204 Paleozoic Tectonics of SW Laurentia Without Borders: Final Amalgamation of Pangea in the USA, Mexico, and South America

We invite contributions that explore the Paleozoic tectonic evolution of southwestern Laurentia during the final assembly of western Pangea. Research on Paleozoic tectonic belts in Gondwana, particularly from Mexico and South America, is especially welcome.

Tuesday, 21 October 2025
1:30 PM - 5:30 PM
HBGCC, 217B

Participants

• Chair Sandra Juárez-Zúñiga
• Chair Daniel Stockli
• Chair N. Betania Palacios-García
• Chair Tyson Smith
• Chair Elisa Fitz-Diaz

Presentations

• 1:35 PM
  Beyond West Texas: Extending Late Paleozoic Continental Collision to Pangea's Far Western Margin in Western Mexico and the Apparent Conundrum of Missing Orogenic Hinterland
  Timothy Lawton, Bureau of Economic Geology, University of Texas (retired), Tucson, AZ
  412622 (Technical Sessions)
• 1:55 PM
  Role of Tectonic Inheritance in the Western Delaware Basin of Texas
  Elizabeth Horne, University of Texas at Austin, Austin, TX and Peter Hennings, University of Texas at Austin, Austin, TX and Daniel Stockli, University of Texas at Austin, Austin, TX
  413790 (Technical Sessions)
• 2:55 PM
  Stratigraphic and provenance variations in the Pennsylvanian Bird Spring and Keeler Basins, east-central California: Implications for Ancestral Rocky Mountain tectonism and continental-scale paleodrainage patterns
  Joshua Malone, University of Texas at Austin, Austin, Texas and Timothy Lawton, University of Texas at Austin, Austin, Texas and Xavier Janson, University of Texas at Austin, Austin, Texas and Buddy Price, Devon Energy, Oklahoma City, Oklahoma
  412319 (Technical Sessions)
• 3:25 PM
  Continental Levering Explains up to ~30% Variation in Magnitude of Pennsylvanian Sea Level Cycles Observed in Cyclic Stratigraphy
  Ryan Leary, New Mexico Institute of Mining and Technology, Socorro, NM and Sophie Coulson, University of New Hampshire, Durham, NH
  413898 (Technical Sessions)
• 3:45 PM
  Provenance of Pennsylvanian turbidites from the Sonora allochthon, Sonora, northwestern Mexico: new insights into the westernmost end of the late Paleozoic trans-Pangean belt
  Michelangelo MARTINI, Universidad Nacional Autonoma de Mexico, Mexico City and Juan Moisés Casas Peña, Universidad Nacional Autonoma de Mexico, Mexico City and Pilar Navas-Parejo, Universidad Nacional Autonoma de Mexico, Mexico City and Nancy Riggs, Northern Arizona University, Flagstaff
  412621 (Technical Sessions)
• 4:00 PM
  Detrital zircon provenance records of the late Paleozoic Pedregosa Basin in Chihuahua, Mexico, and implications for the final assembly of Pangea
  Sandra Juárez-Zúñiga, Jackson School of Geosciences, The University of Texas at Austin, Austin, Texas and Daniel Stockli, Jackson School of Geosciences, The University of Texas at Austin, Austin, Texas
  413701 (Technical Sessions)
• 4:15 PM
  Structural-geochronological record of progressive deformation through U-Pb in tectonic calcite veins in the Chicomuselo Fold and Thrust Belt, SE Mexico: Evidence for the amalgamation and the breakup of Western Pangea
  N. Betania Palacios-García, Posgrado en Ciencias de la Tierra, Coyoacán, Ciudad de México and Elisa Fitz-Díaz, Instituto de Geología, Coyoacán, CDMX and Lisa D. Stockli, Jackson School of Geosciences, Austin, Texas and Daniel F. Stockli, Jackson School of Geosciences, Austin, Texas and Bernardo I. García-Amador, Instituto de Geofísica, Coyoacán, CDMX
  412053 (Technical Sessions)
• 4:30 PM
  The Motozintla Shear Zone suture, its role in the last stages of equatorial Pangea’s assembly and later break up
  M. Albán Albarrán-Santos, UNAM, Coyoacán, Mexico City and Elisa Fitz-Díaz, UNAM, Coyoacan, Mexico City and Mario Ramos-Arias, Instituto Politécnico Nacional, Gustavo A. Madero, Mexico City
  413568 (Technical Sessions)
• 4:45 PM
  THE NUEVA INDEPENDENCIA FORMATION: THE FIRST RECORD OF UPPER TRIASSIC-LOWER JURASSIC MARINE FACIES AT SOUTHERN MEXICO
  Maria De Los Angeles Verde-Ramírez, UNAM, Iztacalco, CDMX and Elisa Fitz-Diaz, UNAM, Mexico City, Mexico City and Daniel Stockli, Jackson School of Geosciences, Austin, Texas and Daniel Ruíz-Arriaga, The University of Texas at Austin, Austin, Texas
  412036 (Technical Sessions)