RESUME OF LITERATURE. 41 



Wasatch Mountains; and it seems to me, therefore, that King's correlations of the 

 Wasatch Mountain and Nevada sections are not to be relied upon. 



The facts at hand seem to indicate that the Ute limestone is probablj^ of Ordo- 

 \acian age; the Ogden quartzite De^'onian or older; the Wasatch limestone ]\Iississip- 

 pian in its lower portion, with more than half above Pennsjdvanian; the Weber 

 quartzite and overl3'ing limestones Pennsylvanian. More recent collections taken 

 from the Permo-Carbonif erous of King have introduced an uncertainty^ as to whether 

 this series is really Permian or Mesozoic. The component formations of the 

 Wasatch Mountain section have not all the same distribution, for in Rock Canj-on, 

 back of Provo, I found Waverl}' fossils at the base of the Wasatch limestone only 

 a few hundred feet above thin blue limestones carrying Middle Cambrian trilobites. 



King describes the Paleozoic formations of the Uinta Mountains in the following- 

 terms:" 



"1. A series of siliceous beds 12,000+ feet thick, impure sandstones at the east 

 end of the uplift, but graduallj^ compacted into quartzite in the western portion of 

 the range; these beds are intercalated with groups of clay shales and occasional 

 conglomerate sheets which contain round rolled Archean pebbles. 



•' -2. Conformably, as we believe, over No. 1 is a series 2,000 to 2,500 feet thick 

 of mixed limestone, calcifei'ous sandstones, and cherty limestones, showing great 

 variabilitj' in the thickness of bedding, but prevailingly of heavy limestone near the 

 base, with varjang thin-l)edded intercalations of lime and sand near the top, always 

 capped with a zone of highh- cherty B<'/le/vj)/ion-hea.viBg limestones. From bottom 

 to top the series is rich in Upper Coal Measures fossils. 



'' 3. From 200 to 500 feet of calcareous shales and argillaceous rocks and clays 

 intervening betw.een the Coal Measures and Trias, conformable to both, and carrying 

 Permo-Carbonif erous fossils. " 



The first paragraph of the preceding quotation refers to the great thickness of 

 beds to which Powell gave the name Uinta sandstone. This Emmons traced west- 

 ward and identified with the Weber (juartzite of the Wasatch Range, and the name 

 Weber formation is therefore frequently employed to designate it. In the second 

 paragraph are collectively described l)eds which are discriminated by Powell as the 

 Lodore group, the Red Wall group, the upper Auljrey group, and the lower 

 Aubrey group. King frequently refers to this division under the name of the Upper 

 Coal Measure limestone. The upper series described by King in the third paragraph 

 must be the lower portion of Powell's Shinarump group. These two divisions are 

 evidently supposed bj" King to represent the Upper Coal Measures and Permo- 

 Carboniferous of his Wasatch Mountain section. 



Several points of disagreement appear Avhen the account by Powell of the geol- 

 ogy of the Uinta Mountains is compared with the review by King of the same subject. 

 One of these is the reference by the latter of a part of Powell's Shinarump group to 



(I U. S. Geol. Expl. 40th Par., Rept., vol. 1, 1878, p. 1.53. 



