CAMBRIAN CORDILLERA N SECTIONS — WALCOTT 209 



ELDON FORMATION (continued): 



ic (continued) : Feet 



Two yellowish buff weathering bands of limestone 2 to 3 feet 

 thick stand out in color on the face of cliffs. 



Fauna (near the summit) : 

 BilUngsella ? 

 Neolenus-Wkt pygidium. 



id. Massive bedded limestone much like that of ic 71 



Total of 1 788 



2. Thin-bedded, bluish gray limestone with irregular layers and 



stringers of gray, buff weathering, dolomitic limestone 95 



At 24 feet from the base a shaly, bluish gray, siliceous lime- 

 stone about two feet thick is interbedded. 



Fauna (in shaly limestone) : 



Obolus membranaceous Walcott [1908c/, p. 61]. 

 Lingulella sp. 



Isoxys argentea (Walcott) [1886, p. 146]. 

 Ptychoparia, 2 species. 



3. Massive bedded dark gray arenaceous limestone igo 



4. Massive bedded, cliff-forming, light gray arenaceous lime- 



stone. At several horizons bands of thinner layers from a 

 few feet up to 30 feet in thickness occur. One of these 480 

 feet from the base forms a slight terrace 1,655 



Fauna: 



In the Mount Stephen section seven miles southwest of 

 Mount Bosworth, at a horizon about 700 feet above the 

 base of this limestone, the following fossils have been 

 recognized : 



Protospongia (spicules). 



Lingulella of. isse (Walcott) [1905, p. 330]. 



Hyolithes sp. 



Agnostus cf. mantis Matthew [1899, p. 43]. 



Zacanthoidcs spinosus Walcott [1884, p. 6^,]. 



Ptychoparia sp. 



Bathynriscus sp. 



Ogygopsis sp. 



Total of Eldon formation 2,728 



STEPHEN FORMATION [Walcott, 1908a, p.3] : 



I. Thin-bedded, dark gray and bluish black limestone 315 



Fauna : 



Micromitra (Patcrina) stissingensis (Dwight) [1889, p. 



145]. 

 Obolus mcconiiclli (Walcott) [1889, p. 441]. 



