From Sinc Y Giedd, head directly West towards the Twrch and Herbert's Quarry. Cross a very low ridge and at the foot of the next ridge are a number of large shakeholes. The entrance is in the largest of these which takes a stream from the North.
Dig at Sink in huge shakehole provides entry to cave.
Description
12 metre climb down through boulders to drop into a short, large passage having smaller passages off it. Longest side passage currently 230 metres long, much of it tight phreatic tubes running overall about 170 degrees.
History
SWCC, Pete Francis et al. in 1982, then Ali Garman et al. in 1997
Hydrology
Dye tested to DYO resurgence (48 hours) by W.Gascoine.
