Historical:Rosiclare Sandstone Member
Elwood Atherton, Charles Collinson, and Jerry A. Lineback
The Rosiclare Sandstone Member of the Aux Vases Sandstone (Ulrich and Smith, 1905, p. 24, 40; Swann, 1963, p. 80) is named for Rosiclare, Hardin County.
The type section of the Rosiclare Sandstone Member is in the Ohio River bluffs just below the town of Rosiclare (NW SE and SW SE 5, 13S-8E).
Extent and Thickness
It is commonly 20-40 feet thick.
As originally defined, the Rosiclare Sandstone was a member of the Ste. Genevieve Limestone, and the name was widely misapplied to the sandstone now called the Spar Mountain Sandstone Member of the Ste. Genevieve. However, the type Rosiclare was found to be equivalent to the Aux Vases Sandstone (Swann and Atherton, 1948; Swann, 1963). The Rosiclare Sandstone has long been correctly correlated throughout the eastern part of the Illinois Basin, where it is an important oil producer. Consequently, the name "Rosiclare" is retained for a member of the Aux Vases.
The Rosiclare is the main body of the Aux Vases in the area where it overlies the Joppa Member of the Ste. Genevieve and, therefore, does not include lateral equivalents of the Ste. Genevieve Limestone.
SWANN, D. H., 1963, Classification of Genevievian and Chesterian (Late Mississippian) rocks of Illinois: Illinois State Geological Survey Report of Investigations 216, 91 p.
SWANN, D. H., and ELWOOD ATHERTON, 1948, Subsurface correlations of lower Chester strata of the Eastern Interior Basin, in Symposium on problems of Mississippian stratigraphy and correlation: Journal of Geology, v. 56, p. 269-287; Illinois State Geological Survey Report of Investigations 135.
ULRICH, E. O., and W. S. T. SMITH, 1905, Lead, zinc, and fluorspar deposits of western Kentucky: USGS Professional Paper 36, 218 p.
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