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22–25 SEPTEMBER  PHOENIX, ARIZONA, USA

T58. Late Cretaceous to Early Paleogene structural geology, paleomagnetism, geochronology, and geo-
Tectonic Development of the North American morphology to address grand challenges and celebrate his
Cordillera commitment to the scientific community are encouraged.
Cosponsors: GSA Structural Geology and Tectonics Division; GSA
Sedimentary Geology Division; GSA Mineralogy, Geochemistry, T62. Exploring Connections between
Petrology, and Volcanology Division; GSA Geochronology Extension, Sedimentation, and Volcanism in
Division; GSA Geophysics and Geodynamics Division the Rio Grande Rift
Disciplines: Tectonics/Tectonophysics, Structural Geology, Cosponsors: GSA Structural Geology and Tectonics Division;
Stratigraphy GSA Sedimentary Geology Division; GSA Geophysics and
Advocates: John S. Singleton; Scott M. Johnston; Emily S. Geodynamics Division; New Mexico Geological Society;
Finzel; David M. Pearson Southern Rift Institute–New Mexico State University
Subduction-related magmatism, underplating, orogenesis, and Disciplines: Tectonics/Tectonophysics, Stratigraphy, Volcanology
margin-parallel translation characterized the North American Advocates: Brian A. Hampton; Jeffrey M. Amato; Reed J.
Cordillera in the Late Cretaceous–early Paleogene. This tecton- Burgette; Emily R. Johnson
ics-focused session will highlight new insights from Alaska to This cross-disciplinary session explores emerging ideas about
Mexico, including plate motion/geometry, deformation, magma- tectonic processes that shaped the Eocene–present evolution of
tism, and sedimentation. the Rio Grande rift in southwestern North America. Studies
utilizing structural geology, volcanology, sedimentology, geo-
T59. Integrated Tectono-Sedimentary chronology, and geophysics are encouraged.
Records in the Tibetan Plateau and Adjacent Areas
Cosponsors: GSA Sedimentary Geology Division; GSA T63. Subduction Top to Bottom 2 (ST2B-2),
International Modern and Ancient
Disciplines: Tectonics/Tectonophysics, Sediments, Clastic, Cosponsor: GSA Structural Geology and Tectonics Division
Stratigraphy Discipline: Tectonics/Tectonophysics
Advocates: Feng Cheng; Andrew V. Zuza; Ryan J. Leary Advocates: David W. Scholl; Gray E. Bebout; Robert J. Stern;
This session provides an opportunity to present new results Laura Wallace
and integrate them into a comprehensive understanding of the This session presents geological, geophysical, geochemical,
dynamics of tectono-sedimentary systems in the Tibetan Plateau and theoretical advancements and promising directions for sub-
and adjacent areas. duction zone research, emphasizing the study of both modern
(active) subduction zones and rock bodies thought to be ancient
T60. Initiation of Plate Boundaries: Insights (fossil) ones.
from Geologic, Geophysical, and Numerical
Modeling Studies T64. Celebrating the Legacy of Professor
Cosponsors: GSA Structural Geology and Tectonics Division; Eldridge Moores in Global Tectonics and
GSA Quaternary Geology and Geomorphology Division Societal Relevance of Geosciences
Disciplines: Tectonics/Tectonophysics, Structural Geology, Cosponsors: GSA History and Philosophy of Geology Division;
Petrology, Igneous GSA Structural Geology and Tectonics Division; GSA Geology
Advocates: Timothy M. Kusky; Zhong-Hai Li; Erdin Bozkurt; and Society Division; GSA Mineralogy, Geochemistry,
Osman Parlak; John F. Dewey Petrology, and Volcanology Division; GSA International;
A major unsolved problem in geodynamics is how plate bound- Geological Society of London; Geological Society of China
aries initiate. We will bring together geologists, geophysicists, Disciplines: Tectonics/Tectonophysics, History and Philosophy
and numerical modelers to document examples of plate boundary of Geology, Geoscience and Public Policy
initiation and test their viability using numerical models. Advocates: Yildirim Dilek; John Wakabayashi
We welcome contributions on all aspects of global tectonics,
T61. Fossil Magnetism and Paleopoles; ophiolites, orogenic belts, Precambrian geology, and science for
Tectonics, Stratigraphy, Geochronology, and society to reflect on the scientific impact of Eldridge Moores on
Geomorphology; Geoscience Challenges and our research and to celebrate his distinguished career.
Education: A Celebration of John Geissman’s
Career PRECAMBRIAN GEOLOGY
Cosponsors: GSA Structural Geology and Tectonics Division;
GSA Geophysics and Geodynamics Division; GSA Sedimentary T65. Precambrian Linkages across Laurentia:
Geology Division; GSA Quaternary Geology and Looking for Geological, Geophysical, and
Geomorphology Division; GSA Geochronology Division Paleogeographic Connections and Controversies
Disciplines: Tectonics/Tectonophysics, Geophysics/ Associated with the Growth and Tectonic
Geodynamics, Stratigraphy Evolution of Laurentia from the Neoarchean to
Advocates: Alexis K. Ault; Stephen S. Harlan the Neoproterozoic
This session celebrates the science and service legacy of Cosponsors: GSA Structural Geology and Tectonics Division;
John Geissman’s multifaceted career. Contributions combining GSA Mineralogy, Geochemistry, Petrology, and Volcanology

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