BULL. GEOL. SOC. AM. 



VOL. 15, 1903, PL. 32 



Figure 1. — Eastern Slope of Rocky Mountains, Moruison, Colorado 

 Lower Wyoming red grits in foreground ; hogbacks of "Dakota" sandstone in distance 



Figure 2. — North Platte River, south or Douglas, Wyoming 



Red beds in river banks, overlain by Sundance; Morrison and Dakota formations in distance; Minnekahta 



limestone in the right foreground 



EASTERN SLOPE OF ROCKY MOUNTAINS AND NORTH PLATTE RIVER 



