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Geology, Stratigraphic--Mississippian (1) |
Plate tectonics (1) |
Volcanic ash, tuff, etc.--Arkansas--Ouachita Mountains (1) |
Volcanic ash, tuff, etc.--Oklahoma--Ouachita Mountains (1) |
Geology, Stratigraphic--Mississippian (1) |
Plate tectonics (1) |
Volcanic ash, tuff, etc.--Arkansas--Ouachita Mountains (1) |
Volcanic ash, tuff, etc.--Oklahoma--Ouachita Mountains (1) |