Alan Chapman
Macalester College, St. Paul, MN
Activity
2025
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PROVENANCE OF CLASTIC ROCKS OF THE INNER HORNSUND TROUGH, SVALBARD: IMPLICATIONS FOR REGIONAL CORRELATIONS AND DEVONIAN PALEOGEOGRAPHY
33 Cordilleran and Other Orogenic Belt Evolution from Components to Whole (Posters)Friday, 4 April 20258:00 AM - 4:00 PMSierra Ballroom
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UNDERSTANDING FRANCISCAN COMPLEX SUBDUCTION ZONE RECYCLING VIA MICRO-SAMPLED GARNET GEOCHRONOLOGY FROM JENNER BEACH, CALIFORNIA
33 Cordilleran and Other Orogenic Belt Evolution from Components to Whole (Posters)Friday, 4 April 20258:00 AM - 4:00 PMSierra Ballroom
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ONSET OF SUBDUCTION ACCRETION IN THE FRANCISCAN COMPLEX VARIES ALONG STRIKE: NEW U-Pb DETRITAL ZIRCON INSIGHTS FROM THE SKAGGS SPRINGS AND GOAT MOUNTAIN SCHISTS
15 Cordilleran and Other Orogenic Belt Evolution from Components to WholeThursday, 3 April 20258:00 AM - 12:00 PMBalboa/Calaveras
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THERMOCHRONOLOGIC AND FAULT KINEMATIC CONSTRAINTS ON THE TIMING OF DEVELOPMENT OF THE EASTERN CALIFORNIA SHEAR ZONE IN SOUTHEASTERN CALIFORNIA
23 Cordilleran Tectonics: Integrating Field and Analytical Approaches I (Posters)Thursday, 3 April 20258:00 AM - 5:30 PMRiver/City View
2024
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IGNEOUS AND METAMORPHIC CHRONOLOGY OF SALINIAN ARC MIDDLE TO LOWER CRUST, CENTRAL CALIFORNIA COAST
T57 New Advances and Applications of CA-TIMS U/Pb Geochronology and CA Method in the Earth Sciences: A Session in Honor of James MattinsonSunday, 22 September 20241:30 PM - 5:30 PM212B
2023
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CORRELATION, PROVENANCE, AND ACCRETIONARY HISTORY OF FRANCISCAN AND RELATED UNITS IN NORTHERN CALIFORNIA AND SOUTHERN OREGON
15 From High Grade to Low Grade: Honoring the Contributions of J. Douglas Yule Towards Understanding the Growth and Active Deformation of Western North AmericaThursday, 18 May 20238:00 AM - 12:00 PMWhitney Peak Ballroom 2
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ZIRCON AND APATITE (U-TH)/HE THERMOCHRONOLOGY REQUIRES TWO-STAGE (EARLY CRETACEOUS AND MIOCENE) UPLIFT OF THE KLAMATH MOUNTAINS PROVINCE (SOUTHERN OREGON-NORTHERN CALIFORNIA)
15 From High Grade to Low Grade: Honoring the Contributions of J. Douglas Yule Towards Understanding the Growth and Active Deformation of Western North AmericaThursday, 18 May 20238:00 AM - 12:00 PMWhitney Peak Ballroom 2
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DETRITAL ZIRCON AGES FROM UPPER CRETACEOUS–PALEOGENE FOREARC AND SUBDUCTION-ZONE STRATA OF SOUTHERN CALIFORNIA AND ENVIRONS COMPARED TO CORDILLERAN IGNEOUS BASEMENT AGES: IMPLICATIONS FOR LARAMIDE TECTONICS
18 Late Jurassic to Eocene Tectonics of the North America Cordillera: Evolving and Emerging Models (Posters)Thursday, 18 May 20238:00 AM - 6:00 PMCargo Room
2022
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ZIRCON (U-TH)/HE CONSTRAINTS ON THE EXHUMATION OF THE PELONA-OROCOPIA-RAND SCHIST AND IMPLICATIONS FOR THE LATE CRETACEOUS TO NEOGENE TECTONIC DEVELOPMENT OF SW NORTH AMERICA
T163 Advances and Applications of Thermochronology in Tectonic, Magmatic, Basin, and Geomorphic Studies (Posters)Tuesday, 11 October 20229:00 AM - 1:00 PMExhibit Hall F
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RAMAN THERMOMETRY AND (U‐TH)/HE THERMOCHRONOMETRY REVEAL NEOGENE TRANSPRESSIONAL EXHUMATION IN THE NACIMIENTO BLOCK OF CENTRAL CALIFORNIA
T74 Advances and Applications of Thermochronology in Tectonic, Magmatic, Basin, and Geomorphic Studies IMonday, 10 October 20228:00 AM - 12:00 PM601
2021
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ZIRCON U-PB GEOCHRONOLOGY OF THE CONDREY MOUNTAIN SCHIST (NORTHERN CALIFORNIA-SOUTHERN OREGON) REVEALS A PREVIOUSLY UNDOCUMENTED EARLY CRETACEOUS CORDILLERAN SHALLOW/FLAT-SUBDUCTION EPISODE
T194 Insights into Cordilleran Tectonics and Magmatism from the Sedimentary Record (Posters)Tuesday, 12 October 20212:30 PM - 6:30 PMExhibit Hall A
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DETRITAL ZIRCON GEOCHRONOLOGY OF THE WESTERN BAJA TERRANE: CONSTRAINTS ON THE TIMING OF MESOZOIC SUBDUCTION AND ACCRETION IN BAJA CALIFORNIA
T162 Initiation and Evolution of Arc-Forearc Systems in Cascadia and Beyond (Posters)Tuesday, 12 October 20219:00 AM - 1:00 PMExhibit Hall A
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A CRUCIAL GEOLOGIC TEST OF LATE JURASSIC EXOTIC COLLISION VERSUS ENDEMIC RE-ACCRETION IN THE KLAMATH MOUNTAINS PROVINCE, WESTERN UNITED STATES, WITH IMPLICATIONS FOR THE ASSEMBLY OF WESTERN NORTH AMERICA
T143 Insights into Cordilleran Tectonics and Magmatism from the Sedimentary RecordTuesday, 12 October 20218:00 AM - 12:00 PMPortland Ballroom 255 (Hybrid Room)
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DATING FARALLON SHALLOW-ANGLE SUBDUCTION: CONSTRAINING THE AGE USING U-PB ZIRCON GEOCHRONOLOGY OF THE SCHIST OF SIERRA DE SALINAS
T66 The 100-Ma Event on the Western Margin of North AmericaMonday, 11 October 20218:00 AM - 12:00 PMA107–A109
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RAMAN THERMOMETRY REVEALS UNSUSPECTED TRANSPRESSIONAL VERTICAL UPLIFT IN THE NACIMIENTO BLOCK OF CENTRAL CALIFORNIA
T6 Feedbacks between Upper-Plate Deformation, Accretion and Alteration and Plate Boundary Processes in Subduction SystemsSunday, 10 October 20218:00 AM - 12:00 PMB111
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ZIRCON PETROCHRONOLOGY OF SALINIAN ARC MIDDLE CRUST, EASTERN SANTA LUCIA MOUNTAIN, CALIFORNIA
1 Chemical and Thermal Changes in Cordilleran Arc Systems: Insights from the Metamorphic RecordWednesday, 12 May 20218:30 AM - 12:30 PMUNR Dept of Geological Sciences & Engineering Room
2020
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A DEEP GLIMPSE INTO THE PENINSULAR RANGES BATHOLITH: ZIRCON GEOCHRONOLOGY AND HF ISOTOPIC INSIGHTS FROM GRANULITE XENOLITHS OF THE SAN QUINTIN VOLCANIC FIELD, BAJA CALIFORNIA
31 Petrology, Geochemistry, and Structure of Cordilleran Batholiths through Space and TimeThursday, 14 May 20201:30 PM - 5:30 PMPlaza Room
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ZIRCON PETROCHRONOLOGY OF SALINIAN ARC MIDDLE CRUST, EASTERN SANTA LUCIA MOUNTAIN, CALIFORNIA
24 Undergraduate Research (Posters)Wednesday, 13 May 20209:00 AM - 6:00 PMFountain Ballroom
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HISTORY OF EXHUMATION AND RELATED STRUCTURAL RELIEF GENERATION FOR THE SOUTHERNMOST SIERRA NEVADA BATHOLITH, AND TECTONIC FORCING INTERPRETATIONS
2 Exhumation and Uplift of the Sierra Nevada and Tehachapi MountainsTuesday, 12 May 20208:00 AM - 12:00 PMPlaza Room
2019
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FATE OF THE LOWER LITHOSPHERE DURING SHALLOW-ANGLE SUBDUCTION: THE LARAMIDE EXAMPLE
T129 Late Cretaceous to Early Paleogene Tectonic Development of the North American Cordillera (Posters)Monday, 23 September 20199:00 AM - 6:30 PMHall AB, North Building
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DETRITAL ZIRCON U-PB DATA REVEAL A MISSISSIPPIAN SEDIMENT DISPERSAL NETWORK ORIGINATING IN THE APPALACHIAN OROGEN, TRAVERSING NORTH AMERICA ALONG ITS SOUTHERN SHELF, AND REACHING AS FAR AS THE SOUTHWEST USA
T43 Laurentian Evolution during the Late Mississippian to Early Permian: Interactions and Feedbacks between Tectonism, Climate, and Sedimentary Systems (Posters)Sunday, 22 September 20199:00 AM - 5:30 PMHall AB, North Building
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IGNEOUS AND METAMORPHIC CHRONOLOGY OF SALINIAN ARC LOWER ARC CRUST, CENTRAL CALIFORNIA COAST
18 Tectonic Processes in Cordilleran ArcsThursday, 16 May 20198:00 AM - 12:00 PMRoom C125-126
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FATE OF CONTINENTAL LOWER CRUST AND UPPER MANTLE DURING SHALLOW-ANGLE SUBDUCTION: THE LARAMIDE EXAMPLE
7 Cordilleran Tectonics from the Basin and Range to Alaska and the Arctic: A Celebration of Elizabeth Miller’s Career (2018 GSA Structure and Tectonics Division Career Contribution Award) (Posters)Wednesday, 15 May 20199:00 AM - 6:00 PMExhibit Hall B
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U-PB DETRITAL ZIRCON GEOCHRONOLOGY OF PALEOZOIC CLASTICS OF THE OZARK PLATEAU: IMPLICATION FOR SEA-LEVEL FLUCTUATIONS AND FAR-FIELD TECTONICS
12 D4. Sedimentology and StratigraphyTuesday, 26 March 20198:00 AM - 12:00 PMKings Room
2018
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ROOTING AROUND BENEATH AN ARC: ZIRCON U-PB GEOCHRONOLOGIC AND HF ISOTOPIC CONSTRAINTS ON THE EVOLUTION OF THE BASE OF THE SIERRA NEVADA BATHOLITH
T41 Magmas Assemble! Petrologic, Geochemical, Chronologic, and Geophysical Insights into the Architecture and Timescales of Magmatic Systems (Posters)Sunday, 4 November 20189:00 AM - 5:30 PMHalls J-K
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GEOCHRONOLOGIC, THERMOBAROMETRIC, AND ISOTOPIC CONSTRAINTS ON THE ORIGIN OF THE SALINIAN BLOCK
72 D6. Structural Geology (Posters)Thursday, 17 May 20188:30 AM - 4:30 PMOutdoor Tents
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LATE CRETACEOUS–PALEOGENE TECTONIC AND PALEOGEOGRAPHIC EVOLUTION OF SOUTHERN CALIFORNIA BASED ON DETRITAL ZIRCON FROM THE FOREARC BASIN, PELONA-OROCOPIA-RAND SCHISTS, AND FRANCISCAN COMPLEX
54 Jurassic to Cenozoic Geology of Southern California, Southwest Arizona, and Sonora I: A Session Honoring Gordon Haxel and Carl JacobsonThursday, 17 May 20188:20 AM - 10:05 AMCanyon Room
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PRESSURE-TEMPERATURE EVOLUTION OF LOWER CRUSTAL-UPPER MANTLE XENOLITHS FROM THE COLORADO PLATEAU TRANSITION ZONE
31 Geologic and Structural Evolution of the Transition ZoneWednesday, 16 May 201810:20 AM - 12:20 PMHumphreys/Mt. Elden Room
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DETRITAL ZIRCON GEOCHRONOLOGY OF BLUESCHIST FACIES SEQUENCES IN THE ACCRETIONARY COMPLEX OF WEST-CENTRAL BAJA CALIFORNIA, MEXICO
34 Recent Advances in Understanding the Geology of Northwestern Mexico (Posters)Wednesday, 16 May 20188:30 AM - 6:30 PMOutdoor Tents
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ROOTING AROUND BENEATH AN ARC: ZIRCON U-PB GEOCHRONOLOGIC AND HF ISOTOPIC CONSTRAINTS ON THE EVOLUTION OF THE BASE OF THE SIERRA NEVADA BATHOLITH
39 Plate Margin Processes and Tectonics during the Cretaceous, Western North America (Posters)Wednesday, 16 May 20188:30 AM - 6:30 PMOutdoor Tents
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GEOLOGIC MAP AND STRUCTURAL GEOLOGY OF THE SUR–NACIMIENTO FAULT ZONE, MCWAY FALLS TO GAMBOA POINT, CENTRAL CALIFORNIA COAST
10 Jurassic to Cenozoic Geology of Southern California, Southwest Arizona, and Sonora: A Session Honoring Gordon Haxel and Carl Jacobson (Posters)Tuesday, 15 May 20188:30 AM - 6:30 PMOutdoor Tents
2017
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AGE CONSTRAINTS AND CORRELATION OF “SUR SERIES” METASEDIMENTARY FRAMEWORK ROCKS: IMPLICATIONS FOR THE ORIGIN OF THE SALINIAN TERRANE, CENTRAL CALIFORNIA
T389 New Perspectives on Cordilleran Tectonics, Paleogeography, and Metallogeny (Posters)Wednesday, 25 October 20179:00 AM - 6:30 PMHalls 4EF
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THE TECTONIC EVOLUTION OF THE CENTRAL ANDEAN PLATEAU AND GEODYNAMIC IMPLICATIONS FOR THE GROWTH OF PLATEAUS
T214 Challenges in Tectonics: Dynamic Interactions among Earth-Surface Processes, Landscape Evolution, and Tectonics ITuesday, 24 October 20178:00 AM - 12:00 PMTahoma 4
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THE PELONA–OROCOPIA–RAND AND RELATED SCHISTS OF SOUTHERN CALIFORNIA: A REVIEW OF THE BEST-KNOWN ARCHIVE OF SHALLOW-ANGLE SUBDUCTION ON THE PLANET
T140 The Dance of Arcs: Causes of Arc Migrations, Flare-Ups, and Magmatic Focusing IIMonday, 23 October 20171:30 PM - 5:30 PMSkagit 4
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TECTONIC TRAUMA AND HEALING OF SUB-CONTINENTAL MANTLE LITHOSPHERE BENEATH THE SW NORTH AMERICAN CORDILLERA: INSIGHTS FROM U-PB ZIRCON AND SM-ND GARNET AGES FROM COLORADO PLATEAU TRANSITION ZONE XENOLITHS
T57 Origin, Accretion, and Translation of Mesozoic-Cenozoic Terranes along the Pacific Margin of North AmericaSunday, 22 October 20171:30 PM - 5:30 PMTahoma 4
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NEW CONSTRAINTS ON MODELS FOR FOREARC SHORTENING ALONG THE SUR–NACIMIENTO FAULT, CENTRAL CALIFORNIA COAST
T57 Origin, Accretion, and Translation of Mesozoic-Cenozoic Terranes along the Pacific Margin of North AmericaSunday, 22 October 20171:30 PM - 5:30 PMTahoma 4
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NATIVE MESOZOIC SIERRA NEVADA ARC INDICATED BY DETRITAL ZIRCON GEOCHRONOLOGY OF PREBATHOLITHIC FRAMEWORK AND INTRA-ARC STRATA
T57 Origin, Accretion, and Translation of Mesozoic-Cenozoic Terranes along the Pacific Margin of North AmericaSunday, 22 October 20171:30 PM - 5:30 PMTahoma 4
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U-PB GEOCHRONOLOGY AND HF ISOTOPIC SYSTEMATICS OF METAMORPHIC AND DETRITAL ZIRCON DOMAINS IN THE SCHIST OF SIERRA DE SALINAS, CENTRAL CALIFORNIA COAST RANGES
29 Structural Geology and Tectonics of the Western United States (Posters)Wednesday, 24 May 20178:30 AM - 5:00 PMRoom 323A/B/C
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PRESERVATION OF A SUBDUCTION-RELATED GEOTHERMAL GRADIENT IN THE SCHIST OF SIERRA DE SALINAS, CENTRAL CALIFORNIA COAST RANGES
21 Structural Geology and Tectonics of the Western United StatesWednesday, 24 May 20178:30 AM - 11:50 AMRoom 325A
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DETRITAL ZIRCON GEOCHRONOLOGY OF THE CONDREY MOUNTAIN SCHIST (NORTHERN CALIFORNIA/SOUTHERN OREGON) REVEALS A ~30 MILLION YEAR RECORD OF SUBDUCTION-RELATED UNDERPLATING
29 Structural Geology and Tectonics of the Western United States (Posters)Wednesday, 24 May 20178:30 AM - 5:00 PMRoom 323A/B/C
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INVERTED METAMORPHISM OF THE CONDREY MOUNTAIN SCHIST (NORTHERN CALIFORNIA/SOUTHERN OREGON): A ~30 MYR RECORD OF SUBDUCTION INITIATION AND MATURATION BENEATH A COOLING UPPER PLATE
29 Structural Geology and Tectonics of the Western United States (Posters)Wednesday, 24 May 20178:30 AM - 5:00 PMRoom 323A/B/C
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INSIGHT ON THE ORIGIN OF THE SUR SERIES WITHIN THE SALINIAN TERRANE, CALIFORNIA EVALUATED THROUGH PETROGRAPHY, ZIRCON LA-ICPMS U-PB GEOCHRONOLOGY, AND HF ISOTOPES
29 Structural Geology and Tectonics of the Western United States (Posters)Wednesday, 24 May 20178:30 AM - 5:00 PMRoom 323A/B/C
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DETRITAL ZIRCON U-PB GEOCHRONOLOGY PROVIDES CONSTRAINTS ON THE DEPOSITIONAL AGE OF SUR SERIES METASEDIMENTS WITHIN THE SALINIAN TERRANE, CALIFORNIA
29 Structural Geology and Tectonics of the Western United States (Posters)Wednesday, 24 May 20178:30 AM - 5:00 PMRoom 323A/B/C
2016
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SEARCH FOR THE LOST ARC: A U-PB ZIRCON GEOCHRONOLOGIC AND ISOTOPIC STUDY OF THE LAS TABLAS UNIT, FRANCISCAN COMPLEX OF CENTRAL CALIFORNIA
T267 Plate Tectonics, Arc-Trench Systems, Cordilleran Tectonics, Sedimentary Basins, Sandstone Provenance, and Geoarchaeology (Posters): A Celebration of William R. Dickinson's CareerTuesday, 27 September 20169:00 AM - 6:30 PMExhibit Hall E/F
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LATE CRETACEOUS TECTONIC DISPLACEMENT OF SUB-CONTINENTAL MANTLE LITHOSPHERE BENEATH THE SW U.S. CORDILLERA: MANTLE XENOLITH CONSTRAINTS FROM THE COLORADO PLATEAU TRANSITION ZONE (CENTRAL ARIZONA)
T267 Plate Tectonics, Arc-Trench Systems, Cordilleran Tectonics, Sedimentary Basins, Sandstone Provenance, and Geoarchaeology (Posters): A Celebration of William R. Dickinson's CareerTuesday, 27 September 20169:00 AM - 6:30 PMExhibit Hall E/F
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DETRITAL ZIRCON EVIDENCE FOR LATE ORDOVICIAN UPLIFT, PALEOKARSTING, AND DRAINAGE REORGANIZATION IN THE OZARK DOME AND VICINITY, SOUTH-CENTRAL MISSOURI
T169 Detrital Zircons on the North American Continental Interior (Posters)Monday, 26 September 20169:00 AM - 6:30 PMExhibit Hall E/F
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DETRITAL ZIRCON GEOCHRONOLOGY OF THE WARRENSBURG-MOBERLY CHANNEL SANDSTONE, CENTRAL MISSOURI: A PALEORIVER THAT CONNECTED THE APPALACHIAN OROGEN TO GRAND CANYON AND ADJACENT DEPOCENTERS?
T52 Detrital Zircons on the North American Continental Interior ISunday, 25 September 20161:30 PM - 5:30 PMRoom 402
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EVALUATING DETRITAL ZIRCON PROVENANCE OF PRE-MESOZOIC STRATA IN THE SIERRA NEVADA, EASTERN CALIFORNIA
26 Structural Geology and Tectonics (Posters)Wednesday, 6 April 20168:30 AM - 12:30 PMBallroom C
2015
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ASSEMBLING THE WORLD’S TYPE SHALLOW SUBDUCTION COMPLEX: DETRITAL ZIRCON GEOCHRONOLOGIC CONSTRAINTS ON THE ORIGIN OF THE NACIMIENTO BLOCK, CENTRAL CALIFORNIA COAST RANGES
T149 Bridging Two Continents: Comparative Studies of Accretionary Orogenesis in the Central Asian Orogenic Belt, North American Cordillera, and Other Orogenic Belts IIMonday, 2 November 20151:30 PM - 5:30 PMRoom 349/350
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THE ORIGIN OF THE NACIMIENTO BLOCK: A GEO-/THERMOCHRONOLOGIC ANALYSIS
T149 Bridging Two Continents: Comparative Studies of Accretionary Orogenesis in the Central Asian Orogenic Belt, North American Cordillera, and Other Orogenic Belts IIMonday, 2 November 20151:30 PM - 5:30 PMRoom 349/350
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STRUCTURAL AND U-PB DETRITAL ZIRCON GEOCHRONOLOGIC CONSTRAINTS ON THE ORIGIN OF THE CONDREY MOUNTAIN SCHIST, CALIFORNIA - OREGON
T48 Bridging Two Continents (Posters): Comparative Studies of Accretionary Orogenesis in the Central Asian Orogenic Belt, North American Cordillera, and Other Orogenic BeltsSunday, 1 November 20159:00 AM - 5:30 PMExhibit Hall