MALE.] AEEA B LITTLE BOOK CLIFFS. 177 



Section. 



Base. 



Feet, 



Upper part of ( 1. Black and yellow shales, with lime- ) oaj^ 



Colorado Cretaceous. ( stones f j 



( 2. Yellow sandstone, forming an indis- ) 



tinct escarpment | 



I 3. Yellow shales and sandstones, with y 710 

 Fox Hills Cretaceous. <( a band of lignite near the upper | 



I part , , 3 

 4. Sandstone ) 

 5. Shaly beds ^ 380 



Laramie ? 6. Pinkish sandstones ) 



Total 1, 890 



These beds dip to the northeast at an angle of about 8^. As we trace 

 layer No. 2 toward the northwest along the cliffs it becomes somewhat 

 indistinct. The beds also, as seen from Station 4, appear to sink, and 

 the Laramie sandstones undoubtedly form the escarpment at the sum- 

 mit of the cliffs. Still farther along, the beds rise again. 



East of Station 4 and back of the first line of cliffs a second line is 

 noted, in which the beds are the variegated shales and sandstones of 

 the Wahsatch Group. The sketch in Fig. 3, Plate X, is taken from too 

 low a point to show this line of cliffs. As we approach East Salt Creek 

 the Wahsatch beds come to the front, continuing westward from a low 

 range of hil^s which represent a portion of the Eoan Cliffs. They do 

 not remain in front long, but retreat and form the base of a line of cliffs 

 which extend southwest from Station 28. The latter marks the angle of 

 i bend, a line of cliffs extending southeast from the station. Station 

 :'0 is located on the same line. These cliff's are capped with Green Eiver 

 Tertiary, and are about a thousand feet higher than the outer cliffs, 

 lom which they are distant about six miles. 



The map of Area B will enable the reader to obtain a clearer idea of 

 he extent of the cliffs and the areas occupied by the various formations 

 epresented in them. 



There is room through all this region for much detailed work which 

 he lateness of the season and small amount of time at our disposal 

 prevented us from accomplishing. 



12 G 



