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Showing below up to 50 results in range #1 to #50.

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  1. (hist) ‎Caseyville Formation ‎[55,941 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) ‎Ordovician System ‎[12,399 bytes]
  17. (hist) ‎Yorkville Member ‎[12,289 bytes]
  18. (hist) ‎Peddicord Tongue ‎[12,134 bytes]
  19. (hist) ‎Glasford Formation ‎[11,427 bytes]
  20. (hist) ‎Peoria Silt ‎[11,361 bytes]
  21. (hist) ‎Banner Formation ‎[11,333 bytes]
  22. (hist) ‎Battery Rock Sandstone Member ‎[11,163 bytes]
  23. (hist) ‎Wadsworth Formation ‎[10,630 bytes]
  24. (hist) ‎Sangamon Soil ‎[10,505 bytes]
  25. (hist) ‎Devonian System ‎[10,172 bytes]
  26. (hist) ‎Ashmore Tongue ‎[9,988 bytes]
  27. (hist) ‎Mississippian Subsystem ‎[9,881 bytes]
  28. (hist) ‎Wedron Group ‎[9,854 bytes]
  29. (hist) ‎Pounds Sandstone Member ‎[9,639 bytes]
  30. (hist) ‎Mounds Gravel ‎[9,611 bytes]
  31. (hist) ‎Cretaceous System ‎[9,441 bytes]
  32. (hist) ‎Wayside Member ‎[9,417 bytes]
  33. (hist) ‎Mason Group ‎[9,223 bytes]
  34. (hist) ‎Two Rivers Member ‎[8,957 bytes]
  35. (hist) ‎Grigg tongue ‎[8,856 bytes]
  36. (hist) ‎Piatt Member ‎[8,839 bytes]
  37. (hist) ‎Sellers Limestone Bed ‎[8,707 bytes]
  38. (hist) ‎Gentry Coal Bed ‎[8,637 bytes]
  39. (hist) ‎Yarmouth Soil ‎[8,160 bytes]
  40. (hist) ‎Raccoon Creek Group ‎[8,045 bytes]
  41. (hist) ‎Grover Gravel ‎[8,040 bytes]
  42. (hist) ‎Shorewood Member ‎[7,998 bytes]
  43. (hist) ‎Racine Formation ‎[7,746 bytes]
  44. (hist) ‎Robein Member ‎[7,730 bytes]
  45. (hist) ‎Beverly Tongue ‎[7,677 bytes]
  46. (hist) ‎Chesterian Series ‎[7,632 bytes]
  47. (hist) ‎Manitowoc Member ‎[7,478 bytes]
  48. (hist) ‎Farmdale Soil ‎[7,408 bytes]
  49. (hist) ‎Cahokia Alluvium ‎[7,406 bytes]
  50. (hist) ‎Winnebago Formation ‎[7,044 bytes]

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