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

Journal of Sedimentary Petrology

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Abstract

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

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Paleoenvironment of the New Albany Shale Group ( Devonian- Mississippian) of Illinois.
Series title:
Journal of Sedimentary Petrology
Volume
50
Issue:
3
Year Published:
1980
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Journal of Sedimentary Petrology
First page:
767
Last page:
780
Number of Pages:
14