Pounds Sandstone Member
Willman, H. B., Elwood Atherton, T. C. Buschbach, Charles Collinson, John C. Frye, M. E. Hopkins, Jerry A. Lineback, and Jack A. Simon, 1975, Handbook of Illinois Stratigraphy: Illinois State Geological Survey Bulletin 95, 261 p.
M. E. Hopkins and J. A. Simon
The Pounds Sandstone Member of the Caseyville Formation (Weller, 1940, p. 38).
Named for Pounds Hollow in Gallatin County.
The type section consists of exposures along Pounds Hollow (35, 36, 10S-8E).
The Pounds Sandstone Member is the uppermost member of the Caseyville Formation.
Extent and thickness
The Pounds Sandstone reaches 100 feet thick, forming long, abrupt bluffs in southern Illinois, usually north of the Battery Rock bluff. The Pounds is also known as far north as Rock Castle Creek in Randolph County (33, 6S-5W).
The Pounds Sandstone is lithologically similar to the Battery Rock Sandstone. Like other members of the Caseyville Formation, the Pounds Sandstone has not been widely traced in the subsurface north of the outcrop belt, although strata of this age and lithologic character are known to be present (fig. P-9).
Well log characteristics
Age and correlation
The Pounds is correlated with part of the Mansfield Sandstone of Indiana and the upper Caseyville conglomerate, or Bee Springs Sandstone Member, of western Kentucky.
Environments of deposition
WELLER, J. M., 1940, Geology and oil possibilities of extreme southern Illinois: Illinois State Geological Survey Report of Investigations 71, 71 p.
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