BULL. GEOL. SOC. AM. 



VOL. 15, 1903, PL. 24 



Figure 1. — Deadwood Sandstone 

 In the lower portion of Deadwood, South Dakota. Looking north 



FlGlJHE 2. — MlNNEKAHTA LlMKSTONE 



In Gillette canyon, southeast of Newcastle, Wyoming. Typical cliff surmounting slope of Opeche red beds 



DEADWOOD SANDSTONE AND MlNNEKAHTA LIMESTONE 



