194 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 53 



BLOOMINGTON FORMATION [Walcott, 1908a, p. 7] : 



Feet 



la. Thin-bedded, bluish gray, compact limestone with interbedded 



thick layers of gray limestone 22 



Fauna: 



Protospongia (spicules). 



Obolus mcconnelli pelias (Walcott) [1905, p. 330]. 



Obolus {Westonia) zcasatchensis Walcott [igoSd, p. 69]. 



Lingulella desiderata (Walcott) [1898, p. 399]. 



Hyolithes. 



Agnostus. 



Ptychoparia. 



lb. Greenish argillaceous shale 12 



ic. Gray, coarse-grained limestone 13 



Strike, north 20° east; dip, 20° west (magnetic). 



Fauna: 

 Hyolithes. 

 Ptychoparia. 



id. Greenish argillaceous and sandy shale 147 



Fauna (at base) : 



Hyolithes (fragments). 



Agnostus. 



Ptychoparia. 



le. Gray, coarse-grained limestone 4 



Fauna: 



Micromitra sculptilis (Meek) [1873, P- 479]- 



Hyolithes (abundant). 



Ptychoparia. 



Agraulos. 



if. Greenish argillaceous and sandy shale 22 



Total of 1 220 



2(7. Bluish gray limestones, with small concretions and small 

 nodules of calcite scattered through the layers, which range 

 from an inch to 6 inches or more in thickness 380 



Fauna : 

 Fragments of fossils. 



2b. Massive bedded, gray limestone that forms a low cliff and 



breaks down readily on gentle slopes 132 



Fauna: 



Ptychoparia. ) „ 



. , y Same as m le. 



Agraulos. j 



2C. Bluish gray limestone, with small concretions and small 

 nodules of calcite scattered through the layers ; a limestone 

 similar to 2a 290 



