Llyn y Fan Fawr

Llyn y Fan Fawr (Welsh: 'lake of the big peak') is a natural lake in the county of Powys, Wales. It lies at the foot of Fan Brycheiniog,[1] the highest peak of the Black Mountain (WelshY Mynydd Du) range within the Brecon Beacons National Park. Created as a result of glacial action,[2] it is one of the largest glacial lakes in southern Wales.[3] The lake is roughly rectangular in shape with its long axis oriented roughly north-south.

Llyn y Fan Fawr
LocationPowys, Wales
Coordinates51°52′52″N 3°42′0″W
Typenatural
Primary outflowsRiver Tawe
Basin countriesUnited Kingdom
Surface elevation605 m (1815 feet)

The surface of Llyn y Fan Fawr lies at about 1815 feet or 605m above sea level.[4][5] Its primary outflow is to the River Tawe.[6] Much of the land around the lake is peaty and thus wet underfoot.

References
  1. Andrew Davies; David Whittaker (9 September 2010). Walking on the Brecon Beacons. Cicerone Press Limited. pp. 191–. ISBN 978-1-84965-346-6.
  2. Geological Survey of Great Britain (1932). Memoirs. England and Wales: Explanation of Sheet. H.M. Stationery Office.
  3. Derek Ratcliffe (26 January 2012). A Nature Conservation Review: Volume 1: The Selection of Biological Sites of National Importance to Nature Conservation in Britain. Cambridge University Press. pp. 236–. ISBN 978-0-521-20329-6.
  4. Hans Luther; Julian Rzóska (1971). Project Aqua: A Source Book of Inland Waters Proposed for Conservation. International Biological Programme. ISBN 978-0-632-08730-3.
  5. Ordnance Survey Explorer map OL12 'Brecon Beacons National Park: western area'
  6. Bye-gones: Relating to Wales and the Border Counties. Printed at the Caxton works. 1894. pp. 504–.
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