Alex said:
What natural event could take down seperate formations like that unless there is a likely boulder lying around that fell from somewhere. I am afraid it is most likely deliberate.
Erm, an earth tremor? We get loads of those, although most are missed by people. I can quote 4 examples from my own main caving area. (Ie: the Manifold area.) And one from another area:-
1. A couple of years ago, we were trying to get back into the 'terminal' chamber of Rabbit's Hole between Wetton Mill and Ecton only to find it no longer existed, cos the roof had collapsed since I was last there in the late 70's.
2. Movement of large slabs of rock a couple of years ago in the entrance series of Waterways Swallet where the first climb down is. (Just before the first solid chamber.) I have been going down there for around 25 years and that was the first time those rocks had moved!
3. When we were enlarging a squeeze at the top of Barn Pot in the floor of Prospect Chamber in Darfar Pot a couple of years ago, we came back a week later to find some massive rocks had collapsed from the roof right above where we had been working. (All looked solid the week before!)
(There had been a large tremor reported in the Manchester area that week, IIRC.)
4. A year or so ago, much of the clay floor between the entrance chamber and main chamber of St. Bertram's cave at Beeston Tor was found to be extensively cracked with sections of the floor able to be rocked back and forth! (It had been solid for the previous 30 years at least!)
There are also masses of cracked and broken stals in the new series of Critchlow cave which had occurred naturally before Pete Mellors and I first entered it in the 1980's...
Is that enough examples?