Monmouthshire
, Northern Outcrop - East (Morlais to Abergavenny)
map using leaflet map:
Cave
Access
In Quimps Quarry on the North side of Gilwern Hill above Twyn Wenallt. Best approached from Pwll Du, Blaenavon.
Description
The rift entrance leads to a single passage, 180m long which ended in a clay fill at Gritstone / Limestone interface until this passed via the Wind Tunnel into the 20x30m, sloping, 1 to 3m high, Queen of Hearts chamber where no limestone is to be seen.
History
Graffiti from 1903 and 1923; SWCC 1951; CwmbranCC 1994, 1997
Hydrology
Conservation
SSSI: 0380 Gilwern Hill (Mixed)
Gallery
Brendan Marris 2009
Survey
Descent 140 (Queen of Hearts chamber)
References
Adrian Fawcett, The Queen of Hearts, Descent 140 (1998) p.35
Cwmbran CC Journal 22, pp.8,9
Adrian Fawcett, Exploration in Ogof Dwy Sir, CwmbranCC Jnl 23 (1998) pp.7-9
CKS 25(1),p.37, O.Clarke, Deposits of poorly consolidated pebbly sand in Ogof Dwy Sir: their form, location and possible provenance
CKS 27(3),p.130, Owen Clarke, Conditions in caves and other karst features in the Pwll Du area at the time of the Namurian trangression
