BULL. GEOL. SOC. AM. 



VOL. 17, 1905, PL. 78 



Figure 1.— Ordovician Rocks on East Slope of Rocky Mountains Northwest of Canyon City, Colorado 



Looking north. Granite to left, Harding sandstone in quarry, slopes of Fremont limestone, Millsap 

 limestone, and Red beds to right. Photograph by C. D. Waleott 



Figure 2. — Harding Sandstone lying on Gneiss West of Canyon City, Colorado 



The man's feet are on the contact. Photograph by C. D. Waleott 



EXPOSURES OF ORDOVICIAN ROCKS AND HARDING LIMESTONE 



