Tygett Sandstone Member
Lithostratigraphy: Pope Megagroup >>Clore Formation >>Tygett Sandstone Member
Chronostratigraphy: Paleozoic Erathem >>Mississippian Subsystem >>Chesterian Series >>Elviran Stage
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 Tygett Sandstone Member of the Clore Formation (Swann, 1963, p. 40, 42).
Derivation
Named for Tygett School, Union County.
Other names
History/background
Type section
Type location
The type section of the Tygett (Swann, 1963, p. 40, 42) is located 1.5 miles north of Tygett School, on Bradshaw Creek (NE NW 24, 11S-1W), where it is 26 feet thick.
Type author(s)
Type status
Reference section
Reference location
Reference author(s)
Reference status
Stratigraphic relationships
The Tygett Sandstone Member is the middle member of the Clore Formation.
Extent and thickness
Lithology
It consists of sandstone and minor amounts of shale.
Core(s)
Photograph(s)
Contacts
Well log characteristics
Fossils
Sigillaria trunks and fragments are common in some beds.
Age and correlation
Environments of deposition
Economic importance
Remarks
References
SWANN, D. H., 1963, Classification of Genevievian and Chesterian (Late Mississippian) rocks of Illinois: Illinois State Geological Survey Report of Investigations 216, 91 p.
ISGS Codes
Stratigraphic Code | Geo Unit Designation |
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