40 CAKHONIKKROl'S FORMATIONS AND KAUNAS OF COLORADO. 



aiul .stutenieiilti .sot forth in this \'(j1uiiil' tuicl in (iu: rt'suuu'' by Kinj;' of tiic results 

 iu systematic g-eology of the work of this survey" published the year later, so far 

 as thej' arc in agreement. 



The work of the Fortieth Parallel Survej^ cml)raced a strip of territory adjacent 

 to the fortieth parallel of north latitude, including considerable areas in northern 

 Colorado and Utah. Here are dealings, not only with the eastern portion of the 

 Uinta Mountains, which Powell described, but also with their western extension, 

 which he had not carefully studied (Powell, p. 61), and of the Wasatch Range, which 

 adjoins them on the west. 



The section of the Wasatch Mountains which King- uses as a reference section 

 consists of the following formations:'' 



Section of Wasatch Mountairni. ' ^ 



Feet. 

 Permo-Carboniferous 6.50 



Upper Coal Measures 1, 700-r2, 100 



Weber quartzite 5,000-6,000 



Wasatch limestone 7, 000 



Ogden quartzite , 1, 000-1, 500 



Ute lime.stone 1, 000-2, 000 



Cambrian shales 75-600 



Cambrian quartzite 12, 000 



Lower Cambrian slates 800 



The Ute limestone is reported as containing Quebec fossils. The Ogden quartzite 

 has as yet furnished no fossils, but is referred to the Devonian on the strength of 

 correlation with sections farther west, where its supposed equivalent is defined by 

 f ossilif erous horizons above and below. The Wasatch limestone is reported as having 

 Devonian form, in the lower j)art, with Waverly fossils above and Coal Measure 

 faunas running aown to 1,600 feet above its base. The Devonian species cited in the 

 Wasatch Mountains are, however, few,'' and occur also in the Waverly fauna. I 

 have never seen any Devonian fossils from the Wasatch Mountains, and in one case 

 at least (Eock Canyon, back of Provo) the verj^ basal beds of the Wasatch limestone 

 carry a Waverly fauna. Thei'e seems to me, therefore, to be no evidence for 

 I'eferring any portion of the typical Wasatch limestone to the Devonian. Farther 

 west, however, in Nevada, in the Tucubits, White Pine, and other ranges, abundant 

 and well-marked Devonian faunas are found, but the limestones in which they occur 

 are evideutlj' not the Wasatch limestone, but another formation underlying it, which 

 is not found in the Wasatch section. From the Ruby and Egan mountains-' faunas 

 are cited as from the Wasatch limestone which have a peculiar facies that is believed 

 to be distinctive of the limestones which come above the Weber quartzite in the 



« U. S. Geol. Expl. 40th Par., Kept., Tol. 1, 1878. c Streptorhynchits insequale and Proetus peroccMejis, ibid., p. 177, 



6 Ibid., p. 155. dibid., p. 203. 



