152 GEOGRAPHIC DISTRIBUTION. 



SECTION OF THE JURA TRIAS GROUPS. 

 FLAMING GOEGE GROUP. 



No. 1, 110 feet. Gray, greenish gray, pink, purple, and chocolate 

 beds ; very friable ; bad -land beds. 



No. 2, '200 feet.- Bluish-gray limestone; Mid-Group Limestone. 



No. 3, 500 feet. Coarse red sandstone ; (unio beds.) 



No. 4, 250 feet. Limestone; bluish-buff; compact; sometimes slialy 

 and interstratified with orange shales and thin beds of gypsum. 



WHITE CLIFF GROUP. 



No. 5, 1,025 feet. Massive sandstone ; light gray and light orange, 

 everywhere exhibiting false stratification in many directions and at many 

 angles. 



VERMILION CLIFF GROUP. 



No. 6, 300 feet. Sandstone ; massively bedded ; gray, drab, and brown 

 within, but weathering with bright vermilion surfaces ; well exposed on the 

 summit of Flaming Gorge. 



No. 7, 6 feet. Shales, somewhat argillaceous. 



No. 8, 359 feet. Sandstones ; rather friable, with intercalated shales ; 

 the latter containing much gypsum ; weathering in variegated blight colors. 



SHIN^.RUMP GROUP. 



No. 9, 1,095 feet. Shales and sandstones containing much gypsum; 

 weathering in many colors, but brown and chocolate tints prevailing; in 

 many places constituting bad-land beds. 



These beds all dip to the north at a great angle. 



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It will be seen that the Jura Trias groups are exposed in outcrops on 

 the north side of the Uinta Mountains in isolated patches, and these out- 

 cropping beds in the Flaming Gorge district dip to the northward. In the Po 

 Canon district they dip in a direction a little north of east. These two areas 

 of outcrop are separated by a long space where these groups are carried down 

 by the great Uinta fault, and their non-appearance at the surface is due 



