574 Emery — Green River Desert Section, Utah. 



A detailed section showing the character of the Salt 

 "Wash member of the McElmo is given below. 



Section of the Salt Wash sandstone member of the 

 McElmo formation. 



On north side of San Eafael Eiver two miles below San Eafael bridge. 



1. Sandstone, coarse-grained, loosely cemented; con- 



tains fragments of fossil wood 20' 



2. Shale, green to gray in color and streaked with 



brown • irregularly bedded ; streaked with yellow 

 at top and bottom indicating presence of carno- 

 tite , 5' 



3. Sandstone, light-colored on fresh fracture, weather- 



ing dark brown medium to coarse-grained, 

 loosely cemented, soft, cross-bedded, massive . . 55' 



4. Shale, variegated light and maroon 17' 



5. Sandstone, light-colored, fine-grained, ledge-making 



but not as hard as sandstones lower in section . . 6' 



6. Shale, mostly light-colored but with some maroon, 



and with one sandstone bed one-half way up 

 which is here iy 2 feet thick, but elsewhere 5' 

 thick 30' 



7. Sandstone, like 9, ledge-making in places ;. ..; 8' 



8. Shale, like that lower in section, mostly maroon ... 15' 



9. Sandstone, like 11 and 13, somewhat irregularly 



bedded and streaked with maroon shale 9' 



10. Shale, mostly maroon but with some light colors, 



and with local sandstone 11' 



11. Sandstone, like 13 3' 



12. Shale, like 14 but with more maroon 9' 



13. Sandstone, nearly white on fresh fracture, weathers 



light brown, hard, compact, very fine-grained, a 



single bed with thin laminae 5' 



14. Shale, variegated light green with some maroon and 



contains some thin sandstone, Base of Salt "Wash 

 sandstone member 5' 



198' 



Above the Salt Wash member of the McElmo lies a 

 series of variegated clay shales 170 to 200 feet thick, 

 which weather into steep cliffs and are very conspicuous 

 because of their gray, purple, and maroon colors. The 

 shales contain numerous well-polished pebbles y± to 2 

 inches in diameter, resembling gastroliths, which are 



