File:Rocks near Permaquid Lighthouse in Maine.jpg
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English: Bands of the metamorphic rock type called gneiss, capped by a light-coloured pegmatite vein, at Pemaquid Point, near Pemaquid Lighthouse in Maine, USA. The gneiss belongs to the Bucksport Formation, formed originally as sedimentary rock during the Silurian period (about 440 to 430 million years ago). Then, during the Devonian period, the sedimentary rock was heated and squashed, which changed the rock into gneiss. Although the pegmatite has not been precisely dated, it may be of Devonian age. Reference: Maine Geological Survey Geologic Site of the Month July, 2002: Scenic Ledges at Pemaquid Point Lighthouse https://www1.maine.gov/dacf/mgs/explore/bedrock/sites/jul02.pdf . |
| Date | Taken on 5 May 2013 |
| Source | https://www.flickr.com/photos/jariceiii/9232402557/ |
| Author | jar () https://www.flickr.com/people/jariceiii/ |
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This image was originally posted to Flickr by jar () at https://www.flickr.com/photos/34615979@N00/9232402557. It was reviewed on 17 December 2014 by FlickreviewR 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 | 17:54, 17 December 2014 | | 4,876 × 3,545 (2.93 MB) | GeoWriter (talk | contribs) | User created page with UploadWizard |
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