120 



VERTICAL SECTION— Continued. 



Subdivisions. 



LocAunES. 



Very fine yellow calcareous sand, not 

 differing very materially from Bed D, with 

 numerous layers of concretions and rarely 

 organic remains, passing down into a va- 

 riegated bed, consisting of alternate layers 

 of dark brown clay and light grey calca- 

 reous grit, forming bands, of Avhich I 

 counted twenty-seven at one locality, vary- 

 ing from one inch to two feet in thickness. 



White river. Bear creek. 

 Ash Grove spring, head of 

 Shyenne river. Most con- 

 spicuous near White river. 



A deep flesh colored argillo-calcareous 

 indurated grit ; the outside, when weath- 

 ered, has the appearance of a plastic clay. 

 Passes down into a gray clay, with layers 

 of sandstone ; underlaid by a flesh colored 

 argillo-calcareous stratum, containing a 

 profusion of mammalian and chelonian 

 remains. Turtle and Oreodon Bed. 



Light gray fine sand, with more or less 

 calcareous matter, passing down into an 

 ash-colored plastic clay, with large quanti- 

 ties of quartz grains disseminated through 

 it, sometimes forming aggregated masses 

 like quartzose sandstone cemented Avith 

 plastic clay ; then an ash-colored clay with 

 a greenish tinge, underlaid at base by a 

 light gray and ferruginous silicious sand 

 and gravel, with j^inkish bands. Immense 

 quantities of silex in the form of seams all 

 through the beds. Titanotherium Bed. 



Cretaceous beds 5 and 4, with their 

 usual lithological characters and fossils. 



Old Woman's creek, a fork 

 of Shyenne river ; also on the 

 head of the South Fork of the 

 Shyenne ; most conspicuous 

 on Sage and Bear creeks, and 

 at Ash Grove spring. Well 

 developed in numerous local- 

 ities in the valley of White 

 river. 



Old Woman's creek ; also 

 in many localities along the 

 valley of the South Fork of 

 Shyenne. Best development 

 on Sage and Bear creeks. 

 Seen at several localities in 

 the valley of White river. 



Exposed underneath the 

 tertiary beds on the South 

 Fork of Shyenne and its 

 southern branches, also in 

 White river valley near its 

 source. 



