104 T. W. Stanton — Strati graphic Position 



duplication of the Bear River shales had been caused by a 

 simple fold. This part of the series and the overlying beds 

 are more fully exposed in the section on Stowe Creek, which 

 will be described. The beds in space JSTo. 27 are very much 

 disturbed and only slightly exposed. Besides the nearly hori- 

 zontal outcrops of sandstone figured by Prof. Meek there are, 

 a. short distance east of the fossiliferous No. 28, two almost 

 vertical bands of gray sandstone containing fragments of dicoty- 

 ledonous leaves, while the outcrops 200 yards north show 

 similar sandstone dipping 45° west. It will be seen on exam- 

 ining the corresponding part of the Stowe Creek section that 

 this confused condition as well as the apparent fold in No. 28 

 are purely local, the only movement there indicated being a 

 slight change in dip. 



On the direct line of Meek's section there are no more 

 exposures for a long distance because it passes into the valley 

 of Sulphur Creek and thence down through the meadows on 

 Bear River. But following the strike of ISTo. 28 less than half 

 a mile north-northeast it was found that the fossiliferous Bear 

 River shales are succeeded westward by thin beds of gray 

 sandstone (about 60 feet) and these by bluish and brownish 

 fissile shales, of which about 1000 feet are exposed, containing 

 numerous teleost fish scales. The strata are then covered for 

 one-fourth of a mile or more to Millis Station where there is a 

 tunnel on a nearly vertical bed of coal six feet thick. The 

 associated beds are' not exposed and the hills a short distance 

 northwest are composed of horizontal Wasatch strata. 



In the same way the Bear River shales were followed along 

 the strike south-southwest for two miles from the line of the 

 section and were there found to underlie the high hill on the 

 east bank of Bear River. At this most southern exposure 

 there is a covered space of about 500 feet in the meadows along 

 Bear River. The hills on the west bank show some thin bands 

 of sandstone followed by several hundred feet of bluish and 

 brownish shales with teleost fish scales and crushed specimens 

 of a Prionocyclus (perhaps P. Woolgari). These are evidently 

 the same as the beds above mentioned lying west of the Bear 

 River shales and belong to the lower part of the Colorado for- 

 mation. A few hundred feet northwest of this locality there 

 is an exposure of 145 feet of alternating sandstones, shales and 

 carbonaceous layers with Colorado Cretaceous fossils. The 

 dip is about 80° northwest, the same as that of the other beds 

 just mentioned. On the uneven edges of this most westerly 

 outcrop of the Cretaceous are the horizontal clays and sand- 

 stones of the Wasatch Tertiary. Several years ago Dr. White* 

 gave a list of species collected at this point and referred them 

 to the Fox Hills group. All the identified forms also occur 



*llth Ann. Kept. U. S. Geol. Surv. Terr, p. 248. 



