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Top Entrance, Ogof Nos Hir, OFD2, OFD 2, OFD Top Entrance, Ogof Ffynnon Ddu Top Entrance


NGR: SN 86361 15882
432 m.asl

Powys , Northern Outcrop - Central (Penwyllt to Penderyn)
map using leaflet map:
Cave
Access Current Access arrangements
Description This entrance leads to a well decorated complex upper series from which several other sections of the cave lead off. Called Clay series originally, though this now tends to be called OFD2.
History SWCC opened this entrance in 1967
Hydrology
Conservation
SSSI: 0930 Ogof Ffynnon Ddu-Pant Mawr (Mixed)
Survey
SWCC; Descent 184, Nant Gam Choke
References
SWCC Newsletter 58, 1968 The End?
Descent 184, 2005, p15, The Nant Gam Extension
Descent 200, pp.36-40, Clive Westlake, Opening Top Entrance
Brendan Marris Caves of South Wales
Cambrian Cave Registry entry 360
© Cambrian Caving Council ⓗ 2017