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The AAPG/Datapages Combined Publications Database

AAPG Bulletin


Volume: 47 (1963)

Issue: 2. (February)

First Page: 369

Last Page: 369

Title: Dimple Limestone Microfossils from the Marathon Region of Texas: ABSTRACT

Author(s): G. A. Sanderson, W. E. King

Article Type: Meeting abstract


Several exposures of the Dimple limestone in the western part of the Marathon region of Texas contain microfossils indicative of a shallow-water carbonate shelf biocoenose. Diagnostic microfossils include species of the fusulinid genera Millerella, Staffella, Eochubertella, ?Profusulinella and Fusulinella, as well as algae and smaller Foraminifera. The fusulinids demonstrate that the Dimple Limestone is, at least in part, no older than Bendian (Atokan).

The limestone beds examined from the western and northwestern parts of the Marathon region consists, in part, of grainstones containing fossil fragments which indicate exposure to wave action. Graded bedding is generally absent, in contrast to the well graded turbidite beds (Thomasson and Thomson, 1963) on the east and southeast which contain redeposited, shallow-water benthonic fossils. Whether the western outcrops comprise redeposited material or in situ shelf sediments, the contained fossils establish at least a maximum age limit for the beds.

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