Tripp Limestone Member
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).
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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
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