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Showing below up to 100 results in range #1 to #100.

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  1. (hist) ‎Caseyville Formation ‎[56,096 bytes]
  2. (hist) ‎Pennsylvanian Subsystem ‎[24,792 bytes]
  3. (hist) ‎Tiskilwa Formation ‎[17,733 bytes]
  4. (hist) ‎Lemont Formation ‎[17,243 bytes]
  5. (hist) ‎Kewaunee Formation ‎[15,607 bytes]
  6. (hist) ‎Delavan Member ‎[15,197 bytes]
  7. (hist) ‎Pleistocene Series ‎[14,997 bytes]
  8. (hist) ‎Silurian System ‎[14,116 bytes]
  9. (hist) ‎Equality Formation ‎[13,974 bytes]
  10. (hist) ‎Haeger Member ‎[13,694 bytes]
  11. (hist) ‎Henry Formation ‎[13,272 bytes]
  12. (hist) ‎Batestown Member ‎[13,265 bytes]
  13. (hist) ‎Roxana Silt ‎[12,975 bytes]
  14. (hist) ‎Lake Michigan Member ‎[12,710 bytes]
  15. (hist) ‎Cambrian System ‎[12,576 bytes]
  16. (hist) ‎Eastern Granite-Rhyolite Province (Basement) ‎[12,560 bytes]
  17. (hist) ‎Ordovician System ‎[12,399 bytes]
  18. (hist) ‎Yorkville Member ‎[12,289 bytes]
  19. (hist) ‎Peddicord Tongue ‎[12,134 bytes]
  20. (hist) ‎Glasford Formation ‎[11,427 bytes]
  21. (hist) ‎Peoria Silt ‎[11,361 bytes]
  22. (hist) ‎Banner Formation ‎[11,333 bytes]
  23. (hist) ‎Battery Rock Sandstone Member ‎[11,163 bytes]
  24. (hist) ‎Wadsworth Formation ‎[10,630 bytes]
  25. (hist) ‎Sangamon Soil ‎[10,505 bytes]
  26. (hist) ‎Devonian System ‎[10,172 bytes]
  27. (hist) ‎Ashmore Tongue ‎[9,988 bytes]
  28. (hist) ‎Mississippian Subsystem ‎[9,881 bytes]
  29. (hist) ‎Wedron Group ‎[9,854 bytes]
  30. (hist) ‎Pounds Sandstone Member ‎[9,639 bytes]
  31. (hist) ‎Mounds Gravel ‎[9,611 bytes]
  32. (hist) ‎Cretaceous System ‎[9,441 bytes]
  33. (hist) ‎Wayside Member ‎[9,417 bytes]
  34. (hist) ‎Mason Group ‎[9,223 bytes]
  35. (hist) ‎Two Rivers Member ‎[8,957 bytes]
  36. (hist) ‎Grigg tongue ‎[8,856 bytes]
  37. (hist) ‎Piatt Member ‎[8,839 bytes]
  38. (hist) ‎Sellers Limestone Bed ‎[8,707 bytes]
  39. (hist) ‎Gentry Coal Bed ‎[8,637 bytes]
  40. (hist) ‎Yarmouth Soil ‎[8,160 bytes]
  41. (hist) ‎Raccoon Creek Group ‎[8,045 bytes]
  42. (hist) ‎Grover Gravel ‎[8,040 bytes]
  43. (hist) ‎Shorewood Member ‎[7,998 bytes]
  44. (hist) ‎Racine Formation ‎[7,746 bytes]
  45. (hist) ‎Robein Member ‎[7,730 bytes]
  46. (hist) ‎Beverly Tongue ‎[7,677 bytes]
  47. (hist) ‎Chesterian Series ‎[7,632 bytes]
  48. (hist) ‎Manitowoc Member ‎[7,478 bytes]
  49. (hist) ‎Farmdale Soil ‎[7,408 bytes]
  50. (hist) ‎Cahokia Alluvium ‎[7,406 bytes]
  51. (hist) ‎Winnebago Formation ‎[7,044 bytes]
  52. (hist) ‎Precambrian Erathem ‎[6,683 bytes]
  53. (hist) ‎Kankakee Formation ‎[6,400 bytes]
  54. (hist) ‎Maquoketa Shale Group ‎[6,384 bytes]
  55. (hist) ‎Cedar Valley Limestone ‎[6,381 bytes]
  56. (hist) ‎Loveland Silt ‎[6,362 bytes]
  57. (hist) ‎Dunleith Formation ‎[6,166 bytes]
  58. (hist) ‎Morton Tongue ‎[6,124 bytes]
  59. (hist) ‎Kellerville Till Member ‎[6,080 bytes]
  60. (hist) ‎Afton Soil ‎[6,079 bytes]
  61. (hist) ‎Valmeyeran Series ‎[6,074 bytes]
  62. (hist) ‎Upper Devonian Series ‎[6,056 bytes]
  63. (hist) ‎Carbondale Formation ‎[6,010 bytes]
  64. (hist) ‎Champlainian Series ‎[5,963 bytes]
  65. (hist) ‎Burlington Limestone ‎[5,953 bytes]
  66. (hist) ‎Markham Silt Member ‎[5,885 bytes]
  67. (hist) ‎Grand Tower Limestone ‎[5,809 bytes]
  68. (hist) ‎St. Peter Sandstone ‎[5,790 bytes]
  69. (hist) ‎Bailey Limestone ‎[5,752 bytes]
  70. (hist) ‎Galena Group ‎[5,740 bytes]
  71. (hist) ‎Lingle Formation ‎[5,612 bytes]
  72. (hist) ‎Niagaran Series ‎[5,574 bytes]
  73. (hist) ‎Platteville Group ‎[5,481 bytes]
  74. (hist) ‎Chouteau Limestone ‎[5,325 bytes]
  75. (hist) ‎New Albany Shale Group ‎[5,280 bytes]
  76. (hist) ‎Ste. Genevieve Limestone ‎[5,279 bytes]
  77. (hist) ‎Kinderhookian Series ‎[5,273 bytes]
  78. (hist) ‎Cincinnatian Series ‎[5,226 bytes]
  79. (hist) ‎Enion Formation ‎[5,174 bytes]
  80. (hist) ‎Moccasin Springs Formation ‎[5,120 bytes]
  81. (hist) ‎Borden Siltstone ‎[5,093 bytes]
  82. (hist) ‎Shakopee Dolomite ‎[5,041 bytes]
  83. (hist) ‎Middle Devonian Series ‎[5,002 bytes]
  84. (hist) ‎Paleozoic Erathem ‎[4,985 bytes]
  85. (hist) ‎Potosi Dolomite ‎[4,918 bytes]
  86. (hist) ‎Glenwood Formation ‎[4,911 bytes]
  87. (hist) ‎Ironton Sandstone ‎[4,884 bytes]
  88. (hist) ‎Hulick Till Member ‎[4,863 bytes]
  89. (hist) ‎Joachim Dolomite ‎[4,862 bytes]
  90. (hist) ‎Salem Limestone ‎[4,820 bytes]
  91. (hist) ‎Spechts Ferry Formation ‎[4,792 bytes]
  92. (hist) ‎Herrin Coal Member ‎[4,788 bytes]
  93. (hist) ‎Mt. Simon Sandstone ‎[4,786 bytes]
  94. (hist) ‎Pearl Formation ‎[4,776 bytes]
  95. (hist) ‎Franconia Formation ‎[4,724 bytes]
  96. (hist) ‎Wapsipinicon Limestone ‎[4,711 bytes]
  97. (hist) ‎Lower Devonian Series ‎[4,711 bytes]
  98. (hist) ‎Guttenberg Formation ‎[4,679 bytes]
  99. (hist) ‎Toulon Member ‎[4,658 bytes]
  100. (hist) ‎Meadow Loess Member ‎[4,641 bytes]

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