Stratigraphy of the Okaw in Southwestern Illinois

The Okaw division of the Chester (late Mississippian) series of southwestern Illinois which heretofore has been considered middle Chester in age, is shown to be separated into two mapable parts by a disconformity. The lower unit, Lower Okaw, is of middle Chester age and the higher portion, Upper Oka...

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Bibliographic Details
Published in:The Journal of geology 1934-08, Vol.42 (6), p.621-629
Main Author: Sutton, A. H.
Format: Article
Language:English
Subjects:
Alluvium
Limestones
Lithology
Outcrops
Paleontology
Quarries
Sandstones
Shales
Stratigraphy
Writers
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Summary:The Okaw division of the Chester (late Mississippian) series of southwestern Illinois which heretofore has been considered middle Chester in age, is shown to be separated into two mapable parts by a disconformity. The lower unit, Lower Okaw, is of middle Chester age and the higher portion, Upper Okaw, is of late Chester age. Each of these units is described and correlated on paleontologic, lithologic, and stratigraphie grounds with a definite portion of the standard Chester section of Hardin County, Illinois, and western Kentucky.
ISSN:0022-1376
1537-5269
DOI:10.1086/624217