L:106
V:9

Waterfall Cave, Black Rock Quarry Cave


NGR: SO 21274 12497
246 m.asl

Monmouthshire , Northern Outcrop - East (Morlais to Abergavenny)
 map using leaflet map:
Sink Cave
Access The cave lies at the foot of the south face of Black Rock Quarry A stream runs in a conduit from Ogof Rhaeadr Ddu and sinks in the cave.
Description The small entrance leads into an active stream passage. Upstream, the cave becomes too tight after the waterfall. Downstream leads to another waterfall and two chambers in a thick bed of shale.
History BNS, 1961
Hydrology The water emerges in Waterfall Cave Resurgence . Tests
Conservation SSSI: 0080 Mynydd Llangatwg (Mixed)
Gallery

Martin Laverty
2023
Above entrance
Brendan Marris
2012
Survey
BNSSS (1961)
Cwmbran CC, 1982
Cwmbran CC, 1985
CSS Records (19), 1992
Smith & Stevens, 2013
References
Theo Schuurmans, Keith Jones, Steve Ainley, CwmbranCC Journal 11, pp16-19 (1982)
Caves of South Wales, Stratford, T., 1995
A Caver's View of the Clydach River (Cwmbran Caving Club, 1986), Schuurmans, T.
Nicol,A., Gillespie,P.A., et al. Journal of Structural Geology 24 (2002) 709-727, Relay zones between mesoscopic thrust faults in layered sedimentary sequences [includes study of faulting seen in N and S walls of Blackrock Quarry around 1990]
Brendan Marris Caves of South Wales
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Cambrian Cave Registry entry 828
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