254 REPORT UNITED STATES GEOLOGICAL SURVEY. 
No. 6. Drab and gray limestone, forming a heavy deposit several hun- 
dred feet in thickness, as seen in cliffs on the south side of the cation. 
No. 7. Buff-gray sandstone, with obliquely-bedded layers, exposed in — 
the lower escarpments, especially on the south side of the canon and in 
adjacent mountain flank, 300 feet +. 
No. 8. Upper Carboniferous limestones and Permo-Carboniferous hori- 
zon, the latter showing at one place in the debouchure of the cafion, 
below: Light-gray, in places, magnesian limestone, 5 to 10 feet exposed ; 
dark-gray, shaly sandstone with silicified fossils, exposed 4 feet; drab 
and dark-gray, compact and porous, thin-bedded limestone, exposed 5 
feet, containing numerous casts of a small Plewrophorus, besides a large 
Bellerophon, &e.; light-gray, thin-bedded cherty limestone. 
No. 9. Triassic ‘“‘red beds,” composed of deep-red shaly sandstones 
and arenaceous shales, and reddish-buff or gray soft sandstone with 
ripple-markings. The exposures in the bluff just without the cation 
show a thickness of several hundred feet (700 to 1,000) of this horizon, 
the strata dipping at an angle of 139, N. 27° to 42° H. 
No. 10. Jura. Variegated pale-reddish and drab deposits, as seen at 
a distance in obscure exposures occurring in grassy Slopes. These 
deposits occupy a wide belt outlying the Triassic “red beds,” and may 
reach a thickness of 1,000 feet. 
No. 11. Cretaceous. Dark-drab (clays), and above light-buff (sand- 
stones and clays) deposits appearing in more or less distinct belts lying 
beyond the preceding, and probably including the Colorado and Fox 
Hills members of the series. 
No. 12. Drab clays, in bluff north side of Little Wind River, just below 
Camp Brown. 
No. 13. Greenish-gray, coarse-grained, rather friable sandstone, with 
layers of reddish-brown weathered firmer sandstone, associated with red- 
dish-drab clays and light-drab indurated clay shales. The above deposits 
outcrop in low, upland declivities to the northeast and 200 feet above 
Camp Brown, where they incline to the northeast at an angle of 30° to 
34°. The sandstone contains partially silicified fragments of fossil wood. 
No. 14. Soft buff sandstone, dip steep to the northeast. 
No. 15. Reddish and drab clays. 
No. 16. Drab fragmentary limestone, 5 feet +, dip 70°, SW. 
No. 17. Red shales and soft sandstone. 
No. 18. Gray and yellowish, cross-bedded, soft sandstone, 50 feet +, 
dip 40° northwestward. 
No. 19. Reddish and drab clays. 
No. 20. Drab fragmentary limestone, exposed 4 feet. 
No. 21. Greenish-gray, reddish-stained, soft sandstone, associated with 
red and drab clays, dip 419, W. 52° N. 
No. 22. Soft, greenish-buff, reddish-stained sandstone, and red arena- 
ceous shales, exposed 50 feet +, dipping gently northeastward. 
No. 23. Gray sandstones, as seen at a distance, in low blufis. 
No. 24. Heavy deposit of drab clays and indurated layers, compared 
with the Colorado group of the Cretaceous, appearing in “ bad-iand” 
bluff slopes. 
No. 25. Loosely compacted conglomerate, consisting of rounded Ar- 
chean bowlders and pebbles, with local thin layers of soft buff sand- 
stone, the general appearance of the exposures showing obscure strati- 
fication, nearly horizontal, deposited upon the eroded edges of the in- 
clined Mesozoic formations and reaching up nearly to the mountain foot. 
Compared to modern or possibly Pliocene accumulations. It is over- 
spread with later morainal deposits. 
No. 26. Morainal deposits. 
