File:Garthna Geo composite dyke.jpg
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Summary
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| Description |
English: A composite dyke at Garthna Geo, Orkney, Scotland, with bostonite (syenitic) margins and a camptonite centre cutting Devonian age Harra Ebb sediments. The dyke has been dated to 313±4 Ma, Late Carboniferous, see [1] |
| Date | |
| Source | Own work |
| Author | Mikenorton |
Licensing
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File history
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 23:53, 18 January 2012 | | 2,445 × 3,259 (2.06 MB) | Mikenorton |
File usage
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