448 DESCEIPTIVE GEOLOGY. 



the main crest, while all the beds have a general inclination southward. 



About midway between Ophir City and the forks, a branch-canon from the 



south, by which the road to Lewiston passes, discloses a bed of soft black 



argillaceous shales, which follow the line of depression between the two 



caiions. From about this horizon, in Ophir Canon, were obtained some 



specimens of Spirifer opimits. About a mile above this point were found, 



near the forks: 



Productus Prattenianus. 



Spirifer opimus. 



Naticopsis, new sp. 



From the head of the canon, near the divide, were obtained: 



Streptorliynclms robusta. 

 Clionetes granulifera. 

 Spirifer opimus. 

 Rhynclionella Osagensis. 



The crest of the range between East Canon and North Canon is made 

 up of limestone, with intercalated beds of sandstone and quartzite, resem- 

 bling lithologically those of Timpanogos Peak, and abounding in excellent 

 impressions of Productus Prattenianus and Spirifer opimus. These beds all 

 dip at a very slight angle to the westward; the main ridge, from here north 

 to the head of Tooelle Caiion, forming apparently the western member of 

 an anticlinal fold. Korth Canon cuts into the centre of this fold; but, as no 

 fossils were obtained from this canon, it is not known whether the Sub- 

 Carboniferous and Devonian beds are here exposed or not. 



From beds on the same line of strike to the southward, near Camp 

 Floyd, the following fossils were obtained by J. E. Clayton: 



Orthis carhonaria, 

 StreptorJiynchus crassus, 

 Productus Prattenianus, 

 Productus multistriatus, 



which, however, only indicate a Lower Coal-Measure horizon, and re-affirm 

 what the stratification-lines have already shown, that the beds gradually 

 sink as a whole to the south of Lewiston Peak. 



