File:Pegmatitic granite (Tamminen Pegmatite, Oxford Pegmatite Field, Devonian to Permian; Tamminen Quarry, 2.5 miles SSE of Greenwood, southern Oxford County, southwestern Maine, USA) (15249689951).jpg
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Summary
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| Description |
Pegmatitic granite (6.1 cm across at its widest) from the Paleozoic of Maine, USA. This is pegmatitic granite (granite pegmatite), dominated by large crystals & formed by cooling of water-rich magma. The dominant minerals in this sample are quartz (gray), albite feldspar (gray), schorl tourmaline (black) and mangan-apatite (Mn-rich fluorapatite) (greenish). The mangan-apatite fluoresces yellow under short-wave ultraviolet light. Geologic unit & age: Tamminen Pegmatite, Oxford Pegmatite Field, Sebago Migmatite Domain, Central Maine Belt, Devonian to Permian Locality: Tamminen Quarry, 2.5 miles south-southeast of the town of Greenwood, southern Oxford County, southwestern Maine, USA (44° 16’ 58.85” North latitude, 70° 38’ 23.41” West longitude) |
| Date | |
| Source | Pegmatitic granite (Tamminen Pegmatite, Oxford Pegmatite Field, Devonian to Permian; Tamminen Quarry, 2.5 miles SSE of Greenwood, southern Oxford County, southwestern Maine, USA) |
| Author | James St. John |
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This image was originally posted to Flickr by James St. John at https://flickr.com/photos/47445767@N05/15249689951 (archive). It was reviewed on 12 November 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 | 04:15, 12 November 2019 | | 3,753 × 3,015 (2.77 MB) | Ser Amantio di Nicolao (talk | contribs) | Transferred from Flickr via #flickr2commons |
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