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Showing below up to 20 results in range #1 to #20.

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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]

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