Smackover and Haynesville Facies Relationships in North-Central East Texas, by Sara K. Stewart, Pages 56 - 62
from:
East Texas Geological Society Publication: The Jurassic of East Texas, Edited by Mark W. Presley
Copyright 1984 by East Texas Geological Society. All rights reserved.

Smackover and Haynesville Facies Relationships in North-Central East Texas

Sara K. Stewart
Applied Carbonate Research Program,
Department of Geology, Louisiana State University,
Baton Rouge, Louisiana 70803

ABSTRACT

The Smackover Formation was deposited as a coarsening-upward carbonate wedge that developed first with the deposition of transgressive laminated, silty limes across a ramp surface, followed by the deposition of mudstones and wackestones in relatively deep waters as the rate of sea level rise slowed. As the carbonate system shoaled, packstones and grainstones were deposited. Local lenses of anhydrite were precipitated on the leeward side of the Smackover shelf break. During Haynesville time, the carbonate barrier at the shelf margin created restricted environments in which Buckner evaporites, carbonates, and terrigenous clastics were deposited. As the rate of sea level rise increased, Gilmer beds of ooid, peloid, and fossil limestones were deposited as far updip as the present-day Mexia-Talco fault system.