L:1608
V:

Ogof Tarddiad Rhymney, Ogof Tardiadd Rhymney, Ogof Tardiardd Rhymney, Cave Source of the Rhymney


NGR: SO 08511 14117
561 m.asl

Powys , Northern Outcrop - East (Morlais to Abergavenny)
map using leaflet map:
Cave
Access The cave is located in the Cwar Yr Ystrad quarries, which are currently not being operated. The road from Trefil is private from the end of the village and will be gated at weekends and after the current quarry stops operating.
Description The cave is located at the bottom of the quarry face in near the centre of the Westernmost quarry. The entrance is generally filled with a drystone wall and drops into a large passage. The cave is both large and extensive passing boulder chokes to lead to a final chamber from where the small stream flows in a small passage that eventualy becomes too low to follow.
History GOCyF 1993?; extended UBSS, 2011
Hydrology Lycopodium spore tested to Rhymney Risings
Conservation
SSSI: 0298 Cwar yr Ystrad a Cwar Blaen Dyffryn (Geological)
Survey
GOCAF
UBSS extension (2011)
References
Caves & Caving 70, p.9, 1995, Ogof Tardiadd Rhymney
Caves and Caving 76, Summer 1997, pp.12-13, Ogof Tardiardd Rhymney extensions
UBSS nl ser.3(11) pp.11-13, Dickon Morris, 2011, Desperate squeezes and uninspiring
Descent 224 p.13, Dickon Morris, Tarddiad Rhymney extends into shale
Brendan Marris Caves of South Wales
Cambrian Cave Registry entry 1604
© Cambrian Caving Council ⓗ 2017