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Caspar quarry, Ettringer Bellerberg Mt. (Bellberg Mt.; Bellenberg Mt.; Billenberg Mt.; Boilenberg Mt.), Bellerberg volcano, Ettringen, Mayen, Eifel Mts, Rhineland-Palatinate, Germany Width of field 0.5 mm. Collection of Jesse Crawford. Compositing software: CombineZP. Equipment: Nikon D-100 digital camera on a homemade microscope. Tabular brownmillerite on a limestone matrix. The color ranges from a fairly light red-brown to nearly black. |
| © 2008 Jesse Crawford | Photo ID: 190758 View Count: 144 |
Brownmillerite : Ca2(Al,Fe3+)2O5 | |
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Caspar quarry, Ettringer Bellerberg Mt. (Bellberg Mt.; Bellenberg Mt.; Billenberg Mt.; Boilenberg Mt.), Bellerberg volcano, Ettringen, Mayen, Eifel Mts, Rhineland-Palatinate, Germany Red/red-brown crystals of Brownmillerite from the TL (analysed). Field of view 3 mm. Specimen and photo Leon Hupperichs. |
| © Leon Hupperichs | Photo ID: 103177 View Count: 450 |
Brownmillerite : Ca2(Al,Fe3+)2O5 | |
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Ettringer Feld, Western lava flow, Bellerberg volcano, Ettringen, Mayen, Eifel Mts, Rhineland-Palatinate, Germany Fragment of a Mayenite and Brownmillerite-bearing xenolith (xenolith B3), field of view 90 mm, Universität Köln |
| © Universität Köln | Photo ID: 230563 View Count: 40 |
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