|By Robert B. McLeod|
Sep 26, 2010
Apparently these are the fellows who exploited the turquoise deposits the in the various shafts on the shelf. Visible dates are from 1923, 1933 and maybe one from later. The turquoise is of poor quality as it's friable, but of deep blue color. I'm going to get Ryan Leary, a geology grad student, to do the climb and interpret the diggings.