Pottsville Coalbed Gas Total Petroleum System :
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| Cahaba Basin Assessment Unit |
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Carboniferous Coalbed Gas Total Petroleum System :
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| Eastern Dunkard Basin Assessment Unit |
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| Pocahontas Basin Assessment Unit |
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| Western Dunkard Basin Assessment Unit |
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| Central Appalachian Shelf Assessment Unit |
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| Appalachian Anthracite and Semi-Anthracite Assessment Unit |
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Devonian Shale-Middle and Upper Paleozoic Total Petroleum System :
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| Northwestern Ohio Shale Assessment Unit |
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| Devonian Siltstone and Shale Assessment Unit |
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| Greater Big Sandy Assessment Unit |
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| Catskill Sandstones and Siltstones Assessment Unit |
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| Marcellus Shale Assessment Unit |
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| Berea Sandstone Assessment Unit |
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| Mississippian Sandstones Assessment Unit |
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| Greenbrier Limestone Assessment Unit |
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| Oriskany Sandstone-Stratigraphic Assessment Unit |
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| Oriskany Sandstone-Structural Assessment Unit |
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Utica-Lower Paleozoic Total Petroleum System :
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| Clinton-Medina Transitional Northeast Assessment Unit |
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| Clinton-Medina Basin Center Assessment Unit |
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| Tuscarora Basin Center Assessment Unit |
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| Clinton-Medina Transitional Assessment Unit |
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| Lockport Dolomite Assessment Unit |
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| Black River-Trenton Hydrothermal Dolomite Assessment Unit |
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| Knox Unconformity Assessment Unit |
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| Lower Paleozoic Carbonates in Thrust Belt Assessment Unit |
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Sevier-Knox/Trenton Total Petroleum System :
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| Lower Paleozoic Carbonates Assessment Unit |
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Conasauga-Rome/Conasauga Total Petroleum System :
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| Rome Trough Assessment Unit |
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