SOUTHERN FLANKS OF THE UINTA RANGE. 305 



dominate, and from one of the latter beds were obtained the following 

 Permo-Carboniferous fossils: 



Bdkevellia parva. 



Myalina (like the young of M. suhquadrata). 



PleuropJiorus (like P. ohlongus). 



Myalina, sp.? . 



Macrodon, spJ ■ 



These fossils present almost the only decided palseontological evidence 

 of the existence of this formation in the Uinta Range, though it has been 

 designated by a color, wherever the underlying and overlying groups are 

 represented in juxtaposition on the map. 



Above the bend, at Beaver Lake, as already mentioned, the canon runs 

 approximately in the strike of the beds, which, for a few miles up, are the 

 limestones and sandstones of the Upper Coal-Measure group ; in these beds 

 on the west side of the canon, just above the lake, was observed a short 

 secondary roll, making a partial S-curve in the stratification-lines. Such 

 secondary rolls, or crumples, in the southern member of the great anticlinal 

 fold, are doubtless more common than can be actually proved by observa- 

 tion, and may account for the great width of outcrop which, especially in 

 the Upper Coal-Measure limestone, is often larger than the angle of dip 

 observed and their known thickness would warrant unless such inter- 

 mediate flexures existed. 



In ascending the western ridge from the lake to its summit. Point 

 Carbon, so called, as being the highest point where Coal-Measure fossils 

 were found, many isolated outcrops of light-colored limestone beds were 

 crossed, dipping southward at generally low angles. The summit of this 

 outlying peak, which is 11,443 feet above sea-level, is formed of a dark- 

 bluish thinly-bedded limestone, dipping 25° south. These beds jaelded 

 some fossils, of distinctly Coal-Measure type, Prodiidus and Spirifer, but 

 which were not sufficiently well preserved for specific determination. Im- 

 mediately under this limestone is a coarse-grained white sandstone, made 

 up of large rounded grains of quartz similar to that noticed at the base of 

 the Upper Coal-Measure group on Black's Fork. Following the ridge 

 20 D G 



