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• Jurassic System
  There are currently no known geologic units of Jurassic age in Illinois.
  72 bytes (12 words) - 18:55, 3 May 2016

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• Jurassic System
  There are currently no known geologic units of Jurassic age in Illinois.
  72 bytes (12 words) - 18:55, 3 May 2016
• Main Page
  ::[[Jurassic System]] rect 170 188 373 215 [[Jurassic System]]
  4 KB (531 words) - 22:04, 31 August 2023
• Historical:Mesozoic Erathem
  ...t of the Paleozoic rocks (the Permian System), the Mesozoic, Triassic, and Jurassic Systems and the Comanchean Series of the Cretaceous System are not represen
  3 KB (432 words) - 21:34, 23 November 2016
• Mesozoic Erathem
  ...t of the Paleozoic rocks (the Permian System), the Mesozoic, Triassic, and Jurassic Systems and the Comanchean Series of the Cretaceous System are not represen
  4 KB (509 words) - 21:40, 23 November 2016