62 H. E. Gregory — A Cfeologic Reconnaissance 



Strike N 70° ± W; dip S 30°-40°. Measured with the assistance of 

 K. C. Heald. 



Feet. 



1. Sandstone, brown, massive, microscopically fine grained ; 



gray quartz with ferric and calcareous cement .... 3 



2. Shale, chocolate, arenaceous, irregularly bedded, cal- 



careous, imbricated, nodular 6 



3. Shale, chocolate, and calcareous sandstone, in alternat- 



ing beds, 3 to 6 inches thick; contains thin lenses 



of gray quartz sandstone 25 



4. Sandstone, brown 4 



5. Concealed by debris 50 



6. Sandstone, white quartz, medium grained; in three 



beds separated by layers of brown sandstone 6 



7. Shale, chocolate -. 3 



8. Sandstone, brown 6 



9. Shale, chocolate, and sandstone, in about equal 



amounts ; beds 2 to 6 feet thick ; much broken .... 40 



10. Sandstone, brown, with small lenses of chocolate shale 6 



11. Shale, chocolate, and sandstone, unevenly bedded, len- 



ticular, imbricated 12 



12. Sandstone, brown 5 



13. Shale, chocolate, with bands of brown sandstone; sand- 



stone cross-bedded; shale surfaces sun-baked, and 



traversed by mud cracks 14 



14. Sandstone, brown 2 



15. Shale, chocolate 4 



16. Sandstone, brown 7 



17. Shale, chocolate 2 



18. Sandstone, brown 4 



19. Shale, chocolate, with layers of brown sandstone .... 6 



20. Sandstone, gray, highly calcareous, with overlapping 



lenses of brown sandstone and chocolate shale; also 



pebbles of shale 1 inch in diameter 4 



21. Shale, chocolate 3 



22. Sandstone, gray, like ISTo. 20 5 



23. Shale, chocolate 1 



24. Sandstone, brown to chocolate; very thin-bedded, tan- 



gentially cross-bedded, ripple marked; worm tubes; 



sun-baked surfaces specked with flakes of muscovite 12 



25. Shale, chocolate, nodular, imbricated 5 



26. Sandstone, banded, alternating paper-thin layers ; sur- 



faces coated with brown and black hematite 10 



27. Shale, chocolate, calcareous 2 



2S. Sandstone, brown; on its uneven surface are plastered 



lumps of clay shale 4 



29. Shale, chocolate, sandy and calcareous, unevenly bedded 3 



30. Sandstone, brown, thin-bedded and banded like ISTo. 26' 9 



