Regional Cross
Section Program for Illinois Basin
Janis D. Treworgy, Stephen T. Whitaker
For the first time, the Illinois State Geological Survey will publish a
network of regional cross
sections
portraying the
structural
and stratigraphic
framework of the entire Illinois basin. The network of 16
structural
cross
sections
radiating outward from the Union Oil 1 Cisne Community well (Sec. 3,
T1N, 7E, Wayne County, Illinois) will consist of wireline logs showing formation
boundaries and gross lithofacies of the entire stratigraphic column for over 140
wells. Indiana and Kentucky portions of the network will be prepared in
conjunction with their respective state geological surveys.
Wireline logs are being digitized and stored to allow reproduction of log
curves at different scales and in various combinations. Initial cross
sections
will be published at a vertical scale of 1 in. = 400 ft and a horizontal scale
of 1 in. = 8 mi (1:500,000).
To assure the most accurate structural
and lithologic portrayals possible,
numerous wireline logs are being examined in addition to the 140 illustrated on
the
sections
. Available seismic data, sample and core descriptions, and existing
structure, isopach, and facies
maps
are also being used.
Text describing the sections
will be included on each sheet. Topics will
cover a brief history of deposition and
structural
evolution, distribution of
source rocks, reservoir rocks and seals, and significant fields and plays.
AAPG Search and Discovery Article #91023©1989 AAPG Eastern Section, Sept. 10-13, 1989, Bloomington, Indiana.