Tripp Limestone Member

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Lithostratigraphy: Hunton Limestone Megagroup >>Lingle Formation >>Tripp Limestone Member
Chronostratigraphy: Paleozoic Erathem >>Devonian System >>Middle Devonian 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)

Charles Collinson and Elwood Atherton

Name

Original description

The Tripp Limestone Member of the Lingle Formation (North, 1969, p. 25-28).

Derivation

Named for Tripp School, 200 yards northwest of the type section.

Other names

History/background

Type section

Type location

The type section of the Tripp Limestone Member is an outcrop on the south side of Kratzinger Hollow, 1 mile northwest of Jonesboro, Union County (N 1/2 NE NW 23, 12S-2W).

Type author(s)

Type status

Reference section

Reference location

Reference author(s)

Reference status

Stratigraphic relationships

The Tripp Limestone Member of the Lingle Formation overlies the Howardton Limestone Member.

Extent and thickness

The upper 17 feet of the member is exposed at the type section and 22-foot thicknesses are found in near-by wells. The Tripp is widespread and reaches 80 feet thick in south-central Illinois, although it is absent in southeastern Illinois (fig. D-15).

Lithology

The Tripp Member contains limestone, dolomite, chert, siltstone, and shale. It is largely cherty, argillaceous, silty limestone, but beds of shale are abundant near its base and top. About half of the member is dolomite on the margin of the Sparta Shelf. Glauconite, quartz sand, oolite, and beds of phosphate pellets are locally abundant in the northern and western parts of the member.

Core(s)

Photograph(s)

Contacts

Well log characteristics

Fossils

Crinoids, brachiopods, and corals are abundant in some Tripp Member beds.

Age and correlation

Environments of deposition

Economic importance

Remarks

References

NORTH, W. G., 1969, Middle Devonian strata of southern Illinois: Illinois State Geological Survey Circular 441, 45 p.

ISGS Codes

Stratigraphic Code Geo Unit Designation
6050
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