File:Scara Ruadh - geograph.org.uk - 1349400.jpg

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English: Scara Ruadh The brown bands between the grey gneiss are where relatively unstable crystals (such as pyroxene and olivine) normally found deep in the crust of the Earth have weathered to form other minerals (such as anthophyllite) following metamorphism and contact with water. They got there by being injected into the gneiss in the form of dykes formed from ultramafic magma - that is, magma with a very high iron and magnesium content, probably rising straight from the Earth's mantle.
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Source From geograph.org.uk
Author Anne Burgess
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Anne Burgess / Scara Ruadh / 
Anne Burgess / Scara Ruadh
Camera location57° 47′ 15″ N, 6° 57′ 16″ W  Heading=45° Kartographer map based on OpenStreetMap.View this and other nearby images on: OpenStreetMapinfo
Object location57° 47′ 15″ N, 6° 57′ 16″ W  Heading=45° Kartographer map based on OpenStreetMap.View this and other nearby images on: OpenStreetMapinfo

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Attribution: Anne Burgess
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current05:31, 28 February 2011Thumbnail for version as of 05:31, 28 February 2011427 × 640 (310 KB)GeographBot (talk | contribs)== {{int:filedesc}} == {{Information |description={{en|1=Scara Ruadh The brown bands between the grey gneiss are where relatively unstable crystals (such as pyroxene and olivine) normally found deep in the crust of the Earth have weathered to form other m

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