Pounds Sandstone Member

Lithostratigraphy: McCormick Group >>Caseyville Formation >>Pounds Sandstone Member
Chronostratigraphy: Paleozoic Erathem >>Pennsylvanian Subsystem >>Morrowan Series
Allostratigraphy: Absaroka Sequence

Primary source

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.

Contributing author(s)

M. E. Hopkins and J. A. Simon

Name

Original description

The Pounds Sandstone Member of the Caseyville Formation (Weller, 1940, p. 38).

Derivation

Named for Pounds Hollow in Gallatin County.

Type section

Type location

The type section consists of exposures along Pounds Hollow (35, 36, 10S-8E).

Stratigraphic relationships

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).

Lithology

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).

Fig. P-9 -- Geologic map of the sub-Pennsylvanian (sub-Absaroka) surface (after Willman et al., 1967).

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.

References

WELLER, J. M., 1940, Geology and oil possibilities of extreme southern Illinois: Illinois State Geological Survey Report of Investigations 71, 71 p.

ISGS Codes

Stratigraphic Code	Geo Unit Designation
3830	cv-p