 | | Pollaphuca, Mourne Mountains, Co.Down, July 1997. |
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| Site Type: | Mountan outcrop | | Site Status: | local interest | | Council area: | Newry, Mourne & Down District Council | | Grid Reference: | J310283 | | Bing maps: | 54.1874,-5.99321 | | Google maps: | 54.1874,-5.99321 | | Rocks |
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| Rock Age: | Tertiary (Eocene, Palaeocene) | | Rock Name: | Granite, Mourne Mountains Granites | | Rock Type: | Granite, Greisen | | Interest |
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| Minerals: | Cassiterite, Epidote | | Other interest: | mineral vein |
| Summary of site: |
| In this area there are veins in the granite formed when hot, mineral-rich solutions circulated through the rock after it had solidified. The veins are of quartz and white mica (greisens) and contain epidote, an apple-green mineral (a hydrated calcium aluminosilicate) and also cassiterite, a tin oxide. This is the only known occurrence of cassiterite in Northern Ireland. |
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