ESCALANTE EILLS. 287 



of tlie range, is here represented in a most complex form, and combined with 

 gentle rounded folds. Owing to inability to explore the region thoroughly, 

 this description may be inaccurate in some of its details, but, in general, it 

 is believed to represent correctly the main outlines. 



The cailon of Lodore, as we have seen, cuts through the main body of 

 the Uinta Range nearly at right angles to its trend, and exposes a section of 

 the southern side of the main anticlinal fold. The general dip of the beds 

 of red sandstone and quartzite at its mouth is about 10° to the southward. 

 In its deepest portion, the walls of the canon are about 3,000 feet in height, 

 and, on the western side particularly, almost vertical. An immense thick- 

 ness of the Weber Quartzite is thus exposed. By calculation from the 

 observed dip and the width of outcrop, on the assumption that in the whole 

 distance there has been no faulting, there would be an aggregate thickness 

 of more than 10,000 feet of strata exposed. The assumption of there being 

 no faulting, however, is not consistent with the structure of the range as 

 observed at other points, though, owing to the uniform character of the 

 strata, it is difficult to determine any well-defined line of fault. .The depres- 

 sion just north of a line drawn from Zenobia Peak to Ute Peak, which is 

 approximately the line of outcrop of the beds of the Upper Coal-Measures 

 which have escaped erosion, would seem to suggest the existence of such a 

 fault at this point. 



Zenobia Peak, the highest point of the Escalante Hills, is capped by 

 the limestones of the Upper Coal-Measures, dipping 10° to the southwest. 

 In these limestones were found some casts of fossils, evidently Carboniferous, 

 but too imperfect for determination. In one of the stream-beds of the south- 

 ern slopes of the Escalante Hills, about 12 miles southeast of Zenobia Peak, 

 were found in these limestones Spirifer Uneatus and Spirifer opimus. The 

 horizon of these fossils is apparently in the lower portion of the Upper Coal- 

 Measure group, but it was impossible to determine at what distance from the 

 bottom of the formation, from the fact that its line of contact with the Weber 

 Quartzite is in a country, where the outcrops are obscured by soil accumula- 

 tions and considerable growth of forest. The section exposed by the Yampa 

 Canon, as seen from its brink, shows beds of massive sandstone, much more 

 heavily bedded than seen in the exposures of the Upper Coal-Measure group 

 elsewhere. In the lower part of the section, the beds have a pinkish color, 



