COAL MEASURES. 23 



Ft. In. 



No. 42. Blackshale 4 7 



No. 43. Coal(local) 8 



No. 44. Fire-clay and nodular arg. limestone 11 1 



No. 45. Mottled dark sandstone 13 



No. 46. Striped sandy shales 66 8 



No. 47. Clayshale 2 3 



No. 48. Fossiliferous shale 6 



No. 49. CoalNo.8 1 1 



No. 50. Shale and ;flre-clay 1 6 



No. 51. Sandy shales and sandstone 87 6 



No. 52. CoalNo.7 6 



No. 53. Dark clay shale 15 



No. 54. Dark argillaceous limestone 6 



No. 55. Bituminous shale 4 



No. 56. No core (soft calcareous shale?) 7 3 



No. 57. Hard pyritiferous rock 4 9 



No. 58. CoalNo.6 2 8 



No. 59. Hard clay shale 3 



No. 60. Argillaceous limestone 3 6 



No. 61. Darkshale 5 2 



No. 62. Dark gray limestone 12 



No. 63. Blackshale 4 



No. 64. Septaria (nodule) 19 



No. 65. Blackshale 1 



No. 66. Coal... . 7 3 



Total depth 719 6 



The surface deposits at Pana proved to be about 127 feet thick, 

 and consequently they struck the bed-rock considerably below the 

 horizon of coal No. 14, which outcrops on the creek two or three 

 miles south of the city. No. 13 could not be identified in the bor- 

 ing, and its place would be not far below No. 15 of the section. 

 One interesting feature of the superficial deposits here was the 

 presence of two distinct Forest beds, or ancient soils, one three and 

 a half and the other two and a half feet thick, and separated by 

 57 feet of blue clay. One or both of these ancient soils have been 

 found over a large portion of the State, and they present a serious 

 obstacle to the land ice or glacier theory of the origin of the Drift 

 deposits. 



Another important boring with the diamond drill has been made 

 by the Ellsworth Coal Company, two miles west of Danville. This 

 boring shows the general development of all the coals in the lower 

 Coal Measures from No. 7 to the bottom of the series. It com- 

 mences just below the Danville coal, which is No. 7 of the general 

 section, and ends in the sandstone at the base of the Coal Measures. 

 These lower seams have their outcrop in Indiana, and this is the 

 first attempt that has been made on the eastern border of the coal 

 region in Illinois to ascertain whether any of the lower seams could 



