146 



GEOLOGICAL SURVEY OF THE TERRITORIES. 



Bitter Creek series — Continued. 



Locality. 



Description of strata. 



Ago. 



Authority. 



Reference. 







Possils above a 

 coal-bed. Creta- 





Do., p. 375. 













ceous. 











Lower Miocene ... 



Lesquereux . . . 



Supplement to Fifth 

 Annual Report 

 1871, TJ. S. Geol. 

 Survey. 



Point of Rocks, Black 



Soft, light -yellow- 



Tertiary 



Meek . . . 



Eeport TJ. S. Geol. 

 Survey, 1872, pp. 



Biittes, Eock 



ish, lead-gray, and 







Springs, and Hall- 



whitish sand- 







455-459. 



ville. 



stones, with searas 

 and beds of vari- 

 ous-colored clays, 

 shale, and coal. 













A side from the 



...do 



Do., p. 4G1. 







Dinonaurian 











the organic re- 











mains favor the 











conclusion that 











it (Bitter Creek 











series) is Ter- 







Point of Rocks coal- 





Samo ase as at 



Bannister 



Do., p. 532. 



beds. 





Hallville? 







Black Buttes 





Lower Eocene 



Lesnuereux .. 



Do., pp. 410-417. 



Black i uttes, Hall- 





American Lower 

 Eocene. 



....do 



Eeport U. S. Geol. 

 Survey, 1873, p. 3G6. 



ville, and Eock 







Spring. 











Point of Rocks, Eock 







do 



Do. 



Creek, and Medi- 











cine Bow. 











Black Buttes, and, 



Alternating beds of 

 hard and soft sand- 







Do., pp. 434, 4.35-439. 



westward, Eock 







Spring, Point of 



stones, with argil- 









Eocks. 



laceous and car- 

 bonaceous strata. 









Lower Lignite of 

 Black Buttes. 







Lesquereux . . . 







Eocene. 



Sciences and Arts, 











vol. vii, June, 1874. 



WasTialiie group. 



Locality. 



Description of strata. 



Age. 



Authority. 



Eeference. 



Between Creston and 

 Bitter Creek. 



Fresh-water beds 

 with some seams of 

 impure lignite. 



Laminated chalky 

 clays ; somber, harci, 

 indurated, r u s ty, 

 arenaceous clays. 



Indurated arenace- 

 ous clays. 



Middle Tertiary.. 



Upper part may be 

 an extension of 

 the Bridge r 

 group or synchro- 

 nous with it. 



Middle Tertiary .. 



"Washakie group.. 



Hay den 



....do 



Eeport U. S. Geol. 



Survey, lS67-'68- 



'1.9, p. '190. 

 Eeport U. S. Geol. 



Barrel Springs, and 

 at Barrel Springs. 



Above coal-beds near 

 Black Buttes. 



....do 



do 



Survey, 1870, p. 73. 



Do., p. 71. 

 Do., p. 139. 



west of Separation 

 an d extending to 

 the high hills of 

 Bridgef Pass, from 

 the Seminole and 

 Sweetwater ranges. 

 At Separation, and 

 westward from 

 -Separation above 

 coal-beds. 





....do 



Do., p.l64. 



Do., pp. 298, 299. 

 Eeport U. S. Geoi. 

 Survey, 1871, p. 306. 

 Do. 





Fossils Miocene... 

 Fossil plants, 

 Upper Miocene. 

 Fossil plants, 

 (Washakie group,) 

 Lower Miocene. 



Meek 







Lesquereux. . . 

 .do 





....do 



Eeport U. S. Geol. 









SurvoY, 1872, pp. 



410-417. 

 Do., p. 457. 

 Do., p. 525. 



Separation to Bitter 

 Ureek. 



Upper Tertiary . . . 

 Middle Miocene . . 



Bannister 



Lesquereux... 





U. S. Geol. Survey 

 Reports, 1873, p. 366, 



