2019 GSA Cordilleran Section

115th Annual Meeting

15–17 May 2019 | Portland, Oregon USA

Oregon Convention Center

TECHNICAL PROGRAM

THEME SESSIONS

In addition to the following Theme Sessions, we are soliciting abstracts for general discipline sessions.

T1. Cordilleran Tectonics from the Basin and Range to Alaska and the Arctic: A Celebration of Elizabeth Miller’s Career (2018 GSA Structural Geology and Tectonics Division Career Contribution Award).
Jeff Lee, Central Washington Univ.; Victoria Pease, Stockholm Univ.

Elizabeth Miller’s 40-year career at Stanford University resulted in significant contributions to characterizing extensional tectonics in the Basin and Range Province and in Alaska and the Arctic, including paleogeography and paleocontinental reconstructions of the Arctic. This session honors Elizabeth’s diverse career in structural geology and tectonics with contributions from the Basin and Range, Alaska, and the Arctic. (Both oral & poster.)

T2. Advances in Seismic Hazard Assessment through Paleoseismic and Tectonic Geomorphic Fault Studies: In Honor of Ray J. Weldon II, for His Career and Contributions to the Field.
Ashley Streig, Portland State Univ.; Kate Scharer and Scott Bennett, USGS.

Tectonic geomorphic and paleoseismic studies provide important insight into active fault behavior. Observations include timing and displacement of past earthquakes, slip rates and fault kinematics from offset landforms, and distribution of surface deformation. This session seeks contributions on active fault studies, hazard characterization of individual faults, and along-strike rupture correlations. (Both oral & poster.)

T3. A Simple Twist of Plate: In Honor of the Career Contributions of the Dynamic Duo—Rick Blakely and Ray Wells—to Understanding Plate Interactions and Deformation in Cascadia.
Andrew Meigs; Oregon State Univ.; Scott Bennett and Peter Haeussler, USGS.

This session honors the contributions of Ray Wells and Rick Blakely toward understanding the tectonic evolution of the Pacific Northwest. Talks are encouraged to showcase the breadth and impact of their work integrating geological and geophysical approaches to characterize the structural, tectonic, neotectonic, and magmatic history of Cascadia. (Oral; posters possible.)

T4. Recent Advances in Cordilleran Tectonic Evolution—1: Paleozoic to Mesozoic.
Jamie MacDonald, Florida Gulf Coast Univ.; Joe Dragovich, Associated Earth Sciences Inc.; Megan Anderson, Washington Dept. of Natural Resources; Peter Davis, Pacific Lutheran Univ.; Jeffrey Tepper, Univ. of Puget Sound.

The Paleozoic to Mesozoic Cordillera grew from the formation and accretion of many diverse terranes. The continental margin of the North American plate also recorded this accretionary orogeny. Multidisciplinary submissions about the tectonic development of the North American Cordillera during the Paleozoic or Mesozoic are particularly welcome. (Both oral & poster.)

T5. Recent Advances in Cordilleran Tectonic Evolution—2: Cenozoic.
Jamie MacDonald, Florida Gulf Coast Univ.; Joe Dragovich, Associated Earth Sciences Inc.; Megan Anderson, Washington Dept. of Natural Resources; Peter Davis, Pacific Lutheran Univ.; Jeffrey Tepper, Univ. of Puget Sound.

During the Cenozoic the North American Cordillera transitioned from accretion to Andean-type subduction, providing an excellent opportunity to investigate how changes in subduction parameters (e.g., rate, slab age, terrane accretion, sedimentation) are recorded in the overlying plate. Submissions on this subject from multiple disciplines are welcome. (Both oral & poster.)

T6. Tectonic Development of the Coast Mountains, British Columbia and Alaska.
Margi Rusmore, Occidental College; M. Robinson Cecil, CSU–Northridge; George Gehrels, Univ. of Arizona; Harold Stowell, Univ. of Alabama.

The Coast Mountains are the site of one of the largest and longest-lived Cordilleran arc systems and record a complex history of batholith growth, terrane amalgamation and translation, metamorphism, exhumation, and landscape evolution. We invite contributions from a broad range of disciplines, including (but not limited to) petrology, structural geology, geophysics, sedimentology, and geomorphology. (Oral; posters possible.)

T7. Constraints on Insular Superterrane Collision and Translation: Current Thinking on the Baja-BC Hypothesis.
Basil Tikoff, Univ. of Wisconsin; Darrel S. Cowan, Univ. Washington; Paul Umhoefer, Northern Arizona Univ.

Paleomagnetic data from the Insular superterrane (Baja-BC) indicate significant northward movement since ca. 100 Ma, and detrital zircon studies are now used to evaluate this hypothesis. We invite contributions on any form of tectonic analysis that constrains collision and/or coastward translation of the Insular superterrane and associated outboard or inboard terranes. (Oral.)

T8. Paleogene Tectonic Setting of the Greater Pacific NW before Cascadia: From Sileztia to the Challis Belt.
Paul Umhoefer, Northern Arizona Univ.; Robert Miller, San José State Univ.; Jeff Tepper, Univ. of Puget Sound.

The greater Pacific Northwest from the coast to SE British Columbia, Idaho, and Montana had a complex tectonic history before the Cascadia arc formed about 40 Ma. We seek contributions on the early Cenozoic geologic history of that region that bear on the plate tectonic setting from 60 to 40 Ma. (Oral.)

T9. Tectonic Processes in Cordilleran Arcs.
Stacia Gordon, Univ. of Nevada–Reno; Robert Miller, San José State Univ.

Cordilleran arcs preserve a record of interactions among different rheological layers of the Earth, from the surface to the mantle, as well as the tectonic history of the western continental margin. We invite contributions from a wide range of topics related to arcs investigated through a variety of geoscience techniques (tectonics, structure, geophysics, geochemistry). (Oral.)

T10. Crystal Windows into Igneous Processes.
Anne Fulton and Michelle Muth, Univ. of Oregon; Nicole Rocco, Oregon State Univ.

Variations on the crystal scale are intimately linked to large-scale dynamics in igneous systems. We invite contributions that explore the implications of mineral zoning, mineral textures, melt inclusions, reentrants/embayments, etc., for magma generation and evolution in the U.S. Cordillera and beyond. (Oral and/or poster.)

T11. Advances in the Formation, Storage, Eruption, and Emplacement of Evolved Magma Bodies.
Madison Myers, Montana State Univ.; Laura Waters, Sonoma State Univ.; Jim Watkins and Nathan Andersen, Univ. of Oregon; John Wolff, Washington State Univ.

Our understanding of how evolved magmas are formed, stored, and erupted, as well as the timescales over which these processes occur, has greatly evolved over the past few decades. This session invites field geologists, geophysicists, numerical and diffusion modelers, experimentalists, petrologists, and volcanologists to discuss how our perspective of these more evolved systems has shifted, and what uncertainties remain. (Oral.)

T12. Field, Petrological, and Geochemical Constraints on Magmatic Systems in the Cordillera.
Wendy Bohrson, Central Washington Univ.; Anita Grunder, Oregon State Univ.

The Cordillera is home to volcanic and plutonic systems large and small that display splendid variety in composition, solidification history, and timescale. This session invites presentations on the origin and evolution of large and/or small volume magmatic centers, including field, analytical, and computational approaches. Integrated studies are particularly welcome. (Both oral & poster.)

T13. The Yellowstone Hotspot Province: Prehistory, Timing, Extent, Volcanic Products, and Hydrothermal Consequences.
Arron Steiner and John Wolff, Washington State Univ.; Martin Streck, Portland State Univ.

This session will focus on volcanism of the Yellowstone hotspot, including Miocene–Quaternary units of the Columbia River Basalts, Snake River Plain, High Lava Plains, and northern Nevada. Included topics: timing and extent; Oligocene and earlier precursor magmatism; magma dynamics and crustal melts; consequences of associated hydrothermal activity; and crustal modification. (Both oral & poster.)

T14. Magmatism of the Columbia River Flood Basalt Province.
Seth Burgess and Michael Sawlan, USGS.

This session focuses on the evolution of the Columbia River flood basalt province as viewed from diverse perspectives, including (but not limited to) geochemistry, geochronology, stratigraphy, volcanology, and geophysics. (Oral.)

T15. Magmatism in the Cascades: Variations in Space and Time.
Adam Kent, John Dilles, and Anita Grunder, Oregon State Univ.

Although the Cascades are one of Earth’s most studied subduction zones, considerable uncertainty exists about how tectonic, igneous, and other processes vary through space and time. We welcome contributions on ancestral to modern Cascade arc magmatism, including geochemical and geophysical segmentation and evolution, hydrothermal processes, and ore deposit formation. (Oral; posters possible.)

T16. Landscape Evolution and Tectonic Geomorphology in the Greater Pacific Northwest.
Matthew Morriss, Univ. of Oregon; Philip Schoettle-Greenee, Univ. of Washington; Will Struble, Univ. of Oregon; Lydia Staisch, USGS.

This session will focus on geomorphology and tectonics near or within the Pacific Northwest. We are seeking presentations on innovative research with implications for landscape evolution over the Neogene timescale. Studies with attention to unraveling long-lived tectonic and surface processes in this geologically diverse region are encouraged. (Both oral & poster.)

T17. Landscape Changes at Various Temporal and Spatial Scales.
Allen Gontz and Josh Kelly, San Diego State Univ.

Landscape change studies are used to relate changes to climate and societal activities. Studies of any aspect of the landscape or climate, investigated at any spatial or temporal scale, are welcome. Of specific interest are studies that integrate techniques and showcase the relationship of climate change and landscape response. (Both oral & poster.)

T18. Interactions between Water and Volcanic Terranes.
Erick Burns, USGS; Gordon Grant, U.S. Forest Service; Steven Ingebritsen, USGS.

Volcanism and derivative geologic features are prevalent and frequently dominant across much of the North American Cordillera. Volcanogenic deposits exert strong controls on processes such as regional hydrology, and are associated with unique flow patterns and water chemistry. Abstracts are solicited on any aspect of volcanic hydrology or related sciences (e.g., ecology), with preference given to presentations that examine causative relations between volcanic features and system response. (Both oral & poster.)

T19. The Evolution of the Columbia River: Fluvial, Volcanic, and Tectonic Interactions from Miocene to Modern Time.
Lydia Staisch and Jim O’Connor, USGS.

This session focuses on the mechanisms and processes that have shaped the Columbia River over short (decadal) to geologic timescales. We welcome submissions with new approaches and applications of geochronology, geochemistry, landscape evolution modeling, and chemical/physical mass balance. (Both oral & poster.)

T20. Glaciers of the North American West.
Andrew G. Fountain, Portland State Univ.; Claire Todd, Pacific Lutheran Univ.; Erin Whorton, USGS.

Glaciers shape mountain landscapes; alter the temperature, timing, and volume of water runoff; and present geologic hazards. The goal of this session is to summarize the current state of understanding of glacier variability in the North American West including climate drivers and effects on the landscape and on downstream communities. (Oral; posters possible.)

T21. Understanding Sediment Transport Dynamics in Mountain Environments.
Scott W. Anderson and Kristen Jaeger, USGS.

Steep upland basins tend to be the major sediment suppliers to lower-elevation settings via landslides, debris flows, and river sediment transport, and can be strongly influenced by natural and anthropogenic disturbances. We welcome contributions that aim to better understand the rates, processes, and history of sediment delivery and transport in these steep settings. (Oral; posters possible.)

T22. New Insights in River Processes and Implications for Floodplain Management and Restoration.
Mackenzie Keith and Laurel Stratton, USGS.

River processes vary as a function of geology, climate, and vegetation, resulting in diverse hydrogeomorphic regimes that support differing habitats with implications for floodplain management and restoration. This session welcomes contributions that further the understanding of hydrogeomorphic and vegetation processes along rivers and floodplains, highlighting applications to management and restoration. (Both oral & poster.)

T23. Landslides: Hazards and Agents of Landscape Evolution.
Adam Booth, Portland State Univ.; Susan Shaw, Weyerhaeuser Co.; Dan Shugar, Univ. of Washington–Tacoma; Scott Burns, Portland State Univ.

This session seeks contributions related to landslides at local to global scales. Studies that improve assessments of landslide hazard and risk, advance our understanding of landslide mechanics, demonstrate effective mitigation, and explore how landslides interact with other surface processes to shape landscapes are especially encouraged. (Both oral & poster.)

T24. Geologic Maps: Essential Framework Tools Used to Solve Practical Earth Science Problems (Posters).
Jason McClaughry and Carlie Duda, Oregon DOGAMI.

Geologic maps are essential tools, required to solve practical problems including deciphering Earth history and processes, evaluating resources, and preparing for hazards. Technological advances continue to improve the accuracy and usability of geologic maps. We invite posters presenting new geologic mapping, as well as new approaches, new insights, and innovative uses of geologic mapping. (Poster.)

T25. Geologic Hazards: Hazard Maps, Risk Analysis, and Risk Reduction.
William Burns, Nancy Calhoun, and Christina Appleby, Oregon DOGAMI.

Geologic hazards represent a major proportion of hazards in the Cordillera and in America. Understanding the hazard is fundamental, but understanding the hazard and risk can help advance risk reduction actions. This session intends to facilitate sharing new techniques in hazard and risk analysis, which have stimulated risk reduction. (Oral.)

T26. Groundwater Resources of Oregon: Celebrating the Scientific Curiosity of Ken Lite and Marshall Gannett.
Esther Pischel, USGS; Amanda Garcia, USGS; Walter Burt, GSI Water Solutions, Inc.

Ken Lite and Marshall Gannett have been leaders in advancing the quantitative understanding of the geohydrology of the Northwest, developing new insights into the relation between groundwater flow, the structural and depositional histories of volcanic basins, and the connections to biological and human systems. We welcome contributions on these topics to celebrate their careers and legacy. (Both oral & poster.)

T27. Hydrogeology of Coastal Basins of the Western United States.
Donald Sweetkind, Geoffrey Cromwell, USGS.

Coastal basins in the western United States vary greatly in their geologic setting, water availability, and predominant land and water uses. This session welcomes contributions on the tectonic evolution, geologic framework, hydrogeologic conceptualization, and water-resource evaluation of coastal basins. Scientists from geologic, hydrologic, and geophysical disciplines are all encouraged to apply. (Oral; posters possible.)

T28. Lakes across the West: Archives of Climate Change and Storehouse of Economic Resources.
Scott W. Starratt, USGS.

This session celebrates lacustrine research across western North America. Lakes are important freshwater reservoirs and their sediments are archives of climate change, pollution, seismic activity, and ecological succession, as well as sources of significant energy and mineral reserves. (Both oral & poster.)

T29. Hydrogeology of Springs in the Great Basin.
Hank Johnson, Steve Gingerich, Nick Corson-Dosch, USGS.

Springs in the Great Basin are important resources for wildlife, livestock, and humans and are hot-spots of biodiversity. Management and conservation of these systems requires an understanding of their hydrogeology and temporal dynamics. This session seeks contributions that explore geologic controls on spring distribution, discharge variability, geochemistry, recharge areas/flowpaths, and other relevant topics. (Oral; posters possible.)

T30. Undergraduate Research (Posters).
Jeff Marshall, Cal Poly Pomona.

This poster session will highlight geosciences research conducted by undergraduate students. All abstracts must be written by students, but may include non-student co-authors (faculty mentors or collaborators); students must present the posters. Topics may include undergraduate research in any discipline of geology or related fields (e.g., water resources, environmental science, physical geography, oceanography, etc.). (Poster.)

T31. Hands-On Teaching Demonstrations in Introductory Geoscience Courses: Audience Participation Requested!
Daina Hardisty, Mt. Hood Community College; Andrew Hillt and Eriks Puris, Portland Community College.

This is a geoscience education session that practices what it preaches. Authors will present micro-demonstrations of effective teaching activities that illustrate geologic concepts in introductory geoscience courses. Presentations include audience participation, assessment results, and reflections on effectiveness. (Oral.)

T32. Where the Next Generation Science Standards Meet Place-Based and Outdoor Learning.
Nancy Price, Portland State Univ.

Outdoor and place-based learning are important components in and beyond the Pacific Northwest. The Next-Generation Science Standards (NGSS) have added the new concepts of Practices, Crosscutting Concepts, and Three-Dimensional Learning to this education landscape. This session will cover the intersection of NGSS with outdoor/place-based education, such as models of 3-D learning, successes and challenges incorporating NGSS into existing programs, and research on student learning. (Oral and/or poster.)

T33. Geoscience Education Research and Practice.
Robyn Mieko Dahl, Western Washington Univ.; Natalie Bursztyn, Quest Univ.; Katrien van der Hoeven Kraft, Whatcom Community College.

This session will explore all aspects of geoscience education, with evidence of effectiveness, from research to practice. This includes (1) research on teaching and learning, assessment, and educational research; (2) implementation of the NGSS in K–12 and educating future teachers; and (3) formal and informal teaching and outreach to all audiences (K–16 and beyond). (Oral; posters possible.)

T34. Keep the Anthropocene Weird: Where Have We Come From, What Are We Doing, and How Will We Proceed?
Sammy Castonguay, Treasure Valley Community College.

The discussion around the informally recognized “Anthropocene” has encouraged a plethora of interdisciplinary conversations regarding our species and its relationship with the rest of the earth systems, ranging from post-apocalyptic religious dystopia to sci-fi techno-utopia. This session seeks proposals illuminating the diversity of thought relating to the Anthropocene. (Both oral & poster.)