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Britannia Mine (Snowdon Mine), Mt Snowdon, Gwynedd (Caernarvonshire), Wales, UK
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UK Grid Reference: SH616547
Latitude: 53°4'16"N
Longitude: 4°3'57"W
A copper mine, first mentioned around 1800, by the lake of Llyn Llydaw on the slopes of Mt Snowdon. The mine was worked intermittantly if rather unsuccessfully for over 100 years by a number of companies including the Snowdon and Dalawin Copper Mines (1847); Cwm Dyle Rock and Green Lake Copper Mining Company (1851); Cwmdyle Copper Mining Ltd (1857); Gt Snowden Copper Mining Company (1873); North Wales United Mines (1890); by perhaps the best known company, the Britannia Copper Mine Ltd (1898); and finally by the Penypass Copper Company (1915). The mine closed in 1916.

Some of the 8 levels remain, together with the remains of the Britannia mill and other buidings around the lake shore.
Further details, including a plan and section of the mine and underground black and white photos, are in Colman and Laffoley (1986)

Mineral List

Lanthanite-(Ce) (TL)

14 entries listed. 14 valid minerals. 1 type locality (valid mineral).

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- Colman, T B and Laffoley, N d'A. (1986): Brittania or Snowdon Mine. Bulletin Peak District Mines Historical Society, Vol. 9, No. 5, 313-331.
- Reedman, A J, Colman, T B, Campbell, S D G and Howells, M F. (1985): Volcanogenic mineralisation related to the Snowdon Volcanic Group (Ordovician), Gwynedd, North Wales. Journal Geological Society London, 142, 875-888.
- David Bick (2003): The Old Copper Mines of Snowdonia. 3rd Edition, xx pp.

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