williamb. 1 DAWSON, BOLL, WALCOTT. 221 



The following table exhibits the essential facts of the paper: > 



Sbinarump conglomerate. 

 Unconformity. 



f Upper gypsiferous and arenaceous shales, marls, and limestones. ..71C feet 

 Unconformity. 



T^fl 1*111 lAill \ 



Lower, chiefly massive limestones = "Pernio-Carboniferous" of 



Gilbert 145 f ee t 



Unconformity. 



Upper Aubrey limestone 835 feet 



Lower Aubrey sandstone 1,455 feet 



Red Wall limestone 1)70 feet 



Unconformity. 



Devonian, sandstone and impure limestone 100 feet 



Mr. G. M. Dawson 2 in 1879 reported : " Between Kainloops and 

 Little Shuswap Lake, on both sides of the South Thompson, rocks be- 

 longing to the Nicola series, with older rocks referable to the Cache 

 Creek group, occur." The occurrence of Fusulina in the Nicola lime- 

 stone series proves it to be of Carboniferous age. This same fossil, 

 along with Foraminifera, named by the author Loftusia Columbia, was 

 found in the limestones of Marble Canon, situated in the section be- 

 tween Lillovet and Bonaparte Biver. 



Mr. Jacob Boll 3 in 1880 reported upon the geology of Texas, saying that 

 the rocks examined appear to be of Permian age, judging by the fossil 

 contents. After giving a description of their mineralogical characters 

 he notes that no coal deposits have yet been found in the Permian. In 

 the south of the Permian region genuine coal is found belonging to the 

 Coal Measures. 



Mr. C. D. Walcott 4 in 1880 gave account of his correlations in the 

 Kanab Valley, Arizona, as follows : 



The Permian rocks are unconformable witb the Shinarump Conglomerate, which 

 is considered as the base of the Mesozoic group. They consist mainly of gypsiferous 

 and arenaceous shales, marls, and limestones, 710 feet in tbickness, called Upper 

 Permian, and 145 feet of Lower Permian, consisting chiefly of massive limestones. 

 The Permo-Carboniferous of Mr. Gilbert is the equivalent of the author's (L. P.) 

 " Lower Permian." 



The Carboniferous rocks here have a total thickness of 3,260 feet, and are sub- 

 divided into three parts, the Upper Aubrey beds (835 feet), the Lower Aubrey (1,455 

 feet), and the Red Wall limestone (970 feet). The latter consists mainly of red 

 sandstones, calciferous sandrock, and limestones interstratified witb layers of chert. 



The Devonian beds are made up of sandstones and impure limestones, having a 

 thickness of 100 feet, and are slightly unconformable witb the overlying rocks. 



Mr. C. A. White, 5 during the year 1880, contributed two papers re- 



1 Am. Jour. Sci., 3d ser., vol. 20, page 223. 



2 Dawson, G. M. : Report on explorations in the southern portion of the interior of British Columbia. 

 Geol. Survey Canada ; Report of Progress, 1877-78, 1879, pp. 16-1736. 



• Boll, Jacob : Geological examinations in Texas. Am. Nat., vol. 14, 1880, pp. 684-686. 



4 Walcott, C D.: The Permian and other Paleozoic groups of the Kanab Valley, Arizona. Am. 

 Jour. Sci., 3d ser., vol. 20, 1880, pp. 221-225. 



•Remarks upon certain Carboniferous fossils from Colorado, Arizona, Idaho, Utah, and Wyoming, 

 and certain Cretaceous corals from Colorado, together with descriptions of new forms, by C A. White 

 V. S. Geologicaland Geographical Survey of the Territories, F. V. Hayden, Bull. vol. 5, 1880, pp. 209, 221. 



The subject of the Permian formation in North America, (Abstract.) Washington Phil, Spp. Bull., 

 vol 3, pp. 104-105. By C. 4- White. 



