File:Dacite (Tertiary; Mt. General, San Bernardino County, California, USA) 15.jpg
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Summary
| Description |
English: Dacite from the Tertiary of California, USA.
Dacite is an extrusive igneous rock intermediate in composition between andesite and rhyolite. It has a crystalline texture and is usually porphyritic. The phenocrysts in this sample are moderately small and include quartz (= glassy gray), plagioclase feldspar (= white), and biotite mica (= black). Locality: Mt. General, Mojave Block, San Bernardino County, southern California, USA |
| Date | |
| Source | https://www.flickr.com/photos/47445767@N05/50506844053/ |
| 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@N05/50506844053. It was reviewed on 20 October 2020 by FlickreviewR 2 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 | 01:50, 20 October 2020 | | 2,682 × 1,942 (3.69 MB) | Ser Amantio di Nicolao | Uploaded a work by James St. John from https://www.flickr.com/photos/47445767@N05/50506844053/ with UploadWizard |
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