. Report of the geological exploration of the fortieth parallel . ard and throughthe main body of 0-wi-yu-kuts Plateau the sandstones approach a nearlyhorizontal position. On the cliffs overlooking Browns Park, at the canonof Beaver Creek, for instance, they dip 5° to the north. These cliffsbordering the noithern side of Browns Park nse rapidly about 1,800 feet,displaying the edges of the series. They are usually formed of a red,indurated sandstone tending to quartzite, and along their southern margin,especially toward the eastern opening of Browns Park, the loAver bedsbend over into a souther
. Report of the geological exploration of the fortieth parallel . ard and throughthe main body of 0-wi-yu-kuts Plateau the sandstones approach a nearlyhorizontal position. On the cliffs overlooking Browns Park, at the canonof Beaver Creek, for instance, they dip 5° to the north. These cliffsbordering the noithern side of Browns Park nse rapidly about 1,800 feet,displaying the edges of the series. They are usually formed of a red,indurated sandstone tending to quartzite, and along their southern margin,especially toward the eastern opening of Browns Park, the loAver bedsbend over into a southern inclination, the extreme examples dipping 8° tothe south. Following- northward, the beds curve over into a position offrom 50° to 60° to the north. Tlie relation of the less steeply dippingbut geologically superior Upper Coal Measure series of Diamond Creekis considered to he explained by the downthrow of the gently inclinedlimestone strata into contact with the underlying sandstones. An appar- * Geology of the Uinta Mountains, 1876. H :A. PLA].L,. INTA RANGE PALJSOZOIC EXPOSCTRES. 149 ent nonconformity here, in ii region of evident dislocation, has no bearingupon the actual conformity of the two series. Minor dislocations in the0-wi-yu-kuts sandstones themselves suggest caution in estimating the thick-ness of the beds. As estimated by us, there are exposed here about 10,000feet of the Weber series, for the most part of heavil}^ bedded, rusty yel-low or red, sometimes grayish, compact sandstones, with limited passagesof actual quartzite. The general color of the exposure, either in thecanons or upon the bold walls fronting Browns Park, is a dark, earthy,purplish red. The surface of the eastern end of 0-wi-yu-kuts Plateau isseen to be ribbed by the edges of the gently inclined sandstone strata,which have a strike much more east-and-west than the overlying Carbon-iferous series to the east. These parallel ribbed outcrops of the sandstoneseries extend up close under
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