Historical:Dix Limestone Member
Lithostratigraphy: McLeansboro Group >>Mattoon Formation >>Dix Limestone Member
Chronostratigraphy: Paleozoic Erathem >>Pennsylvanian Subsystem >>Missourian Series
Allostratigraphy: Absaroka Sequence
Authors
M. E. Hopkins and J. A. Simon
Name Origin
The Dix Limestone Member of the Mattoon Formation (Bradbury, 1965, p. 4) is named for Dix, Jefferson County, where it has been quarried locally.
Type Section
The type section consists of exposures on a southwest-flowing tributary to Casey Fork, about 2 miles south of Dix (NW SE NW 25, 1S-2E).
Correlation
The Dix may correlate with the fresh-water limestone found at the base of the underclay below the Opdyke Coal.
Stratigraphic Position
It lies about 50 feet above the position of the Millersville Limestone and 300 feet above the Shoal Creek Limestone.
Description
In the area of the type section, the Dix is a brownish gray argillaceous limestone as much as 6 feet thick that contains only Spirorbis and numerous ostracodes.
References
BRADBURY, J. C., 1965, Limestone resources of Jefferson and Marion Counties, Illinois: Illinois State Geological Survey Industrial Minerals Note 23, 15 p.
ISGS Codes
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