Stratigraphy and sedimentation of Mississippian Ste. Genevieve-Cedar Bluff interval, Southwestern Indiana

Conference · Thu Sep 01 00:00:00 EDT 1983 · Am. Assoc. Pet. Geol., Bull.; (United States)

OSTI ID:6797793

Breedon, D; Droste, J B; Murray, H H

The Ste. Genevieve Limestone and Cedar Bluff Group of Mississippian age, both important sources of hydrocarbons in the Illinois basin, were traced from a subsurface stratigraphic section in White County, Illinois (described by Swan in 1963, across Gibson and Daviess Counties, Indiana, using electric logs and sample descriptions from 84 wells. The Ste. Genevieve Limestone is subdivided into four members and the Cedar Bluff Group into three formations. Six cross sections and nine isopach maps based on 300 wells show that these units comprise a succession of alternating fine- and coarse-grained carbonate rocks with only minor interruptions of sandstone and shale. Two complete coarsening-upward cycles are apparent, and a third cycle is incomplete. Each cycle consists of a lower sequence of lime mudstones and wackestones, and an upper sequence of oolitic and skeletal grainstones. These cycles are the record of successive shoaling-upward cycles of sedimentation on a shallow marine platform. The lower mudstone-wackestone sequence represents deposition in a shallow subtidal environment, and the upper oolitic-skeletal grainstone unit represents development of oolite shoals and tidal channels in very shallow waters. Terrigenous clastic sediments brought into the basin by the Michigan river periodically encroached into the marine environment. Dolomitization of the fine-grained carbonate sediments is largely restricted to areas which are overlain by oolitic grainstones. In eastern Daviess County, indentification of the individual stratigraphic units in this interval is somewhat tenuous, but tracing the units from eastern Illinois into Indiana made correlation and identification of the individual stratigraphic units possible by using electric logs and sample descriptions.

• Research Organization: Indiana Univ., Bloomington
• OSTI ID: 6797793
• Report Number(s): CONF-8310301-
• Journal Information: Am. Assoc. Pet. Geol., Bull.; (United States), Vol. 67:9; Conference: American Association of Petroleum Geologists eastern section meeting, Carbondale, IL, USA, 3 Oct 1983
• Country of Publication: United States
• Language: English

Related Subjects

58 GEOSCIENCES
INDIANA
LIMESTONE
GEOLOGIC HISTORY
STRATIGRAPHY
CORRELATIONS
ELECTRIC LOGGING
HYDROCARBONS
MISSISSIPPIAN PERIOD
SEDIMENTATION
CARBONATE ROCKS
FEDERAL REGION V
GEOLOGIC AGES
GEOLOGY
NORTH AMERICA
ORGANIC COMPOUNDS
PALEOZOIC ERA
ROCKS
SEDIMENTARY ROCKS
USA
WELL LOGGING
580100* - Geology & Hydrology- (-1989)