Historical:Shetlerville Limestone Member
Lithostratigraphy: Pope Megagroup >>Cedar Bluff Limestone Group >>Renault Limestone >>Shetlerville Limestone Member
Chronostratigraphy: Paleozoic Erathem >>Mississippian Subsystem >>Valmeyeran Series
Allostratigraphy: Kaskaskia Sequence
Authors
Elwood Atherton, Charles Collinson, and Jerry A. Lineback
Name Origin
The Shetlerville Limestone Member of the Renault Formation (S. Weller, in S. Weller et al., 1920, p. 123; Swann, 1963, p. 82) is named for Shetlerville, Hardin County.
Type Section
Weller designated the Shetlerville Member a formation, citing exposures of about 30 feet of limestone just east of Shetlerville as the type section. Swann (1963) put the upper shaly part in the Yankeetown, restricted the Shetlerville to 15 feet of limestone exposed in a quarry one-fourth of a mile south of Shetlerville (SE NE SW 35, 12S-7E), and classified it as a member of the Renault.
Description
Most of the limestone is dark greenish or brownish gray, sandy, and oolitic. The basal portion grades to sandstone and is named the Popcorn Sandstone Bed. Some beds are light colored and resemble the underlying Levias Member. The basal contact is sharp and may be unconformable.
Fossils
The Shetlerville contains the crinoid Talarocrinus (fig. M-4) and is the basal part of the Chesterian Series.
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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.
WELLER, STUART, CHARLES BUTTS, L. W. CURRIER, and R. D. SALISBURY, 1920, Geology of Hardin County and the adjoining part of Pope County: Illinois State Geological Survey Bulletin 41 , 402 p.
ISGS Codes
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