Top Entrance , Ogof Nos Hir , OFD2 , OFD 2 , OFD Top Entrance , Ogof Ffynnon Ddu Top Entrance
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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
Smiths Armoury
OFD3 sump
Top Waterfall
Cwm Dwr Confluence
Conservation
SSSI: 0930 Ogof Ffynnon Ddu-Pant Mawr (Mixed)
Gallery
Brendan Marris
Gary Evans
Survey Imperial College CC, 1967. Part of Clay Series, in LUCC Jnl 5 SWCC; Descent 184, Nant Gam Choke References London Universities Caving Clubs Journal 5, pp.11-19. 1968 O.F.D. II, J,Winterhalder and A.C.Waltham SWCC Newsletter 58, 1968 The End? SWCC Newsletter 100, pp.4-16, 1985 Northern Lights Selected Caves of Britain and Ireland, 1997 CS 12(1),p.20, P.L.Smart; N.Chrisopher, Cave development Ogof Ffynnon Ddu CS 13(2),p.67, Owen Clarke, Relationships between surface geomorphology and speleogenesis in South Wales [Cretaceous age?] CKS 27(3),p.130, Owen Clarke, Generally disregarded patterns in mud floors in caves Descent 184, 2005, p15, The Nant Gam Extension Chelsea SS nl.52(1), pp.11-13 (2010) Tom Foord, OFD Flood Pulse - 21st November 2009 CKS 33(2),p.90, Owen Clarke, Bouma patterns: The downtrodden cave mud floor formation Descent 200, pp.36-40, Clive Westlake, Opening Top Entrance Brendan Marris Caves of South Wales Catalogue of Speleological Sites...between...A4067...Pant Mawr Moor, Gary Evans (2021),p.67
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Cambrian Cave Registry entry 360
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