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slope of canyon wall. On south wall of canyon, in Mesa Verde formation, coal is burning or has burnt for (sic) Newcastle at least four miles up Elk Creek . We camped a short distance NE of Rifle Gap , at 7:30 p.m., got to bed a little after ten.
Rifle Gap , Aug 4, 1909
Arose at 6:30. After breakfast Terry and I started down into the Gap on the SE side of creek. Between the first well defined sandstone ledge and the second we found Cardium speciosum , Mactra , Ostrea , Anchura , Lunatia and other gastropods in float rock. Immediately above the second ledge we found a fossiliferous stratum 2 or 3 ft. in thickness, dipping S angle 73¡, containing Anomia raeti-