246 GEOLOGY OF ILLINOIS. 



50. Fire clay and Stigmarial sandstone 4 to 6 



51. Shales, with limestone band 10 " 15 



Top of Lodi Salt well 



52. Argllaceous limestone and calcareous shale 4 " 8 



53. CoalNo.2 1 " 5 



54. Fire clay, and shale with iron nodules 1 6 in. 



55. Hard white sandstone 20 



56. Argillaceous sandstone, with thin streaks of coal 10 



57. " " white 8 



58. Laminated sandstone, with ironstones at bottom 16 9 in. 



59. Sandstone and shale 127 " 



60. Sandy shale, with streaks of coal and slate. ,-,... , 171 " 



61. Buff and white, fine grained, micaceous sandstone, bottom coarser 20 



62. Black and drab clay shale, some sandy layers at bottom 8 11 " 



63. Coal, " Conglomerate seam " '. 16" 



64. Black shale 12 



65. Soft clay shale, or fire clay 19 



66. Hard sandstone 32 



67. Clay shale, few bands of sandstone 24 1 " 



68. " frequent bands of sandstone 30 7 " 



69. Very hard sandstone 23 " 



70. Sandy shale 60 7 " 



71. Fine sandstone 46 5 " 



72. Shale, some portions sandy 92 11 " 



73. Hard fine sandstone 29 " 



74. Shale, with bands of coarse sandstone 951 " 



75. Hard sandstone 6 10 " 



76. "Flint," (probably compact limestone bands, possibly a geode bed). 82" 



77. Shale, some sandy 44 11 " 



78. Compact, coarse, sharp sandstone, with pyrite 10 3 " 



79. Fine sandstone, some shaly layers 54 7 " 



80. Soft clay shale 8 8 " 



81. Shale, with some fine grit 65 5" 



82. "Flint" 1 



83. Porous sandstone 7 3 " 



84. Clayshale 53" 



85. Compact white sandstone . 40 5 " 



86. Sandstone, with flinty layers 34 1 " 



87. Flint 16" 



88. Soft sandstone, top ochreous 9 4 " 



89. Soft clay shale 39 5 " 



90. Shale, with compact sandstone at bottom 26 2 " 



91. Bituminous shale 102 1 " 



92. Hard, coarse, calcareous sandstone, fossiliferoua. 23 1 " 



93. White fossiliferous limestone 910 " 



94. Flint 22" 



95. Magnesian limestone 7 10 " 



