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Trans-Pecos

Trans-Pecos

This arid and sparsely populated region contains some of the most exciting geology in Texas. While most of the state is quite flat and less than 2500 feet above sea level, the Trans-Pecos area experienced the Laramide Orogeny--resulting in Basin and Range topography--as well as extensive Tertiary volcanism and faulting. These events elevated the basins to about 4000 feet above sea level with mountain ranges that jut up 2000 to 3000 additional feet. The hydrology of the region is also of interest since most of it is characterized by internal drainage, that is, when most of the water evaporates and the remainder seeps into the basin fill to recharge aquifers. The Trans-Pecos boundaries are roughly defined on the south and west by the Rio Grande River, on the north by the thirty-second parallel (also the boundary with New Mexico), on the northeast by the western margins of the Pecos River valley, and on the southeast by the Edwards Plateau. See also our Big Bend page.

Resources

There are not very many online sources for the Trans-Pecos. However, Virtual Landscapes of Texas' presentation of the Dumble Survey includes some of the first mapping of the area, with W.H. von Streeruwitz's contribution:

Two UT Austin geology professors have excellent bibliographies for Trans-Pecos hydrology and igneous petrology:

For more information on the surrounding areas, see:

Akersten, William Andrew. Red Light Local Fauna (Blancan), Southeastern Hudspeth County, Texas, 1967. (MA)

Amsbury, David Leonard. Geology of Pinto Canyon Area, Presidio County, Texas, 1957. (PhD)

Anderson, Jay Earl Jr. Igneous Geology of the Central Davis Mountains, Jeff Davis County, Texas, 1965. (PhD)

Anan, Fayez Shaban. Petrology and Paleocurrent Study of the Dagger Flat (Cambrian), Marathon Basin, Texas, 1965. (MA)

Beall, Jennifer Lynn. Wolfcampian (Lower Permian) Platform and Basin Carbonates: Hueco Mountains and Midland Basin, West Texas, 1999. (MS)

Bell, James John. Geology of the Foothills of Sierra de Los Piños, Northern Chihuahua, Near Indian Hot Springs, Hudspeth County, Texas. 1963. (MA)

Bennett, Richard Edwin. Geology of East Bourland and Simpson Springs Mountains, Brewster County, Texas, 1959. (MA)

Berge, Timothy Bryan Swearingen. Structural Evolution of the Malone Mountains, Hudspeth County, Texas, 1981. (MA)

Bilbrey, Don Gene. Economic Geology of Rim Rock Country, Presidio County, Trans-Pecos, Texas, 1957. (MA)

Bjorklund, Thomas Keith. Structure of Horse Mountain Anticline (Southwest Extension), Brewster County, Texas, 1962. (MA)

Black, Jeffrey Warren. Hydrogeology of the Lobo and Ryan Flats Area, Trans-Pecos Texas, 1993. (MA)

Bobeck, Patricia A. Igneous Petrology and Structural Geology of Nine Point Mesa, Brewster County, Texas, 1985. (MA)

Boghici, Radu. Hydrogeological investigations at Diamond Y Springs and surrounding area, Pecos County, Texas, 1997. (MA)

Bradshaw, Lael Marguerite Ely. Conodonts from the Fort Peña formation, Marathon Basin, Brewster County, Texas, 1966. (PhD)

Braithwaite, Philip. Cretaceous Stratigraphy of Northern Rim Rock Country Trans-Pecos Texas, 1958. (MA)

Bramson, Emil. Trace-Element Study of Tertiary Volcanic Rocks from the Sierra Madre Occidental, Mexico to Trans-Pecos Texas, 1984. (M

Bridge, Thomas E. Contact Metamorphism in Siliceous Limestone and Dolomite in Marble Canyon and Geology of Related Intrusion, Culberson County, Trans-Pecos Texas, 1966. (PhD)

Bridges, Luther Wadsworth II. Revised Cenozoic History of Rim Rock Country, Trans-Pecos Texas, 1958. (MA)

Bristol, David A. Structural Evolution and Metamorphism of Mid-Proterozoic Basement in the Northwest Van Horn Mountains, Trans-Pecos Texas, 1987. (MA)

Brunson, Wallace Edward. Type Sections of Cox and Finlay Formations, Hudspeth County, Trans-Pecos Texas,1954. (MA)

Buongiorno, Benny. Handbook of Tierra Vieja Mountains, Presidio and Jeff Davis Counties, Trans-Pecos Texas, 1955. (MA)

Burt, Edward Ramsey III. Petrology of the Mitchell Mesa Rhyolite, Trans-Pecos Texas, 1970. (PhD)

Byrd, William Martin. The Geology of a Portion of the Combs Ranch, Brewster County, Texas, 1958. (MA)

Carlisle, Joel Christie. Economic Geology of Candelaria Area, Presidio County, Trans-Pecos Texas, 1955. (MA)

Cepeda, Joseph C. Geology and Geochemistry of the Igneous Rocks of the Chinati Mountains, Presidio County, Texas, 1977. (PhD)

Chapman, Jeannette Burgen. Hydrogeochemistry of the Unsaturated Zone of a Salt Flat in Hudspeth County, Texas, 1984. (MA)

Cobb, Robert Charles. Structural Geology of the Santiago Mountains between Pine Mountain and Persimmon Gap, Trans-Pecos Texas, 1980 (MA)

Coley, Katharine Lancaster. Structural Evolution of the Warwick Hills, Marathon Basin, West Texas, 1978. (MA)

Colton, Clark Roper. Igneous Geology of Rim Rock Country, Trans-Pecos Texas, 1957. (MA)

Connors, Harry Edward III. Structure of the Heart Mountain-Tinaja Spring Area, Brewster County, Texas, 1977. (MA)

Cotera, Augustus S. Jr. Petrology and Petrography and Mississippian-Pennsylvanian Tesnus Formation, Marathon Basin, Trans-Pecos Texas, 1962. (PhD)

Courme, Bruno Jean. Forward Seismic Modeling of a Shelf-to-Slope Carbonate Depositional Setting from Outcrop Data, the Abo Formation of Apache Canyon, West Texas, and Comparison to Its Subsurface Equivalent, Kingdom Abo Field, Midland Basin, 1999. (MS)

Crawley, Richard Alvin. Flood Effects on Sanderson Creek, Trans-Pecos Texas, June 11, 1965. (MA)

Darling, Bruce Kelly. Delineation of the Ground-Water Flow Systems of the Eagle Flat and Red Light Basins of Trans-Pecos Texas, 1997. (PhD)

Dasch, Ernest Julius Jr. Dike Swarm of Northern Rim Rock Country Trans-Pecos Texas, 1959. (MA)

Davis, Morgan Jefferson. Structure of Eastern Apache Mountains, Culberson County, Trans-Pecos Texas. Part I: Regional Structure. 1953. (MA)

Davis, Scott Daniel. Investigations Concerning the Nature of Earthquake Aftershocks and Earthquakes Induced by Fluid Injection. 1989. (PhD)

DeMis, William Dermot. Geology of the Hell's Half Acre, Marathon Basin, Texas. 1983. (MA)

Dickerson, Eddie Joe. Bolson Fill, Pediment, and Terrace Deposits of Hot Springs Area, Presidio County, Trans-Pecos Texas. 1966. (MA)

Dietrich, John William. Geology of Presidio-Ocotillo Area, Presidio County, Trans-Pecos Texas. 1965. (MA)

Dietrich, John William. Geology of Presidio Area, Presidio County, Texas. 1965. (PhD)

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Diggs, Timothy Neighbours. Sedimentology and Structural Geology of the Housetop Mountains-Castle Mountain Area, Marathon Basin, Trans-Pecos Texas. 1989. (MA)

Duchin, Ralph Charles. Pre-Cenozoic Stratigraphy of Candelaria Area, Presidio County, Trans-Pecos Texas. 1955. (MA)

Duncan, Mary Anne. Geology of the West Bourland Mountain Area, Marathon Basin, West Texas. 1987. (MA)

Ellworth, Ralph Irving. Geology of Southeastern Part of the Van Horn Mountains Trans-Pecos Texas. 1949. (MA)

Erdlac, Richard John. Structural Development of the Terlingua Uplift, Brewster and Presidio Counties, Texas, 1988. (PhD)

Everett, John Raymond. Post-Cretaceous Structural Geology Near Del Norte Gap, Brewster County, Texas, 1964. (MA)

Ferguson, John David. Structure of Porvenir Area, Trans-Pecos Texas, 1959. (MA)

Finley, Judge Dinsmore. Geologic Structure of Eastern Apache Mountains, Culberson County, Trans-Pecos Texas. Part II: Local Structure, 1954. (MA)

Fitchen, William Mills. Lower Permian Sequence Stratigraphy of the Western Delaware Basin Margin, Sierra Diablo, West Texas, 1997. (PhD)

Frantzen, Danie Ray. Oligocene Folding in Rim Rock Country, Trans-Pecos, Texas, 1958. (MA)

Fuller, Carla Marie Matherne. Fracture and Permeability Analysis of the Santana Tuff, Trans-Pecos Texas, 1990. (MA)

Gabaldón, Gilbert. A Hydrogeologic Characterization of the Presidio Bolson, Presidio County, Trans-Pecos Texas, 1991. (MA)

Gieger, Ronald Maney. Quitman Mountains Intrusion Hudspeth County, Texas, 1965. (MA)

Gorski, Daniel Everett. Geology and Trace Transition Element Variation of the Mitre Peak Area, Trans-Pecos Texas, 1970. (MA)

Gregory, James L. Volcanic Stratigraphy and K-Ar of the Manuel Benavides Area, Northeastern Chihuahua, Mexico, and Correlations with the Trans-Pecos Volcanic Province, 1981. (MA)

Grimes, Stephen Whiteford. The Grenville Orogeny in West Texas : Structure, Kinematics, Metamorphism and Depositional Environment of the Carrizo Mountain Group, 1999. (PhD)

Groat, Charles George. Geology of Presidio Bolson, Presidio County, Texas and Adjacent Chihuahua, Mexico, 1970. (PhD)

Gross, Robert Olvin. Geology of Sierra Tinaja Pinto and Cornudas Station Areas, Northern Hudspeth County, Texas, 1965. (MA)

Gustafson, Eric Paul. Carnivorous Mammals of the Late Eocene and Early Oligocene of Trans-Pecos Texas, 1977. (PhD)

Harris, John Michael. Oligocene Vertebrates from Western Jeff Davis County, Trans-Pecos Texas, 1967. (MA)

Hart, Margaret Alma. The Hydrogeology of the Davis Mountains, Trans-Pecos Texas, 1992. (MA)

Harvill, Martin Lavell. Hydrothermal Alteration in the Davis Mountains, Texas, 1961. (MA)

Havard, Charles Gentry. Geology of the Southwestern Part of the Van Horn Mountains, Trans-Pecos Texas, 1949. (MA)

Hay-Roe, Hugh. Geology of Wylie Mountains and Vicinity, Trans-Pecos Texas, 1958. (PhD)

Hempkins, William Brent. Geology and Petrography of the Sawtooth Mountain Area, Jeff Davis County, Texas, 1962. (MA)

Hennings, Peter Hill. Structural Studies of the Chihuahua Tectonic Belt. 1991. (PhD)

Hewitt, Edward Ringwood II. The Cretaceous Geology of the Northeastern Chispa Quadrangle, Trans-Pecos Texas, 1951. (MA)

Hicks, David Lee. Depositional Environments and Diagenesis of the Early Cretaceous Cox Sandstone, Finlay Mountains, Trans-Pecos Texas. 1997. (MA)

Hodges, Floyd Norman. Petrology, Chemistry and Phase Relations of the Sierra Prieta Nepheline-Analcime Syenite Intrusion, Diablo Plateau, Trans-Pecos Texas. 1975. (PhD)

Houser, John Foster. Structural Geology of Threemile Hill Area, Brewster County, Texas. 1967. (MA)

Hovorka, Susan Davis. Stratigraphy and Petrography of the Upper Chert and Shale Member, Caballos Formation, Brewster County, West Texas. 1981. (MA)

Humble, Emmett Arl. Cenozoic History of Northeastern Chispa Quadrangle, Trans-Pecos, Texas. 1951. (MA)

Kennedy, Edward Reynolds Jr. Geology of Needle Peak Area, Chispa Quadrangle, Trans-Pecos Texas. 1949. (MA)

Kraft, Jennifer Lucille. Structural Evolution of the Sunshine Springs Thrust Area, Marathon Basin, Texas. 1984. (MA)

LaFave, John Irwin. Groundwater Flow Delineation in the Toyah Basin of Trans-Pecos Texas. 1987. (MA)

Lampert, Leon Max. Stratigraphy of Presidio Area, Presidio County, Trans-Pecos Texas. 1953. (MA)

Laux, John Peter III. Mineralization Associated with the Quitman Mountains Intrusion, Hudspeth County, Texas. 1969. (MA)

Leason, Jonathan Oren. Structural Geology of the Horse Mountain Area, Marathon Basin, Texas. 1983. (MA)

Lehman, Thomas Mark. Stratigraphy, Sedimentology, and Paleontology of Upper Cretaceous (Campanian-Maastrichtian) Sedimentary Rocks in Trans-Pecos Texas, 1985. (PhD)

Lewis, Jean. Geology of Barillos Dome, Jeff Davis County, Trans-Pecos Texas. 1949. (MA)

Mankin, Charles John. Biostratigraphy of Tierra Vieja, Trans-Pecos Texas, 1955. (MA)

Mayer James Roger. The Role of Fractures in Regional Groundwater Flow: Field Evidence and Model Results from the Basin and Range of Texas and New Mexico. 1995. (PhD)

McCarthy, Jeremiah Francis. Cretaceous Ammonites of Shafter Area, Presidio County, Trans-Pecos Texas. 1953. (MA)

McCulloch, Richard P. Geology of Yellow Hill Quadrangle, Brewster County, Texas. 1977. (MA)

McFall, Clinton Carew. Permian Geology of Northeastern Chispa Quadrangle, Trans-Pecos Texas. 1952. (MA)

McGrew, Bill Judson. Petrography of Candelaria Area, Presidio County, Trans-Pecos Texas. 1955. (MA)

McIntire, William Leigh. Geology of Vieja Pass Area, Tierra Vieja Mountains, Trans-Pecos Texas. 1950. (MA)

McKinney, Robert Geers. Petrology of Eruptive Rocks of Porvenir Area, Presidio County, Trans-Pecos Texas. 1957. (MA)

McKnight, John Forrest. Geology of Bofecillos Mountains Area, Trans-Pecos Texas. 1968. (PhD)

Miller, Mary Stewart. Squamates of the Campanian Terlingua Local Fauna, Brewster County, Texas. 1997. (MA)

Miller, Wayne David. Pre-Cenozoic Stratigraphy of Porvenir Area, Presidio County, Trans-Pecos Texas. 1957. (MA)

Milton, Arnold Powell. Geology of Cajoncito Area in Municipio de Guadalupe, Chihuahua, and Hudspeth County, Texas. 1964. (MA)

Moran, Sidney Stuart. Structure of Candelaria Area, Presidio County, Trans-Pecos Texas. 1955. (MA)

Murrah, William Eugene. Geology of Cherry Canyon Area, Tierra Vieja Mountains, Trans-Pecos Texas. 1950. (MA)

Noble, Paula Jane. Biostratigraphy and Depositional History of the Caballos Novaculite and Tesnus Formation, Marathon Uplift, West Texas. 1993. (PhD)

Parker, Donnie Franklin Jr. Petrology and Eruptive History of an Oligocene Trachytic Shield Volcano, Near Alpine, Texas. 1976. (PhD)

Peterson, James Eugene. Cenozoic Stratigraphy of Candelaria Area Presidio County, Trans-Pecos Texas. 1955. (MA)

Potter, Lee Shefte. Chemical and Isotopic Variation Along Strike in the Eastern Alaklic Belt, Trans-Pecos Magmatic Province, Texas and New Mexico, 1996. (PhD)

Powell, James Daniel. Stratigraphy of Cenomanian-Turonian (Cretaceous) Strata, Northeastern Chihuahua and Adjacent Texas. 1961. (PhD)

Rahnis, Michael Allen. Radiaxial Calcite in the Capitan Formation, Texas and New Mexico. 1995. (MA)

Ramsey, John William Jr. Perdiz Conglomerate, Presidio County, Texas. 1961. (MA)

Reaser, Donald Frederick. Geology of Cieneguilla Area, Chihuahua and Texas. 1974. (PhD)

Reiber, Derek Nicholas. GPS Measurements in West Texas. 1995. (MA)

Reid, Jeffrey Clinton. Hazel Formation, Culberson and Hudspeth Counties, Texas. 1974. (MA)

Richey, Charles Irwin. Canning Ridge Intrusion, Culberson County, Texas. 1961. (MA)

Rix, Cecil Charles. Petrography, Northern Davis Mountains, Trans-Pecos Texas. 1951. (MA)

Rix, Cecil Charles. Geology of Chinati Peak Peak Quadrangle, Trans-Pecos Texas. 1953. (PhD)

Rogers, William Brokaw. Depositional environments of the Skinner Ranch and Hess Formations (Lower Permian) Glass Mountains, West Texas. 1972. (PhD)

Schulenberg, John Theodore. Cenozoic Stratigraphy of Rim Rock County, Trans-Pecos Texas. 1958. (MA)

Schuster, Stefan Karl. Hydrogeology and Local Recharge Analysis in the Toyah Basin Aquifer. 1997. (MA)

Sewell, Charles Robertson. Igneous Petrology of Candelaria Area, Presidio County, Texas. 1955. (MA)

Smith, Michael Alexis. Geology and Trace Element Geochemistry of the Fort Davis Area, Trans-Pecos Texas. 1975. (PhD)

Smyth-Boulton, Rebecca Chappell. Porosity and Permeability Controls in the Santana Ash-Flow Tuff, Trans-Pecos, Texas. 1995. (MA)

St. John, Billy Eugene. Structural Geology of Black Gap Area, Brewster County, Texas. 1965. (PhD)

Strain, William Samuel. Blancan Mammalian Fauna and Pleistocene Formations, Hudspeth County, Texas. 1964. (MA)

Sullins, Charles Jefferson. Red Hills Intrusion, Northern Hudspeth County, Texas. 1971. (MA)

Tauvers, Peter Rolfs. Structure Sections Through the Marathon Basin, Trans-Pecos Texas: Implications for Basement-Influenced Deformation. 1988. (PhD)

Taylor, Dennis Ritch. Stratigraphy of the Gomez Peak Area, Trans-Pecos Texas, 1952. (MA)

Testarmata, Margaret M. Magnetostratigraphy of the Eocene-Oligocene Vieja Group, Trans-Pecos Texas, 1978. (MA)

Thompson, Marvin Gary. Depositional Environments of the Maxon Formation, Lower Cretaceous, Marathon Region, West Texas. 1977. (MA)

Throop, Robert Neblett. Geology of the Northern Tierra Vieja Mountains, Trans-Pecos Texas. 1949. (MA)

Turich, Courtney Hanna. Paleoecology and Diagenesis of the Lower Capitan Reef Slaughter Canyon, Guadalupe Mountains, New Mexico. 2000. (MS)

Twiss, Page Charles. Geology of Van Horn Mountains, Trans-Pecos Texas. 1959. (PhD)

Uliana, Matthew Martin. Delineation of Regional Groundwater Flow Paths and their Relation to Structural Features in the Salt and Toyah Basins, Trans-Pecos Texas. 2000. (PhD)

Underwood, James Ross. Geology of Eagle Mountains and Vicinity, Trans-Pecos Texas. 1962. (PhD)

Wade, Don Earl. Is Fredericksburg Group a Practical Unit in Trans-Pecos Texas? 1954. (MA)

Walton, Anne Helene. Magnetostratigraphy and the Ages of Bridgerian and Uintan Faunas in the Lower and Middle Members of the Devil's Graveyard Formation, Trans-Pecos Texas. 1986. (MA)

Weil, Anne Inger. The Terlingua Local Fauna Stratigraphy, Paleontology, and Multituberculate Systematics. 1992. (MA)

Wheeler, Joseph Orby. Geology of Northeastern Front of Davis Mountains, Trans-Pecos Texas. 1956. (MA)

Wiley, Michael Alan. Correlation of Geology with Gravity and Magnetic Anomalies, Van Horn-Sierra Blanca Region, Trans-Pecos Texas. 1970. (PhD)

Witebsky, Susan Nadine. Paleontology and Sedimentology of the Haymond Boulder Beds (Martin Ranch), Marathon Basin, Trans-Pecos Texas. 1987. (MA)

Wolleben, James Anthony. Biostratigraphy of the Ojinaga and San Carlos Formations of West Texas and Northeastern Chihuahua. 1966. (PhD)

Wood, John William. Geology of Apache Mountains, Trans-Pecos Texas. 1965. (PhD)

Woodward, John Eylar. Geology of Killam Deep Test Near Valentine, Jeff Davis County, Trans-Pecos Texas. 1954. (MA)

Young, Leonard Maurice. Sedimentary Petrology of the Marathon Formation (Lower Ordovician), Trans-Pecos Texas. 1968. (PhD)

Zinn, Robert Leonard. Cenozoic Geology of Presidio Area, Presidio County, Trans-Pecos Texas. 1953. (MA)

Trans-Pecos Region, Southeastern New Mexico and West Texas: New Mexico Geological Society, Thirty-First Field Conference, 1980.

The Border Region: New Mexico Geological Society Twentieth Field Conference Guidebook, 1969.

Guadalupe Mountains Field Guide, 1981.

Cenozoic Geology of the Trans-Pecos Volcanic Field of Texas: Conference Proceedings and Guidebook. BEG Guidebook 19, 1978.

Igneous Geology of Trans-Pecos Texas: Field Guide and Research Articles, 1986.

Hydrogeology of Trans-Pecos Texas. BEG Guidebook 25, 1990.

Guide to the Permian Reef Geology Trail: McKittrick Canyon, Guadalupe Mountains National Park, West Texas. BEG Guidebook 26, 1993.

Wolfcampian-Leonardian Shelf Margin Facies of the Sierra Diablo: Seismic Scale Models for Subsurface Exploration: The 1995 Annual Field Trip. West Texas Geological Society Publication 95-97, 1995.

Geology of the Big Bend and Trans-Pecos, Texas. South Texas Geological Society Field Trip Guidebook, 1990.

Field Guide for AAPG Hedberg Field Research Conference: Deep-Water Sandstones, Brushy Canyon Formation, West Texas, 1999.

A Geologic Field Guide to the Davis Mountains, 1997. Lacy, Brandee.(MA, Baylor University)

Tectonics and Paleozoic Facies of the Marathon Geosyncline, West Texas: 1978 Field Conference Guidebook. SEPM Publication 78-17, 1978.

Geology of the Sierra Diablo and Southern Hueco Mountains, West Texas: May 1983 Field Conference Guidebook. SEPM Publication 83-22, 1983.

Geologic Guide to the Western Escarpment, Guadalupe Mountains, Texas: A Road Log and Trail Guide. SEPM Publication 88-30, 1988.

Sequence Stratigraphy, Facies, and Reservoir Geometrics of the San Andreas, Grayburg, and Queen Formations, Guadalupe Mountains, New Mexico and Texas. SEPM Publication 91-32, 1991.

Carbonate Facies and Sequence Stratigraphy: Practical Applications of Carbonate Models. SEPM Publication 95-36, 1995.

Carbonate slope styles: Examples from the Permian of the Guadalupe Mountains: PBS-SEPM field trip, April 4-6, 2008.

The Davis Mountains Volcanic Field: A guidebook for the Southwestern Association of Student Geological Societies, 1991.

Peralkalic Rhyolite of the Davis Mountains and Big Bend Areas, Texas: Field Trip Number One, 2000.

Carbonates of the Guadalupe and Sacramento Mountains: 1997 International Field Trip Exchange, 1997.

Structure and Stratigraphy of Trans-Pecos Texas: El Paso to Guadalupe Mountains and Big Bend, 1989.

A Guidebook to the Stratigraphy, Sedimentary Structures and Origin of Flysch and Pre-Flysch Rocks of the Marathon Basin, 1969.

Marathon-Marfa Region of West Texas-Symposium and Guidebook: Permian Basin Section Society of Economic Paleontologists and Mineralogists, 1981.

Petroleum Geology of the Guadalupe Mountains, Texas and New Mexico: Field Trip Guidebook, 1999.

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Origin of Silver-Copper-Lead Deposits in Red-Bed Sequences of Trans-Pecos Texas, BEG Report of Investigations 145, 1985.

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Neotectonic History and Structural Style of the Campo Grande Fault, Hueco Basin, Trans-Pecos Texas. BEG Report of Investigations 196.

Geology of the Infernito Caldera and Magmatic Evolution of the Chinati Mountains and Vicinity, Trans-Pecos Texas. BEG Report of Investigations 206, 1992.

Geology of the Solitario Dome, Trans-Pecos Texas: Paleozoic, Mesozoic, and Cenozoic Sedimentation, Tectonism, and Magmatism. BEG Report of Investigations 240, 1996.

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Compilation of Potassium-Argon Ages of Tertiary Igneous Rocks, Trans-Pecos Texas. BEG Circular 86-2, 1986

Integration of Ground Water and Vadose Zone Geochemistry to Investigate Hydrochemical Evolution. BEG Circular 90-5, 1990.

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