File:Agate-lined geode (Black Rock Desert, Gerlach, Nevada, USA) (33974978773).jpg
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| Description |
This shows the interior of a geode. Geodes are small to large, subspherical to irregularly-shaped, crystal-lined cavities in rocks. They form when water enters a void in a host rock and precipitates crystals. The most common geode-lining mineral is quartz. This Nevada geode is lined with agate (= thinly layered portion), which consists of irregularly, concentrically-layered chalcedony (= fibrous microcrystalline quartz). Locality: unrecorded/undisclosed site in the Black Rock Desert, near Gerlach, western Nevada, USA |
| Date | |
| Source | Agate-lined geode (Black Rock Desert, Gerlach, Nevada, USA) |
| Author | James St. John |
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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@N05/33974978773 (archive). It was reviewed on 10 October 2019 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0. |
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 07:14, 10 October 2019 | | 2,651 × 2,410 (3.6 MB) | Ser Amantio di Nicolao (talk | contribs) | Transferred from Flickr via #flickr2commons |
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