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Portage County |
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Bedrock-topography map: OF 204
Coal: RI 36; IC 44
Drift-thickness map: OF 205
Garrettsville quadrangle, bedrock geology: RI 54
General: 2nd AR 1838; V 3
Glacial/Quaternary geology: M 2; B 68; OF 293, 296
Minerals: B 69
Oil and gas, "Big Lime" or deeper wells: OF 49
"Packer Shell" elevations: OF 70
Sand and gravel: RI 6, 114
Structure map, Berea: OF 151
Structure map, Onondaga: OF 193
Surficial materials map: RI 138
Waste disposal: RI 126
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