220 THE DEVONIAN AND CARBONIFEROUS. Ibull.80. 



A chart of " Paleozoic subdivisions, Wahsatch and Middle Nevada," 

 is given on page 248, expressing the nomenclature used and the corre- 

 lation. 



Above the Silurian formations the sections were as follows: 



Wahsatcb section. Middle Nevada section. 



Permian, 650 feet, clays, marls, and limestones., (absent) 



Carboniferous, 15,000 feet.. < 



Upper Coal Measures, limestone ..2,000 feet 



Weber quartzite 6,000 feet 



Wahsatcb limestone 7000 feet 



I 



Waverly. 



Devonian, 2,000 feet Ogden quartzite, 1,000 feet 



Fossils were collected from which correlations were made of Devonian, 

 including Upper Helderberg, Chemung, and Genesee horizons in the 

 lower Wahsatch limestone, of Waverly faunas above, and then of Sub- 

 carboniferous forms in the lower 2,200 feet. The upper 4,500 feet were 

 characterized by abundant Coal Measure forms. The Weber quartzite 

 separates the lower from the upper Coal Measure limestone. The upper 

 Coal Measure limestone contains some of the same species seen in the 

 upper part of the Wahsatch limestone, but over 20 species were named 

 that did not occur below the quartzite. " In the Wahsatch and Uinta 

 exposures a series of argillaceous and calcareous shales, with muddy 

 marls, overlying the upper Coal Measure limestones " reached the thick- 

 ness of 650 feet and carried "from summit to base a characteristic 

 Permo-Carboniferous fauna." l The species are Lamellibranchs, several 

 of them identical with Meek's species described in the faunas of Ne- 

 braska and Kansas. 



In 1879, at a meeting of the Philosophical Society of Washington, 

 Capt. C. E. Button announced the discovery of the Permian system in 

 southern Utah. 2 



The discovery was made by C. D. Walcott of well marked Permian 

 fossils in the red sandstone beds at Kanab, southern Utah. The beds 

 were known before, but had not yielded fossils. Heretofore they were 

 regarded as Triassic. In the author's opinion this established the Per- 

 mian age for the lower part of the red beds of Colorado, Wyoming, the 

 Uinta Mountains, and New Mexico, the variegated marls of Newberry 

 in Arizona and New Mexico, and the Shiuarump of Powell (pp. 0, 7). 



Mr. C. D. Walcott published an account of the facts in 1880. 3 



1 Page 245. 



2 On the Permian formation of North America (abstract), Washington Phil. Soc. Bull., vol. 3, pp. 67, 

 68; Smithsonian Miscellaneous Collection, vol. 20. 



3 The Permian and other Paleozoic groups of the Kanab Valley, Arizona. Am. Jour. Sci., 3d ser., 

 vol. 20, pp. 221-225. 



