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The AAPG/Datapages Combined Publications Database

AAPG Bulletin


Volume: 68 (1984)

Issue: 9. (September)

First Page: 1214

Last Page: 1214

Title: New Reference Locality for Saratoga Chalk, Howard County, Arkansas: ABSTRACT

Author(s): Randal J. Landry


The Saratoga Chalk (Navarro Group, Gulf Series, Upper Cretaceous) crops out in a narrow band trending northeast-southwest through Howard, Hempstead, Pike, and Clark Counties, southwest Arkansas. The Saratoga Chalk is a fossiliferous, hard, sandy chalk, somewhat glauconitic in composition, with thin beds of marly chalks and chalky sands scattered through the formation. Lying disconformably on the Marlbrook Marl, the basal contact is quite distinctive owing to a persistent break in lithology and faunal types. The overlying Nacatoch sandstone disconformably overlies the Saratoga Chalk.

The outcrop, located in Sec. 32, T11S, R27W, approximately 0.5 mi (800 m) west of the Saratoga townsite, provides a complete, easily accessible exposure of the Saratoga Chalk (here 24 ft or 7 m thick) within 1 mi (1.6 km) of the type locality. This new reference locality will complement the poor exposure of the formation at the type locality at Saratoga, Arkansas.

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