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 .
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]
