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  • Backbone Limestone
    |category4=Hunton Limestone Megagroup |category6=Limestone
    3 KB (412 words) - 18:09, 11 January 2017
  • Clear Creek Chert
    |category4=Hunton Limestone Megagroup |tree1=Hunton Limestone Megagroup
    4 KB (574 words) - 18:06, 11 January 2017
  • Grassy Knob Chert
    |category4=Hunton Limestone Megagroup |tree1=Hunton Limestone Megagroup
    3 KB (421 words) - 18:11, 11 January 2017
  • Howardton Limestone Member
    |category4=Hunton Limestone Megagroup |category7=Limestone
    3 KB (348 words) - 17:51, 11 January 2017
  • Bailey Limestone
    |category4=Hunton Limestone Megagroup |category6=Limestone
    6 KB (837 words) - 21:25, 22 October 2019
  • Lower Devonian Series
    ...ndbook of Illinois Stratigraphy: Illinois State Geological Survey Bulletin 95, 261 p. ...on, Lower Devonian rocks in Illinois are largely siliceous-- cherty, silty limestone and dolomite, and chert formations. They may have originally extended over
    5 KB (647 words) - 18:05, 11 January 2017
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