File:Patterned ground - geograph.org.uk - 275802.jpg
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| Description |
English: Patterned ground The plateau ground to the west of Mynydd Pen Cyrn is scattered with gritstone boulders arranged in a pattern of polygons. This is a relict feature of arctic conditions which prevailed in this location at the end of the last glacial period (about 10,000 years ago), and was caused by frost shattering of the underlying rock and subsequent upheaving under cycles of ground freeze/thaw. The technical term for the arctic conditions is periglacial and the patterned ground is a periglacial feature. |
| Date | |
| Source | From geograph.org.uk |
| Author | Duncan Hawley |
| Attribution (required by the license) | Duncan Hawley / Patterned ground / |
| Object location |   | View this and other nearby images on: OpenStreetMap |  |
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_heading:270.00&language=en){kind=link}
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This image was taken from the Geograph project collection. See this photograph's page on the Geograph website for the photographer's contact details. The copyright on this image is owned by Duncan Hawley and is licensed for reuse under the Creative Commons Attribution-ShareAlike 2.0 license.
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This file is licensed under the Creative Commons Attribution-Share Alike 2.0 Generic license.
Attribution: Duncan Hawley
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
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| current | 20:05, 12 December 2010 | | 640 × 480 (199 KB) | GeographBot (talk | contribs) | == {{int:filedesc}} == {{Information |description={{en|1=Patterned ground The plateau ground to the west of Mynydd Pen Cyrn is scattered with gritstone boulders arranged in a pattern of polygons. This is a relict feature of arctic conditions which prevai |
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