A narrow, steeply descending hole, 8m deep. At the bottom there is standing room in a rift, which quickly closes down.
The sites close by are 4144 and 4146. The positions of sites 4146 and 4145 were altered January 2018 to more accurately show their position on the cliff line.
Reference: anon., 2015b (Easter logbook)
Entrance picture : yes
Underground pictures :
Detailed survey :
Line Survey :
On area survey :
Survex file :