PALEOZOIC SECTIONS. 



57 



In the following tables are given the average Paleozoic section in the 

 Mosquito Range, in the Kanab from Mr. C. D. Walcott, 1 and in the 

 Wasatch from the Fortieth Parallel Reports: 



Mosquito section; 4,600 feet; possible unconformity by erosion. 



Carboniferous 

 3,700 feet 



to 

 4,200 feet. 



Upper Coal Measures. 



Weber Grits. 



Weber Shales 



Bine Limestone 



f| Parting Quartzito 



Silurian J ! White Limestone 



200 feet. I j 

 Cambrian Lower Quartzite 



200 feet. 



1,000 



to 

 1,500 



2,500 



200 



40 

 160 



150 

 to 

 200 



Blue and drab limestones and dolomites, with 

 red sandstones and shales. Mud shales at 

 top. 



Coarse white sandstones, passing into conglomer- 

 ates, and silicionsaud highly micaceous shales, 

 witb occasional beds of bliicli argilltto and blue 

 dolomitic limestone. 



Calcareous and carbonaceous shales, with quartz- 

 ite. 



Compact, heavy-bedded, dark-blue dolomitic lime- 

 stone. Silicious concretions at top, in form of 

 black chert. 



White quartzite. 



Light-gray silicions dolomitic limestone, with 

 white chert concretions. 



White qnaitzite, passing into calcareous and ar- 

 gillaceous shales above. 



Kanab (Colorado River) section; 5,000 feet; unconformities by erosion. 



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

 1 American Journal of Science, September, 1680, p. 222. 



