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25–28 OCTOBER • MONTRÉAL, QUÉBEC, CANADA
T7. Fieldwork, Maps, and Orogenies: A Tribute T11. Recent Advances in Supercontinents: Paleoge-
Session for Marc St-Onge ography, Geodynamics, and Paleoclimate Evolution
Cosponsors: GSA Mineralogy, Geochemistry, Petrology, and Cosponsors: IGCP Project No. 648: Supercontinent Cycles and
Volcanology Division; GSA Structural Geology and Tectonics Global Geodynamics; GSA Structural Geology and Tectonics
Division Division
Disciplines: Tectonics/Tectonophysics, Petrology, Metamorphic, Disciplines: Tectonics/Tectonophysics, Geophysics/Geodynamics,
Precambrian Geology Precambrian Geology
Advocates: Benoit M. Saumur; Brendan Dyck; Daniele Regis; Advocates: Lei Wu; Galen P. Halverson; J. Brendan Murphy
Diane Skipton; Michael P. Searle This session highlights multidisciplinary contributions toward a
Celebrating the career of Dr. St-Onge, this session welcomes better understanding of cyclic assembly and breakup of supercon-
submissions reflecting his research: field-based studies of the tinents and their interplay with mantle dynamics, paleoclimate,
Canadian Arctic and the Himalaya, metamorphic studies dedi- and paleoenvironment during the past two billion years.
cated to orogenic processes, and integrative regional mapping.
T12. Assembling Laurentia: Neoproterozoic to
T8. From Rodinia to Pangea: Evolution of the Cambrian Rifting and Continental Margin Evolu-
Appalachian-Caledonian Orogen tion during Breakup of Rodinia and Pannotia
Cosponsors: GSA Structural Geology and Tectonics Division; Cosponsors: GSA Structural Geology and Tectonics Division;
GSA Mineralogy, Geochemistry, Petrology, and Volcanology GSA Sedimentary Geology Division; GSA Mineralogy,
Division; GSA Geochronology Division Geochemistry, Petrology, and Volcanology Division; GSA
Disciplines: Tectonics/Tectonophysics, Petrology, Metamorphic, Geophysics and Geodynamics Division; Mineralogical Society
Geochronology of America
Advocates: Chong Ma; Paul A. Mueller; Paul Karabinos; David Disciplines: Tectonics/Tectonophysics, Stratigraphy, Precambrian
A. Foster; Cees R. van Staal Geology
We seek contributions addressing the structural, magmatic, Advocates: Francis A. Macdonald; Adolph Yonkee
metamorphic, and/or sedimentary evolution of the Appalachian- The session focuses on Neoproterozoic tectonic, petrologic, and
Caledonian orogen from Svalbard to Alabama, and from the sedimentologic evolution of the margins of Laurentia during rift-
breakup of Rodinia through the assembly and dispersal of Pangea. ing of Rodinia and Pannotia, including associated environmental
changes such as Snowball Earth and the appearance of animals.
T9. Assembling Laurentia: GEON 14 Enigmas and
Advances in Understanding the Crustal Evolution and T13. Some Like It HOT: The Role of Late Extension-
Paleogeography of the Early Mesoproterozoic North al Tectonics in Collisional Orogens, with Special
America Emphasis on the Grenville Orogen
Cosponsors: GSA Mineralogy, Geochemistry, Petrology, and Cosponsors: GSA Structural Geology and Tectonics Division;
Volcanology Division; GSA Geochronology Division; GSA GSA Mineralogy, Geochemistry, Petrology, and Volcanology
Geophysics and Geodynamics Division; Mineralogical Society of Division; GSA Geophysics and Geodynamics Division; GSA
America; GSA Sedimentary Geology Division; GSA Structural Sedimentary Geology Division; GSA Structural Geology and
Geology and Tectonics Division Tectonics Division
Disciplines: Tectonics/Tectonophysics, Precambrian Geology, Disciplines: Tectonics/Tectonophysics, Petrology, Metamorphic,
Petrology, Metamorphic Geochronology
Advocates: Christopher G. Daniel; Aphrodite Indares; David P. Advocates: Erkan Toraman; Michelle Markley; Toby Rivers
Moecher This session covers the extensional collapse phase of large hot
This session will focus on the development and evolution of the orogens, with a focus on the Grenville Orogen. We welcome con-
Andean-scale, Mesoproterozoic 1.4 Ga Laurentian margin, and to tributions involving structural, petrological, geo/thermochrono-
place the major magmatic, orogenic, ore deposits, and arc forming logical, geophysical, and modeling techniques, multidisciplinary
events in a broader and unified context. approaches, and comparisons with other orogens.

T10. Subduction Zone Slip Behavior: The Intersection T14. Strain in the Footwalls of Detachment Faults:
of Deformation and Metamorphism New Insights on the 40th Anniversary of the Semi-
Cosponsors: GSA Structural Geology and Tectonics Division; nal GSA Memoir Cordilleran Metamorphic Core
GSA Mineralogy, Geochemistry, Petrology, and Volcanology Complexes
Division Cosponsor: GSA Structural Geology and Tectonics Division
Disciplines: Tectonics/Tectonophysics, Petrology, Metamorphic, Disciplines: Tectonics/Tectonophysics, Structural Geology,
Structural Geology Geophysics/Geodynamics
Advocates: Alissa Kotowski; Caroline Seyler; Cailey B. Condit Advocates: James J. Vogl; John S. Singleton; Rory R. McFadden
During subduction, rocks occupying the plate interface experi- Forty years after publication of GSA Memoir 153, Cordilleran
ence progressive changes due to diagenesis and metamorphism Metamorphic Core Complexes, questions remain regarding the
that influence their rheology. This session will investigate the kinematics, rates, and dynamic significance of strain in footwalls
interplay between deformation and metamorphism and its influ- and detachments. This session addresses these problems through
ence on slip behavior across space and time. contributions from field, analytical, and modeling studies.
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