File:Sunset at Allt Wen - geograph.org.uk - 1751729.jpg
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English: Sunset at Allt Wen The Sun sets over the wave-cut platform below Allt Wen. In the foreground stands a rock shaped by the tides and displaying the alternating layers of the folded sediment. Taken with a flash to bring out the strata.
Allt Wen, the northern end of the coastal cliff south of Aberystwyth, is a remarkable geological site. A number of micro-folds only a few metres across with nearly parallel vertical limbs have been exposed on a wave-cut platform at the base of the cliff. The exact sequence of events that have taken place here is still debated, but it is thought that during the Caledonian orogeny 400Ma ago, freshly deposited layers of sediment became pressurised and folded before they were fully lithified and thus more deformable. There are also quartz veins parallel with the bedding in some places. It is thought that they were pressed into the fresh sediment before the folding took place. For more details, see the Geological Conservation Review's site report http://www.thegcr.org.uk/Sites/GCR_v03_C04_Site2318.htm . |
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| Source | From geograph.org.uk |
| Author | Rudi Winter |
| Attribution (required by the license) | Rudi Winter / Sunset at Allt Wen / |
| Camera location |   | View this and other nearby images on: OpenStreetMap |  |
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| Object location | | View this and other nearby images on: OpenStreetMap | |
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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 Rudi Winter 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: Rudi Winter
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| current | 00:41, 6 March 2011 | | 1,024 × 768 (217 KB) | GeographBot (talk | contribs) | == {{int:filedesc}} == {{Information |description={{en|1=Sunset at Allt Wen The Sun sets over the wave-cut platform below Allt Wen. In the foreground stands a rock shaped by the tides and displaying the alternating layers of the folded sediment. Taken w |
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