PEALE.] 



GEOLOGY SECTION NO. 28. 2G3 



of Maroon Mountain. The profile across this creek is shown in Fig. 1, 

 Plate XIX. Here on the right side Ave have three steps, the first, a, 

 being 15 feet; the second, Z>, 35 feet; and the third, c, 50 feet. The 

 latter is about 4 feet above the level of the stream. The tops of the 

 upper terraces seem to have a general level, and are overgrown with 

 sage-brush. Along the streams at the bottom of the small caiions there 

 is a growth of aspens and pines. Between the mouth of Maroon Creek 

 and Eoaring Fork there is a conical-shaped butte that rises about 350 

 feet above the general level. This is represented at A in Fig. 1, Plate 

 XIX. The following section was made here from the point d in descend- 

 ing order : 



Section No. 28. 



d. 1. Soft fine-grained yellow sandstone. At the south end of the 

 butte there are two small faults in this bed and in the bed next 

 below ; thickness, about 20 feet. 



2. Eed sandstones. The upper portion very hard, becoming softer 



and shaly as we go down. They become greenish also as we de- 

 scend ; thickness, 40 feet 2 inches. 



3. Very hard greenish-gray calcareous sandstone, with calcite dis- 



tributed through it; thickness, 18 inches.- 



4. Fine red shales, with a band of hard sandstone in the center, 1 



foot. 



5. Sandstone, with a band of shales 1 inch in thickness, 12 feet G 



inches. 



6. Very fine deep^red shales breaking into very small pieces, and 



having interlaminated bands of hard sandstone each about 1 inch 

 in thickness, 8 feet. 



7. Coarse pink sandstone, shaly in places and conglomeriiic at top, 



15 feet. 



8. Coarse pink shaly sandstone, 6 feet. 



9. Coarse pink congiomeritic sandstone, like N"o. 7, but not quite so 



coarse-grained. The pebbles and matrix are both siliceous, 25 

 feet. 



10. Irregular purplish limestone, very coarse, with shales, 8 feet. 



11. Shaly sandstones, 10 feet 6 inches. 



12. Coarse irregular purplish limestone, resembling a conglomerate. 



There is about 5 feet of this and then 1 inch of green shale, be- 

 low which we have a bed of the limestone in structure like the 

 upper part, but of brick-red color ; total thickness, 8 feet. 



13. Limestone conglomerate, with masses of purplish blue limestone, 



varying from 1 to 4 inches in diameter, 4 feet. 



14. Irregular brick-red calcareous sandstone, with cross fracture. In 



some places there are greenish bands, 40 feet. 



15. Coarse brick-red sandstone with cross fracture, 5 feet. ■ 



16. Fine-grained red sandstone, 5 feet. 



17. Limestone conglomerate, like !N"o. 13, 8 feet. 



18. Irregular brick-red sandstones, 21 feet 8 inches. 



19. Eed sandstones, compact above, becoming irregular and mot- 



tled toward the center, and compact below again , 84 feet 10 inches. 

 €. 20. Compact fine-grained yellow sandstone, 77 feet 7 inches. 



21. Blue limestones, with interlaminated shales. The limestone is in 



beds about 2 feet each in thickness, while the limestone varies 

 from 2 to 5 feet ; 155 feet. 



22. Space reaching to base of hill, 155 feet. 



Below these beds, on a ridge between the mouth of the creek and 



