
The Lake District is geologically very old and these deposits are no different having formed around 470 million years ago in fact, something I found out after bumping into a handy information spot by an excellent pub at the bottom.

If you would like to find the Langdale deposits for yourselves, the deposits are most obvious near Harrison Stickle and Pavey Ark (in the Langdale Pikes area) in grid location NY275075 using an OS map (I hope i remembered my map reading skills) and are part of the Borrowdale Volcanics.