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February 2019 Bulletin

A geophysical attempt to locate a potential cave in the near-vicinity of a water well at Anacacho Limestone setting, Medina County, TexasBy Mustafa Saribudak and Alf HawkinsEnvironmental Geophysics Associates, Austin, Texas Abstract Resistivity and natural potential (NP, also called self-potential) surveys were performed in the eastern part of Medina County, Texas. According to the geological data available, the Upper Cretaceous Anacacho limestone crops out at the study area.

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November Bulletin

Stratigraphic Architecture, Depositional Systems of the Mississippian Upper Barnett Two Finger Sand Interval, Midland Basin, Texas
By Justin V. Mauck1,2, Robert G. Loucks2, and David J. Entzminger3
1 Schlumberger Technology Corporation, 7220 W Hwy 20, Midland, Texas 79706, U.S.A
2 Bureau of Economic Geology, Jackson School of Geosciences, University of Texas at Austin, University Station, Box X, Austin, Texas 78713–8924, U.S.A.
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October 2018 Bulletin

Evaporites in the McKnight Formation: Evidence for a Miocene Age to Fresh Water Flushing of the Maverick Basin, Southwest TexasBy Mark E. Thompson and M. Jeff RidingsPetroleum GeologistsSan Antonio, Texas IntroductionThe Maverick Basin is a relatively small depositional basin of Mesozoic age located in extreme southwest Texas (Fig. 1). The basin originated in the Late Triassic to Early Jurassic as a rift basin created during the early formation of the Gulf of Mexico.

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September 2018 Bulletin

Luminescence chronology of a Mass Grave of Giant Gopher Tortoises (Gopherus hexagonatus), Willacy County, TX
By Randolph G. De La Garza¹² , Juan L. González¹, and Zhixiong Shen³
¹The University of Texas-Rio Grande Valley, Edinburg, Texas, U.S.A.
²Lund University, Lund, Sweden
³Coastal Carolina University, Conway, South Carolina, U.S.A.
 
Abstract
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May 2018 Bulletin

Bedrock Geology and Hydrostratigraphy of the Edwards and Trinity Aquifers Within the
Driftwood and Wimberley 7.5-Minute Quadrangles, Hays and Comal Counties, Texas
By Allan K. Clark and Robert R. Morris
U.S. Geological Survey
 
Abstract
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April 2018 Bulletin

Fault zone deformation and displacement partitioning in mechanically layered carbonates: The Hidden Valley fault, central Texas
David A. Ferrill, Alan P. Morris, Ronald N. McGinnis,
Kevin J. Smart, William C. Ward
Southwest Research Institute®, 6220 Culebra Road, San Antonio, Texas 78238, dferrill@swri.org
 
Acknowledgments
 
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March 2018 Bulletin

“Geologic Wonders Of West Texas”
Abridged Chapters 7-10
Donald P. McGookey
 
Volcanism across the Trans-Pecos Region of West Texas
Volcanism in the Trans-Pecos region of West Texas was limited to the period from 48 to 17 m.y. ago (late Eocene to Early Miocene times.) During this time volcanism was nearly continuous, but varied considerably in location, style, composition, volume and tectonic setting (Henry and McDowell, 1986).
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Februrary 2018 Bulletin

The Hydromorphic Evolution of the
Owl Mountain and Nolan Creek Provinces,
Fort Hood Military Installation, Texas
 
Faulkner, Melinda S.1; McBroom, Matthew W.2; Farrish, Kenneth W.3; Stafford, Kevin W.1
1: Department of Geology, Stephen F. Austin State University
2: Arthur Temple College of Forestry and Agriculture, Stephen F. Austin State University
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