Fults Member

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Lithostratigraphy: Mammoth Cave Limestone Megagroup >>Salem Limestone >>Fults Member
Chronostratigraphy: Paleozoic Erathem >>Mississippian Subsystem >>Valmeyeran Series
Allostratigraphy: Kaskaskia 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)

Elwood Atherton, Charles Collinson, and Jerry A. Lineback

Name

Original description

The Fults Member of the Salem Limestone (Baxter, 1960a, p. 22-24).

Derivation

Named for Fults, Monroe County.

Other names

History/background

Type section

Type location

The type section of the Fults Member is in the bluffs three-fourths of a mile northwest of the town of Fults (SE NE 20, 4S-10W), where the member is 29.4 feet thick.

Type author(s)

Type status

Reference section

Reference location

Reference author(s)

Reference status

Stratigraphic relationships

Extent and thickness

The Fults Member is 25-34 feet thick in the outcrop area in Monroe and St. Clair Counties.

Lithology

The Fults Member consists largely of thin- to medium-bedded, fine-grained, silty, cherty, more or less dolomitic limestone, but it contains beds of medium-grained limestone composed of fragmented fossils.

Core(s)

Photograph(s)

Contacts

Well log characteristics

Fossils

Globoendothyra baileyi and Eoendothyranopsis spiroides are common.

Age and correlation

Environments of deposition

Economic importance

Remarks

References

BAXTER, J. W., 1960a, Salem Limestone in southwestern Illinois: Illinois State Geological Survey Circular 284, 32p.

ISGS Codes

Stratigraphic Code Geo Unit Designation
5210
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