In reply to Baron Weasel:
> It's bullet hard volcanic rock!
From all the clues this looks likely to be Rainsborrow Crag in Kentmere.
It may be bullet hard rock but it is quite slatey and loosely bonded in varying sized shards.
I went once in 1973, the resulting new route did not even make it into the frcc archive .
Said archive has the 1969 guide as information, which even though written by one of the principal activists , hardly encouraged a visit.
Fwiw , I have just tabulated my hit list of routes and projects for this summer , covid permitting. It never entered my head to include a trip to rainsborrow, this year or any since 73 for that matter.
There are a lot of very good routes elsewhere in Cumbria that could do with a bit of tlc.
Probably better to practice your crag sprucing skills there first.