pwhole
Well-known member
I recently photographed this strange formation in a Castleton cave passage and don't have much idea what's going on here - is this fossil-based, water-worn or what? It's not on a normal caver route, and so won't be seen very often, but I just wondered if this was a one-off, or there are other formations like it?
It seems to have a 'skin' of mineral over some other mineral, or possibly limestone - hard to tell. I'm wondering if it's some strange baryte formation. The area photographed is about two feet across, and the formation 'merges' into normal limestone and vein mineral at the base. The passage was visited by lead miners, so it's possible the 'skin' was broken off during their work.
It seems to have a 'skin' of mineral over some other mineral, or possibly limestone - hard to tell. I'm wondering if it's some strange baryte formation. The area photographed is about two feet across, and the formation 'merges' into normal limestone and vein mineral at the base. The passage was visited by lead miners, so it's possible the 'skin' was broken off during their work.