Ogof Dan y Lleuad Wen, Ogof Dan Y Lleuad Wen, Ogof Dan-Yr-Lleuad Wen, Ogof Dan Yr Lleuad Wen, Ogof Dan Y Lleaud Wen, Under the White Moon Cave

NGR: SN 75801 18645
575 m.asl

Carmarthenshire , Northern Outcrop - West (Black Mountain)
map using leaflet map:
Access Situated in one of the many small shakeholes on northern flank of Foel Fraith, with a longer, rocky, depression nearby
Description A short clamber about 4 metres deep leads to a tight muddy slot. Beyond is a hands and knees crawl past a stalagmite in the middle of the passage until it is possible to stand up about 15 metres in a small chamber with large boulders at the head of a 12 metre pitch into a large, boulder floored passage. Across from the pitch is the way on down a climb and along a passage passing an oxbow which emerges after a pitch down on the left to the sandy lower series. The passage enlarges at an eyehole into the lower series, goes up a boulder slope, and along a low passage to the head of the impressive Canyon, where the floor descends before rising, past a passage on the right, to a chamber. The right hand passage leads to much more passage, including several large chambers, and blind pitches up to 20m deep...
History Mark Withers et al (ISCA), 1991; Amman Valley CC (Liam Keally, John Drury, Adrian Thomas); GOG extensions from 2004..
SSSI: 0854 Mynydd Du (Mixed)

Brendan Marris

Barry Hill

Barry Hill

Mark Burkey
Isca CC 1993; Descent 113; GOG (1995/2005, unpub.)
The Caves of Carmarthen, 1990, p.75
Descent 102, 1991, p.12
Descent 104, 1992, p.34
Caves and Caving 54, p.20
Caves and Caving 55, 1992, Keith Jones, pp.28-29
Caves and Caving, Summer 1993, p.6, Nig Rogers, Ogof Dan y Lleuad Wen [Lon Drury], in Bill Gascoine, South Wales News
Descent 113, 1993, p.10
SWCC Newsletter 114, 1994, pp.7-9, Paul Tarrant, To Dig With Nig
SWCC Newsletter 115, 1995, pp.7-9, Liam Kealy, To Dig With Nig, or Not
Caves of South Wales, 1995, p.116
Walker, P.L. (1993) - A study of the fauna of Ogof Dan y Lleuad Wen: a newly discovered cave in South Wales (University College of North Wales, Bangor, pp.66, unpub.)
Dyfed Invertebrate Group nl.30 (Spring 1995), pp.20-24, The crustacea of Carmarthenshire caves, Peter Walker
Descent 136, 1997, p. 9
ISCA Caving Club Journal 1, Volume 14, p.3
Wales Underground (CCC n/l.61), Dec 2019
Descent 272, 2020, p.18
Brendan Marris Caves of South Wales
ChelseaSS nl.62(4-6), The Secret Extension to Ogof Dan y Lleuad Wen Jun 2020
Cambrian Cave Registry entry 146
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