IO SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL.98 



Blacksmith dolomite: Feet 



Dolomite. Light-gray dolomite in massive layers, alternating 

 with bluish-gray layers. The latter contain many small dark 



"concretions" 445 



Dolomite. Drab and lead-colored dolomite 140 



Total 585 



Ute formation: 



Limestone. Bluish-gray limestone in thin and thick layers. 



About 180 feet above the base, fossils are abundant 350 



Shale. Drab and green arenaceous shale 45 



Dolomite. Thick-bedded, gray limestone alternating with thin beds. ... 57 

 Limestone and shale. Alternating beds of limestone and shale. Fossils.. 113 



Shale. Greenish, sandy shale 12 



Dolomite and limestone. Thick-bedded bluish-gray dolomite 



with bands of thinner-bedded limestone 105 



Shale and sandstone. Reddish-brown, sandy shale with a few 



layers of hard sandstone and a little green sandy shale near the top. . 30 

 Limestone. Thin-bedded (3 to 8 inches), compact, hard lime- 

 stone, with considerable dolomitic or arenaceous matter in 

 some of the layers. Small fragments of fossils 85 



Total 797 



S pence shale member: 



Limestone and shale. Blue-black calcareous shale and thin- 

 bedded dark gray limestone. Sponge spicules are common (loc. 5g) . . 125 

 Dark argillaceous shale 30 



Total 155 



Measurements were made in the hills north of the canyon where 

 faulting seems to be less serious. However, both the Ute and the 

 beds assigned to the Spence shale member are much thicker than in 

 the other sections, consequently it is possible that some faulting was 

 overlooked. The typical Spence shale fauna, characterized by Orycto- 

 cephalus is present. 



"Langston" limestone: 



Limestone. Dark gray, crystalline, very fossiliferous limestone Feet 



(loc. 54s) 6 



Total 6 





The fossils look like black velvet when first freed from the matrix. 

 Thousands of specimens were secured, and many more could be 

 uncovered in the larger pieces because fossils make up a large part 



