Historical:McWain Sandstone Member
M. E. Hopkins and J. A. Simon
The McWain Sandstone Member of the Bond Formation (Ball, 1943, p. 150) is named for the McWain Farms, Macoupin County.
The type section consists of exposures along Macoupin Creek (SE 25, 10N-7W) (Ball, 1952, p. 44).
It has been correlated with the Mt. Carmel Sandstone.
The McWain occurs as a channel sandstone in southwestern Illinois, where it locally rests on the Shoal Creek Limestone or on strata between the Shoal Creek and the Macoupin Limestone.
BALL, J. R., 1943, Pennsylvanian stratigraphy of the Carlinville, Illinois, Quadrangle: Illinois Academy of Science Transactions, v. 36, p. 147-150; 1944, Illinois State Geological Survey Circular 102.
BALL, J. R., 1952, Geology and mineral resources of the Carlinville Quadrangle: Illinois State Geological Survey Bulletin 77, 110 p.
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