Page:Field Notes of Junius Henderson, Notebook 3.pdf/64

Rifle Gap Rifle, Colorado, Aug 5, 1909 August 5, 1909

Hot bright morning. Up at 6:30, broke camp and started for Pieance (sic) Creek Piceance Creek, Colorado at 8:30. Put on the odometer after travelling one mile by mile post. Saw meadowlarks Sturnella, mourning doves Zenaida macroura, many pinon jays Gymnorhinus cyanocephalus, long crested jays Cyanocitta stelleri, Arkansas flycatchers Tyrranus verticalis, one Louisiana tanager Piranga ludoviciana, rock wren Salpinctes obsoletus. As we passed out of the gap we found sandstones etc, dipping to the S or SW about 10°. These I take for Wasatch. Between these and the Mesa Verde sandstones are varicolored marls which surely are Wasatch. I believe that the entire series from the upper Mesa Verde sandstones to the top of the Book Cliffs Book Cliffs is probably referable to Wasatch. At one point on Government Creek Government Creek, Colorado there appeared to be an unconformity, sandstones resting apparently unconformably on the varicolored. However it seems to be in the axis of a fold and may be faulted.