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.
