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  • Bilyeu Member
    |tree3=Bilyeu Member ...ndbook of Illinois Stratigraphy: Illinois State Geological Survey Bulletin 95, 261 p.
    2 KB (303 words) - 22:26, 18 January 2017
  • Warsaw Shale
    ...ndbook of Illinois Stratigraphy: Illinois State Geological Survey Bulletin 95, 261 p. ...tral Illinois continues westward into the Warsaw Shale, where it becomes a member of the Warsaw.
    4 KB (501 words) - 22:21, 18 January 2017
  • Borden Siltstone
    ...ndbook of Illinois Stratigraphy: Illinois State Geological Survey Bulletin 95, 261 p. ...bed of coarse siltstone and fine sandstone is differentiated as the Bilyeu Member. Beds of fine sandstone and coarse siltstone near the base of the Borden ar
    5 KB (674 words) - 16:18, 22 October 2019
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