GEOLOGICAL SURVEY OF THE TERRITORIES. 



451 



w 



Q 



SECTION OF THE ROCKS EXPOSED ON SULPHUR CREEK, NEAR BEAR 



RIVER, WYOMING. 



1 Ft. In. 

 No. 1. — Black sliale, only seen in bottom of Sul- 

 phur Creek, thickness unknown. 



No. 2. — Slope apparently occupied by clays, 

 -* thickness perhaps 100 feet or more 100 



, No. 3. — Soft light grayish sandstone, nearly 



Yertical DO 



" «, No. 4. — Co Yered space, "probably occupied by 

 clays, but showing some sandstone that 

 may or may not be in place; perhaps room 

 enough for 250 to oOO feet 300 



<^ No. 5. — Two or three rather heavy beds of light 

 yellowish gray sandstone, separated by 



• ~ clays, probably occupying some of the space 

 included in division 4. Near the lower part 



~ two layers 15 to 18 inches each, of sand- 

 stone, containing Ostrea solenisciis, Trap- 



2 eziuni micronema, &c. Altogether 90 to 100 

 or more ' 100 



No. 6. — Greenish and bluish gray sandy clays, 



:2 with some dark shale at places 100 



No. 7. — Bed of good coal, said to be 7J feet in 



thickness T 7 6 



2; No. 8. — Heavy massive bed of light colored 

 2 sandstone, about 90 feet in thickness, staud- 



H ing nearly vertical, with some 3 to 5 feet 

 ~ of sandy clay between it and the coal of 



division 7 95 



^ No. 9. — Gray sandy shales with alternations of 



sandstone and clays 255 



o No. 10.— Light gray sandstone 20 



sNo. 11. — Slope and unexposed space, perhaps 

 g3 200 yards or more across. 

 ^ No. 12. — Light gray sandstones and clays, in- 

 " eluding a bed of good coal, said to be 7^ 

 feet in thickness ; all dipping south-south- 

 east 550 below horizon ; and th^ sandstone 

 '"' above the coal containing many casts, Inoc- 

 eramus proMematiciis, with a few casts of 

 C«n?iMm and undetermined univalves; al- 



.^ together showing about 150 



■' No. 13. — A valley or depression showing no 

 rocks, perhaps 150 yards across. 

 No. 14. — Ferruginous sandstone in thin layers, 

 dipping north-west about 80° below "hori- 

 zon 40 



- No. 15. — Bluish laminated clays with, at top, 

 (left or west side,) a two-foot layer of sand- 

 stone, containing fragments of shells not 



seen in a condition to be determined 125 



No. IG. — Clays and sandstone below, (20 feet;) 

 " gray and brown pebbly sandstone above, 



(25 feet) 45 



