KANAB SECTION. 



207 



the thickness which has generally been assigned to them in the Wasatch, 

 are limited 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 Cambrian at the base and 2,000 feet of Permian and Upper Coal- 

 measures from the summit of the Wasatch sections, there remains 16,000 

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

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

 mous development of 28,500 feet of sediments. 



Mr. C. D. Walcott 1 constructed a section across the entire series of 

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

 in the plateau province. This section presents 5,000 feet of beds from the 

 Cambrian to the Permian inclusive, and is republished here as it offers so 

 much that is of interest in a study of the Paleozoic rocks of the Cordillera. 



Kanab section, Arizdha: 5,000 feet. 



NOTE. Planes of unconformity by erosion denoted by double dividing lines. 

 : Ain. Jour. Sci.. Sept., 1880. 



