Please find attached a
painted copy of the Eldon Quarry survey, if you wish to have a full copy, send me a personal message with your email address.
Guess i'll need to Explain it now.
I'll start with your bit, the orange box I believe is the most interesting bit for you to use GPR on, and may reveal some interesting results.
It contains the Green cross which I believe is the rough location of the "Eldon Quarry cave" denoted in the Old Caves of the peak district book (aforementioned
) although finding anything here would be some serious boulder choke work!
You can see the Avenmouth caves below the Orange box, the lead rake of Interest (dotted line on survey) veers to the south a little before emerging on the bench above Avenmouth caves.
The red arrow shows an entry point onto the 2nd bench, which I believe there to be what could be a rift at the position of the orange cross.
for interest I got onto the 2nd bench [above the orange cross] by going right on the second bench from the arrow (ie south west) and then scrambling up onto the bench above Avenmouth caves and then further scrambling onto the second bench.