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Showing below up to 100 results in range #51 to #150.

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  1. Elviran Stage
  2. Elwood Formation
  3. Embayment Megagroup
  4. Eminence Formation
  5. Enion Formation
  6. Eocene Series
  7. Equality Formation
  8. Fraileys Shale
  9. Franconia Formation
  10. Franconian Stage
  11. Galena Group
  12. Gasperian Stage
  13. Genevievian Stage
  14. Glasford Formation
  15. Glenwood Formation
  16. Golconda Group
  17. Grand Detour Formation
  18. Grand Tower Limestone
  19. Grover Gravel
  20. Gulfian Series
  21. Guttenberg Formation
  22. Hannibal Shale
  23. Henry Formation
  24. Holocene Series
  25. Hombergian Stage
  26. Hunton Limestone Megagroup
  27. Ironton Sandstone
  28. Joachim Dolomite
  29. Joliet Formation
  30. Kankakee Formation
  31. Kaskaskia Sequence
  32. Keokuk Limestone
  33. Kewanee Group
  34. Kewaunee Formation
  35. Kimmswick Subgroup
  36. Kinderhookian Series
  37. Kings Lake Formation
  38. Kinkaid Limestone
  39. Knobs Megagroup
  40. Knox Dolomite Megagroup
  41. Lake Michigan Formation
  42. Lemont Formation
  43. Limestone
  44. Lingle Formation
  45. Lower Devonian Series
  46. Mammoth Cave Limestone Megagroup
  47. Maquoketa Shale Group
  48. Mason Group
  49. Mattoon Formation
  50. Maysvillian Stage
  51. Mazon Creek
  52. McCormick Group
  53. McLeansboro Group
  54. McNairy Formation
  55. Menard Limestone
  56. Mesozoic Erathem
  57. Middle Devonian Series
  58. Mifflin Formation
  59. Mississippian Subsystem
  60. Missourian Series
  61. Modesto Formation
  62. Morrowan Series
  63. Mounds Gravel
  64. Mt. Simon Sandstone
  65. Nachusa Formation
  66. New Albany Shale Group
  67. Niagaran Series
  68. Non-marine Sand, Clay, and Silt
  69. North Hill Group
  70. Okaw Group
  71. Oneota Dolomite
  72. Oolite
  73. Ordovician System
  74. Ottawa Limestone Megagroup
  75. Owl Creek Formation
  76. Paint Creek Group
  77. Paleocene Series
  78. Paleozoic Erathem
  79. Pearl Formation
  80. Pecatonica Formation
  81. Pennsylvanian Subsystem
  82. Peoria Silt
  83. Platteville Group
  84. Plattin Subgroup
  85. Pleistocene Series
  86. Pliocene Series
  87. Pope Megagroup
  88. Porters Creek Formation
  89. Post Creek Formation
  90. Potsdam Sandstone Megagroup
  91. Prairie du Chien Group
  92. Precambrian
  93. Producing Zones and Informal Names
  94. Quaternary System
  95. Quimbys Mill Formation
  96. Raccoon Creek Group
  97. Renault Limestone
  98. Richmondian Stage
  99. Ridenhower Formation
  100. Roxana Silt

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