BULL. GEOL. SOC. AM. 



VOL. 24, 1912, PL. 32 



Figure 1. — Weathered Specimen of the Bighorn Dolomite 

 Showing the relation between the transverse fluting and the pitted surface. Gros Ventre Range 









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Figure 2. A somewhat unusual Phask of phi Bighorn Dolomiti 

 In this specimen the small disk-shaped bodies maj represent algss <>r another type Teton Range 



BIGHORN DOLOMITE 



