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The AAPG/Datapages Combined Publications Database

AAPG Bulletin

Abstract

Volume: 23 (1939)

Issue: 9. (September)

First Page: 1393

Last Page: 1403

Title: Jackson Eocene from Borings at Greenville, Mississippi

Author(s): H. N. Fisk (2)

Abstract:

The occurrence of Jackson beds at shallow depth beneath Greenville, Mississippi, furnishes an important clue to subsurface structural conditions under the broad alluvially masked Mississippi River valley. Borings recently drilled there by the Mississippi River Commission passed through approximately 100 feet of Recent alluvium before penetrating fossiliferous Jackson Eocene sediment. Samples from the borings, studied for microfossils, indicate that the Jackson beds comprise the lower part of the Textularia hockleyensis zone and the upper part of the Textularia dibollensis zone. The contact of these zones dips westward toward the Arkansas syncline whose axis can be traced southward around the eastern margin of the Monroe uplift. The date of synclinal downwarping of the Jac son beds is considered to be Miocene.

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