| Pottsville Formation, Black Warrior Basin, Alabama/Mississippi
Only the partial net sand map for the Lower Pennsylvanian (Cleaves, 1983) was found and gridded (c4pottsvilleg).

Cleaves, A., 1983, Carboniferous terrigenous clastic facies, hydrocarbon production zones, and sandstone provenance, northern shelf of Black Warrior Basin: Gulf Coast Association of Geological Societies Transactions, v. 33, p. 41–52
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