Bernadotte Sandstone Member

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Lithostratigraphy: McCormick Group >>Abbott Formation >>Bernadotte Sandstone Member
Chronostratigraphy: Paleozoic Erathem >>Pennsylvanian Subsystem >>Atokan 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 Bernadotte Sandstone Member (Savage, 1927, p. 307-316).

Derivation

Named for the former town of Bernadotte, Fulton County.

Other names

History/background

Type section

Type location

The type locality is near the former town of Bernadotte (SW 19, 5N-2E) (Wanless, 1956, p. 9; 1957, p. 70-72, 103).

Type author(s)

Type status

Reference section

Reference location

Reference author(s)

Reference status

Stratigraphic relationships

The Bernadotte Sandstone Member forms the top of the Abbott Formation in western Illinois.

Extent and thickness

The Bernadotte Sandstone is fairly extensive in western Illinois and attains thicknesses of 18 feet, though it commonly averages about 5 feet.

Lithology

It is very fine grained, only slightly micaceous, and the upper part is commonly cemented with silica. The Bernadotte differs from most Pennsylvanian sandstones in generally having a flat base and an uneven top, on the thicker parts of which overlying stratigraphic units tend to wedge out (Wanless, 1957).

Core(s)

Photograph(s)

Contacts

Well log characteristics

Fossils

Age and correlation

The Bernadotte is correlated with the Murray Bluff Sandstone of southern Illinois.

Environments of deposition

Economic importance

Remarks

References

SAVAGE, T. E., 1927, Significant breaks and overlaps in the Pennsylvanian rocks of Illinois: American Journal of Science, v. 14, p. 307-316.
WANLESS, H. R., 1956, Classification of the Pennsylvanian rocks of Illinois as of 1956: Illinois State Geological Survey Circular 217, 14 p.
WANLESS, H. R., 1957, Geology and mineral resources of the Beardstown, Glasford, Havana, and Vermont Quadrangles: Illinois State Geological Survey Bulletin 82, 233 p.

ISGS Codes

Stratigraphic Code Geo Unit Designation
3550
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