complex), 30 to 40 km northwest of the town of Karibib, Erongo Mountains, Karibib District, Erongo Region, northwest-central Namibia |
| Date | |
| Source | Tourmaline-feldspar-quartz (Erongo Granite, Early Cretaceous, 144 Ma; Lions Head, Erongo Mountains, Namibia) 2 |
| Author | James St. John |
Licensing
This file is licensed under the Creative Commons Attribution 2.0 Generic license.
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This image was originally posted to Flickr by James St. John at https://flickr.com/photos/47445767@N05/25987991522. It was reviewed on 13 April 2016 by FlickreviewR and was confirmed to be licensed under the terms of the cc-by-2.0. |
File history
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 16:51, 13 April 2016 | | 1,747 × 1,515 (1.14 MB) | Tillman | Transferred from Flickr via Flickr2Commons |
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