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Letter Mine, Letter, Mizen Peninsula, Co. Cork, Ireland
Baryte and copper mine worked sporadically from 1852-1893. The majority of mining (for baryte) took place from 1889-1893 with 800 tons being produced.
A blocked up adit level is visible today along with several fenced off ?collapses or pits. A considerable amount of spoil also remains and is highly similar to material found at Ballycummisk mine.
Main site and area of spoil at ITM 494719 535432
Mineral List
| Albite Baryte Bornite Brochantite | Calcite Chalcopyrite 'Chlorite Group' Chrysocolla | Hematite Langite Malachite Quartz | Tetrahedrite |
13 entries listed. 12 valid minerals.
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References
Dr. Richard Unitt & Barry Flannery (personal observations 22-1-11)
External Links
http://maps.epa.ie/MineDocs/Appendix%205%20Site%20Reports/West%20Cork/Letter.pdf - EPA Report on Letter Mine
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