An eolian facies in the Ste. Genevieve Limestone of southern Indiana
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.
Citation Information
Publication Year | 1993 |
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Title | An eolian facies in the Ste. Genevieve Limestone of southern Indiana |
Authors | R. E. Hunter |
Publication Type | Book Chapter |
Publication Subtype | Book Chapter |
Index ID | 70186699 |
Record Source | USGS Publications Warehouse |