394 EEPOET UNITED STATES GEOLOGICAL SUEVEY. 



12. Drab limestone, 20 feet exposed, overlaid by light-drab, indurated 

 calcareous shales. 



13. Bed shales, obscure exposure. 



14. Light shaly calcareous deposits. 



15. Chocolate-colored shales, 200 feet, more or less. 



16. Dark brownish-gray, obliquely laminated sandstone, a heavy ledge. 



17. Chocolate-colored shales, including thin bands of dark-red sand- 

 stone, obscurely exposed hi low undulating hillside, several hundred 

 yards across. 



18. Drab and chocolate-colored shales, obscure exposure. 



19. Dark-blue spar-seamed limestone, obscure ledge, may not be in 

 situ. 



20. Wide space occupied by undulating grassy slopes, with no rock 

 exposures. 



21. Brown sandstone, obscure exposure; dip gently northeastward. 



22. Chocolate-colored shales below. 



23. Chocolate-red and hard drab beds ; dip at an angle of about 40° 

 northeastward. 



24. Heavy bed spar-seamed gray limestone, with rotten chert; dip 

 about 30° northeastward. 



25. Chocolate-colored and red shales. 



26. Limestone, similar to bed No. 24, 50 to 100 feet exposed. 



27. Wide space, showing no rock exj)osures. 



28. Brownish sandstone, obscure exposure, ten yards across; dip 

 southwestward. 



29. Light and chocolate-colored shales below, light shales above. 



30. Drab limestone. 



31. Eed sandstone and red shales ; dark chocolate-colored and drab 

 shales above. 



32. Heavy ledge brown laminated conglomeritic sandstone, dip south- 

 westward at an angle of about 25°. 



33. Unexposed space. 



34. Gray sandstone. 



35. Drab-gray limestone. 



36. Space showing obscure exposures of sandstone. 



37. Dark rusty red conglomeritic sandstone ledges, interbedded with 

 shales. These ledges exhibit an interesting exposure in the precipitous 

 walls on the south side of the stream at the narrows just above the de- 

 bouchure of a considerable tributary draining the west flank of Station 

 XXVII ridge, the beds appearing nearly vertical and arching over to 

 the northeastward. 



38. Unexposed space. 



39. Sandstone. 



40. Bed shales and sandstone. 



41. Sandstone, dipping southward. 



42. Bed and chocolate-colored shales. 



43. Gray sandstone, 20 feet imperfectly exposed. 



44. Bed and chocolate-colored shales. 



45. Chocolate-brown thin-bedded sandstone, 10 feet exposed. 



46. Chocolate-colored shales. 



47. Beddish buff or gray sandstone. >■ 



48. Beddish shales. 



49. Beddish-gray sandstone ; dip northeastward. 



50. Chocolate-colored shales. 



51. Brownish gray sandstone ; dip northeastward. 



