File:Igneous intrusions into the slate rock - geograph.org.uk - 283158.jpg
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English: Igneous intrusions into the slate rock Slate is the oldest rock in the Cwmystradllyn area. It began as mudstone which became changed in character by heat and pressure during the process of mountain building. At that time, the mudstone formed deep below the sea was subjected to the effects of molten igneous material which forced its way into the measures, changing them into slate. Igneous rocks, like the white bands seen here, do not cleave so cannot be split into slates and are good only for dumping on the waste tips. Quarrying at Gorseddau was bedevilled by the frequency of such intruded materials. |
| Date | |
| Source | From geograph.org.uk |
| Author | Eric Jones |
| Attribution (required by the license) | Eric Jones / Igneous intrusions into the slate rock / |
| 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 Eric Jones 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: Eric Jones
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- The topic category from Geograph was Quarry (disused) (find similar images (disused) at Geograph)
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
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| current | 19:29, 14 December 2010 | | 480 × 640 (116 KB) | GeographBot (talk | contribs) | == {{int:filedesc}} == {{Information |description={{en|1=Igneous intrusions into the slate rock Slate is the oldest rock in the Cwmystradllyn area. It began as mudstone which became changed in character by heat and pressure during the process of mountain |
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