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Tyddynbach Mine, Betws Garmon, Gwynedd, Wales, UK

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Other/historical region names associated with this locality: Caernarvonshire
 
A small and unsuccessful iron mine thhat worked the same ore body as the nearby Ystrad and Garreg Fawr mines. Like other Gwynedd iron mines, the ore worked was a sedimentary deposit precipitated as nodules within a cleaved mudstone, the Nant Ffrancon formation, that occurs widely across this area of north Wales.

Although exploration work may have occurred in the 1840s, iron ore on this site being referred to in a sale catalogue of 1859, no real work was done here until 1915. Even then, working was minimal, only 2 opening being made. Although several thousand tons of ore were raised, little appears to have been sold, with records showing only just over 100 tons of ore sold, this in the period 1917-18. The mine closed in 1918.

Like all of the Gwynedd iron mines, the ore's high silica content rendered it unattractive to distant ironmasters and contributed to the mine's ultimate failure.

Ref: Caernarvonshire Iron Ore, Jeremy S Wilkinson, British Mining No. 78, Memoirs 2005, Northern Mines Research Society.

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