102 



T. W. Stant07i — Stratigraj)hic Position 





B 2. 



P50 



It seems to have 

 ^ been assumed by 

 Z most of the geolo- 

 | gists who have visit- 

 •_! ed this locality that 

 •= the beds above enum- 

 S erated are in their 

 £ natural order of se- 

 .p quence beginning 

 2 with the oldest, and 

 § this assumption was 

 j i n accordance with 

 Sail the facts then 

 J> known. They found 

 . -g all the strata in the 

 £>-g section, with a few 

 ^ exceptions that have 

 been considered un- 

 important, practical- 

 ly conformable ; that 

 i s they are nearly 

 vertical and those at 

 a | the east end contain 



s -S well recognized Cre- 

 te cq " 



§ a taceous fossils, while 

 § „- those at the west end, 

 m g composing the Bear 

 "'-§ River formation, are 

 % m n 1 1 e d with species 

 ^ that were originally 

 § described as Tertiary 

 S on account of their 

 J modern aspect and 

 •& their resemblance to 

 § certain European Eo- 

 o cene forms. Later 

 '% the strata were re- 

 £> garded as probably 

 M Cretaceous by Pro- 

 s f essor Meek and 

 ~ others, but their orig- 

 •J inal reference to the 

 J> Tertiary was tacitly 

 accepted as proof 

 that they must be later than the marine Cretaceous beds in 

 the neighborhood. This circumstance and the uncertainty as 

 to the exact age of the marine Cretaceous strata have had 

 great influence in preventing a correct interpretation of facts 

 observed. 



