106 T. Jr. Stanton — StratigrctpMc Position 



Coarse gray sandstone. Dip 85° east 6 ft. 



Bluish and reddish shales 75 ft. 



Total* 1591 ft. 



5. Bear River Formation. 



Brown sandstone. Dip 75° east 20 ft. 



Soft gray shales 25 ft. 



Gray sandstone 10 ft. 



Dark shales , 60 ft. 



Brown sandstone 10 ft. 



Dark shales with calcareous bands containing numerous 

 fossils — Pyrgullfera humerosa, Corbula piriformis, 

 Unio helliplicatus, etc. . _ 250 ft. 



Sandstone . 10 ft. 



Dark shales with thin bands of limestone, and sandstone 

 and occasional carbonaceous seams ; many Bear River 

 fossils 400 ft. 



Gray sandstone. Dip 75° east 10 ft. 



Soft shales. 25 ft. 



Gray sandstone. Dip 75° east ... 20 ft. 



Total - 840 ft. 



6. Colorado Formation. 



Bluish fissile shales with many fish scales and a few 



marine Cretaceous invertebrates, exposed about 500 ft. 



The space for about half a mile west shows only a few small 

 exposures of shales. At this point an opening has been made 

 on a bed of coal six feet thick and dipping 75° east. This is 

 doubtless the same coal bed as that which occurs at Millis 

 station. The associated strata are concealed by soil and by 

 debris from the horizontal Wasatch beds that cap the adjacent 

 ■ hills. 



East and north of this section, in the area between the ridges 

 indicated on the foregoing map, there is a valley in which there 

 are no exposures excepting around its margin. On the east 

 side, as has already been mentioned, the Cretaceous sandstones 

 with a strong eastward dip are underlain by 1000 to 1500 feet 

 of shales with fish scales, Cardium paupercuhim, etc., that are 

 the equivalent of the shales overlying (west of) the principal 

 exposures of Bear River beds. It will be noticed that these 

 shales do not appear in the section on Sulphur Creek between 

 the eastern belt of the Bear River formation and No. 12. The 

 latter which is evidently not in its normal posture, seems to 

 have been thrust over on the shales thus concealing them. A 

 short distance north of the section the divergent strike of the 

 two formations gives ample room for the shales though they 

 are not exposed. 



* It is probable that a large part of this member of the section belongs to the 

 Bear River formation. 



