Marks, John H. (John Henry)2018-07-242022-02-032018-07-242022-02-03https://hdl.handle.net/11124/172429Mine report no. 955.Includes illustration.Typescript (carbon copy).reportsengIn copyright - non-commercial use permitted (http://rightsstatements.org/vocab/InC-NC/1.0/).Mines and mineral resources -- Colorado -- Clear Creek CountyOres -- Colorado -- Clear Creek CountyAssaying -- Colorado -- Clear Creek CountyText