An eolian facies in the Ste. Genevieve Limestone of southern Indiana

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Abstract

Cross-bedded oolitic grainstones in the Ste. Genevieve Limestone (Mississippian) of the Illinois basin have generally been considered to be shallow marine. However, fine- to medium-grained cross-bedded grainstones of mixed clast type in the Ste. Genevieve of Harrison County, southern Indiana, are here interpreted to be of eolian dune origin on the basis of small-scale sedimentary structures, particularly climbing-wind-ripple structures. In addition, subaerial exposure of surfaces at the tops and bases of the eolian units is indicated by pedogenic features such as in-situ breccias and rhizoliths. Associated skeletal and oolitic grainstones of marine origin are distinguished from the eolian grainstones by the presence of pebble-sized fossils. The presence of several interva s of eolian deposits in the Ste. Genevieve is probably a result of eustatic sea level fluctuations.

Additional publication details

Publication type Book chapter
Publication Subtype Book Chapter
Title An eolian facies in the Ste. Genevieve Limestone of southern Indiana
Year Published 1993
Language English
Publisher American Association of Petroleum Geologists
Description 18 p.
Larger Work Type Book
Larger Work Title Mississippian oolites and modern analogs
First page 31
Last page 48