30 ECONOMICAL GEOLOGY.. 



Ft. In. 



No. 40. Flintrock? 4 



No. 41. Darkslate 4 



No. 42. Nodular flre-clay 2 10 



No. 43. Brown shale 4 



No. 41. Fire-clay 1 8 



No. 45. Sandyshale 3 6 



No. 46. Softclayshale 1 8 



No. 47. Sandstone 15 6 



No. 48. Gray slate 5 8 



No. 49. Dark slate with iron bauds 1 6 



No. 50. Gray slate with sulphur balls 21 6 



No. 51. Black slate, with fossil shells 4 



No. 52. Gray shale, with shells and plants 15 8 



No. 53. Blackslate 3 6 



No. 54. Blue clay shale 6 



No. 55. Limestone in two bands, with 3 inches shale 1 i 



No. 56. Dark soapstone 4 



No. 57. Limestone 1 



No. 58. Dark clay shale 2 6 



No. 59. Blackslate 5 



No. 60. Coal upper 5 inches cannel. No. 4 1 2 



No. 61. Fire-clay 6 



No. 62. Limestone 1 



No. 63. Dark clay shale... 2 6 



No. 64. Black slate 5 



No. 65. CoalNo. 3 1 2 



No. 66. Fire-clay 6 5 



N. 67. Limestone 2 



No. 68. Clay shale (light and dark) 22 2 



No. 69. Coal (poor) 4 



No. 70. Sandstone, with sulphur and 1 inch coal 4 g 



No. 71. Dark clay shale 13 



No. 72. Hard sulphur rock 3 g 



No. 73. Blackslate 4 Q 



No. 74. Gray slate and shale 11 g 



No. 75. Coal No. 2 2 8 



Total depth 576 4 



The coal at the bottom of this shaft is without doubt coal No. 2 of 

 the general section, though it is not quite so thick here as it averages 

 in LaSalle county. Quite possibly its average thickness will prove 

 to be greater than the above figures may indicate. It is one of the 

 most persistent seams in the State, and furnishes a better quality 

 of coal usually than any of the others. Its freedom from sulphur 

 is sometimes so complete that it can be used in the raw state for 

 smelting iron. 



A boring made at Marissa, in St. Clair county, commenced under 

 the Belleville coal, shows that there is no coal seam of any value 

 below that in that part of St. Clair county. 



