Vince, Jake, Duncan, Nick, Jon, Tav and Mike.
The boulder removed, I swapped places with Jake, dug out some mud, some cobble- and boulder-sized lumps of rock and calcite then wriggled through into a small chamber, c.2m (h) x 3m (max. l) x c.1m (max. w), at first it appeared to be formed within a calcite vein but, more likely, it is part of a Neptunian dyke. A Carboniferous limestone fissure filled with Triassic [dolomitic] conglomerate that has degraded leaving the void that I was now standing in. Remnants of the conglomerate infill can be seen in the roof.
