Title page for ETD etd-05202008-115022


Type of Document Dissertation
Author Smith, Langhorne Bullitt
URN etd-05202008-115022
Title High-Resolution Sequence Stratigraphy of Late Mississippian (Chesterian) Mixed Carbonates and Siliciclastics, lliinois Basin
Degree PhD
Department Geosciences
Advisory Committee
Advisor Name Title
Read, James Fredrick Committee Chair
Bambach, Richard K. Committee Member
Eriksson, Kenneth A. Committee Member
Glover, Lynn III Committee Member
Goodwin, P. W. Committee Member
Keywords
  • Mississippian
  • sequence stratigraphy
  • mixed carbonatesiliciclastic
  • glacio-eustasy
Date of Defense 1996-11-01
Availability restricted
Abstract
Eight 4th-order (-400 k.y.) disconformity-bounded mixed carbonate-siliciclastic sequences were deposited in the tectonically-active, tide-dominated Illinois basin during

the Late Mississippian greenhouse to icehouse transition. Detailed, lithologic crosssections were constructed through the Chesterian Ste. Genevieve through Glen Dean interval which show an upward change in character from carbonate-dominated sequences bounded by caliche and breccia paleosols to mixed-carbonate siliciclastic sequences bounded by red, slickensided mudrock paleosols and incised valleys. The 4th-order sequences are composed of 5th-order parasequences that can be correlated basin-wide. Parasequences in the basal, dominantly carbonate sequences are composed of patchy ooid grainstone tidal ridge reservoir facies which interfinger with skeletal limestone and are capped by laterally extensive muddy carbonate units. Parasequences in the overlying mixed carbonate siliciclastic interval commonly have basal quartz sandstone valley fill and tidal sand ridge reservoir facies overlain by skeletal limestone and shale-dominated siliciclastics.

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