Trumbull County

Coal: RI 36; IC 44
Devonian and Mississipian formations: B 15
General: 2nd AR 1838; V 1, pt. 1
Glacial/Quaternary geology: M 2; B 68; RI 80; OF 293
Minerals: B 69
Oil and gas, "Big Lime" or deeper wells: OF 27
        Mecca oil field: RI 13
        Oriskany sand: RI 13
        "Packer Shell" elevations: OF 65
Sand and gravel: RI 125
Structure map, Berea: OF 155
Structure map, Onondaga: OF 199
 

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