KANAB SEOTION. 



•Jifi 



the tliickiK'ss wliicli has <>-eiU'rally been assig-ued to them in th(^ Wasatcli, 

 are Hmited to 500 feet. It will be seen, therefore, that the upper and lower 

 portions of the section as exposed in the Wasatch, on the edge of the 

 Great Basin, are wanting in the Eureka section. Taking out the 12,000 

 feet of Camlirian at tlie base and 2,000 feet of Permian and Up^^er Coal- 

 measures from th(* sunniiit of the Wasatch sections, there remaius 1G,000 

 feet of stnvta, which, from the base of the Prospect Mountain limestone to 

 the top of tlie series, are represented in the Eureka section bv the enor- 

 mous developiuent of 2S,o00 feet of sediments. 



Mr. C. i). Walcott' constructed a section across the entire series of 

 Paleozoic rocks as exposed in the Kauab Valley of the Lower Colorado 

 in the plateau province. This sei-tion presents 5,000 feet of beds from the 

 Canil)rian to the Permian inchisive, and is republished here as it offers so 

 much that is of interest in a stud\' of the Paleozoic rocks of the Cordillera. 

 Kanah section, Arizona: SjOOO/eet. 



Note.— Planes of unconformity by erosion denoti^d by double dividing lines. 

 Am. .lour. Sci.. Sept., 1880. 



