146 GEOLOGICAL SURVEY OF THE TERRITORIES. 



Bitter Creek series — Continued. 



Locality. 



Description of strata. 



Ago. 



Authority. 



Reference. 



« 





Fossils above a 

 coal-bed, Creta- 

 ceous. 



Lower Miocene 





Do., p. 375. 



Supplement to Fifth 

 Annual Report 

 1871, U. S. Geol. 

 Survey. 



Report U. S. Geol. 

 Survey, 1872, pp. 

 455-459. 



Do., p. 4G1. 



Do., p. 532. 



Do., pp. 410-417. 

 Report U. S. Geol. 

 Survey, 1873, p. 366. 



Do. 





Soft, light - yellow- 

 ish, lead-gray, and 

 whitish sand- 

 stones, with seams 

 and beds of vari- 

 ous-colored clays, 

 shale, and coal. 



Lesquereux . . . 



Buttes, Rook 

 Springs, and Hall- 

 ville. 



Aside from the 

 D in o saurian 

 the organic re- 

 mains favor the 

 conclusion that 

 it (Bitter Creek 

 series) is Ter- 

 tiary. 



Same age as at 

 Hallville ? 



Lower Eocene 



American Lower 

 Eocene. 



...do..-.. 



Bannister 



Lesquereus .. 

 ...do 



beds. 









ville, and Rock 

 Spring. 

 Point of Rocks, Rock 

 Creek, and Medi- 

 cine Bow. 





do 



Alternating beds of 

 hard and soft sand- 

 stones, with argil- 

 laceous and car- 

 bonaceous strata. 



Cretaceous 



American Lower 

 Eocene. 





Do., pp. 434, 435-139. 



westward, Rock 

 Spring, Point of 

 Rocks. 



Lower Lignite of 

 Black Buttes. 



Lesquereux... 





Sciences and Arts, 

 vol. vii, June, 1874. 





WasTcaMe group. 







Locality. 



Description of strata. 



Age. 



Authority. 



Reference. 



Between Creston and 

 Bitter Creek. 



Fresh- water beds 

 with somo seams of 

 impure lignite. 



Laminated chalky 

 clays ; somber, hard, 

 indurated, rusty, 

 arenaceous clays. 



Indurated arenace- 

 ous clays. 



Middle Tertiary.. 



Upper part may be 

 an extension of 

 the Bridger 

 group or synchro- 

 nous with it. 



Middle Tertiary . . 



Washakie group.. 



Hayden 



do 



Report U. S. Geol. 



Survey, 1867-'68- 



'W, p. "190. 

 Report U. S. Geol. 



BarrelSprings, and 

 at .Barrel Springs. 



Above ooal-beds near 



Black Buttes. 



Beds above coal-beds, 



west of Separation 



and extending to 



the high hills of 



: Bridger Pass, from 



the Seminole and 



•Sweetwater ranges. 



At Separation, and 



westward from 



-Separation above 



coal-beds. 



....do 



do 



Survey, 1870, p. 73. 



Do., p. 71. 

 Do., p. 139. 





....do 



Do., p.164. 



Do., pp. 298, 299. 

 Report U. S. Geoi. 

 Survey, 1871,p. 306. 

 Do. 





Fossils Miocene. . . 

 Fossil plants, 

 Upper Miocene. 

 Fossil plants, 

 (Washakie group,) 

 Lower Miocene. 









Lesquereux. . 

 ....do 





....do 



Report U. S. Geol. 



Survey, 1872, pp. 



410-417. 

 Do., p. 457. 

 Do., p. 525. 



U. S. Geol. Survey 

 Reports, 1873, p. 366. 









Separation to Bitter 

 Creek. 



Upper Tertiary . . . 

 Middle Miocene . . 



Lesquereux... 





