ALTERNATING SERIES IN DETAIL. 127 



Foot. 



28. Limestone, gray and pink, stained red G 



27. Concealed 6 



26. Limestone, gray and pink, stained red 4 



25. Limestone, gray, fossiliferons* 1£ 



24. Sandstone, light pink 5 



23. Limestone, gray and pink 3 



22. Sandstone, wliite, pink, and red G 



21 . Limestone, pink 1 J 



20. Sandstone 2 



19. Limestone, fossilii'erous* 1£ 



18. Pink and red sandstones 7£ 



17. Limestone, gray and hard in strata, 2 feet thick 12 



1G. Limestone, compact and gray 3 



15. Limestone, gray and pink, hard and flinty 2 



14. Sandstone, yellow G 



13. Limestone, impure 3 



12. Sandstone, yellow, massive 4 



11. Sandstone, shaly 1 



10. Sandstone, massive, red stained 10 



9. Limestone, pink 2 



8. Sandstone, fine grained, yellow G 



7. Limestone, gray, silicious, flinty 6 



6. Concealed 6 



5. Limestone, gray, compact, fossiliferous* 8 



4. Limestone, flinty, pink 4 



3. Sandstone, pink and yellow, fine grained, weathering red 5 



2. Limestone, silicious, with some sandstone 10 



1. Limestone, silicious, brecciated 15 



No. 3 of the Carboniferous. 



The fossils found in the strata marked (*) are few in number and badly 

 preserved. They are mainly ill-marked casts of very small brachiopods and 

 gasteropods so poorly defined as to be indeterminable, and though close 

 search was made, none were found that were of any value in determining 

 the relationship of the inclosing rocks. 



Before entering the canon in which this section was observed Box 

 Elder Creek flows for eight or ten miles in a southeasterly direction, and 

 for the most of that distance it skirts the inner base of the monoclinal ridge. 

 One who follows up the creek valley has at his right, beyond a short slope, 

 a vertical cliff 200 to 300 feet in height, formed by the lower Carboniferous 

 rocks, which exhibit their usual character and thickness. In the neighbor- 



