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Paleoenvironment of the New Albany Shale Group ( Devonian- Mississippian) of Illinois.

January 1, 1980

The distribution of lithofacies was determined by wave energy, bottom oxygenation, and bottom topography in a deep water stratified anoxic basin. At the basin margin high energy, very shallow conditions are recorded by oolitic-skeletal grainstones and packstones with abundant brachiopods, crinoids and trilobites. Offshore, less agitated areas are represented by highly bioturbated carbonate wackestones, argillaceous quartz siltstones, and greenish-gray mudstones. Calcified invertebrates are generally rare, indicating dysaerobic conditions. Basinward, slope areas are characterized by olive-gray to black, weakly bioturbated shales commonly interbedded with thickly laminated black shales. Trace fossils are abundant. Anaerobic conditions prevailed in the deepest areas where finely laminated, undisturbed, pelagic black shales were deposited.- from Author

Citation Information

Publication Year 1980
Title Paleoenvironment of the New Albany Shale Group ( Devonian- Mississippian) of Illinois.
DOI
Authors R.M. Cluff
Publication Type Article
Publication Subtype Journal Article
Series Title Journal of Sedimentary Petrology
Series Number
Index ID 70012212
Record Source USGS Publications Warehouse
USGS Organization