56 II. E. Gregory — A Geologic Reconnaissance 



Feet. 



8. Shale, chocolate, like No. 6 9 



9. Sandstone, hrown, like ]STo. 7, but crumbly, nodular, 



highly argillaceous, and minutely cross-bedded .... 7 



10. Shale, chocolate, like No. 6 6 



11. Sandstone, brown, like No. 1 ; much cross-bedded ... 9 



12. Shale, chocolate, like No. 6 12 



13. Sandstone, brown 4 



14. Shale, chocolate 1 



15. Sandstone, brown 1 



16. Shale, chocolate 2 



17. Sandstone, brown, much cross-bedded 13 



18. Sandstone, light gray; weathers yellow-gray; uniform 



medium grain; very thin-bedded, cross-bedded; a 



patch or lense on bottom of bed No. 17 1 



19. Shale, chocolate, highly arenaceous 8 



20. Sandstone, gray, cross-bedded, thin-bedded, uniform 



medium grain; calcareous cement; apparently dif- 

 fers from No. 7 only in color 4 



21. Shale, chocolate 12 



22. Sandstone, brown, like No. 1 9 



23. Shale, chocolate, with 4-inch band of brown sandstone 5 



24. Sandstone, gray, friable, calcareous, with arenaceous 



and calcareous concretions; weathers bright yellow 



on upper surface 5 



25. Shale, red to chocolate 4 



26. Sandstone, brown, with bands of paper-thin shale near 



top 3 



27. Shale, chocolate, with 1-inch bands of brown sandstone 



and half -inch lens of blue limestone 4 



28. Sandstone, brown, with 1-inch cap of gray sandstone 4 



29. Shale, chocolate 4 



30. Sandstone, brown 3 



31. Shale, chocolate 2 



32. Sandstone, brown, capped with thin layer of gray sand- 



stone 2 



33. Shale, chocolate 1 



34. Sandstone, brown 1 



35. Shale, chocolate 5 



36. Sandstone, brown 1 



37. Shale, chocolate, and brown sandstone, in alternating 



beds, 2 to 3 inches thick 6 



38. Sandstone, brown 3 



39. Shale, chocolate 7 



40. Sandstone, brown, extremely thin-bedded and cross- 



bedded 15 



41. Shale, chocolate 6 



