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22–25 SEPTEMBER  PHOENIX, ARIZONA, USA

18. Dust on a Dangerous Highway: Exploring Linkages 26. Exploring Superimposed Laramide Contraction,
between Landscape and Dust Emissions along Interstate-10 Porphyry Copper Systems, and Cenozoic Extension in
near Casa Grande, Arizona. Sat., 21 Sept. US$112. Cosponsor: the Globe-Superior-Ray–San Manuel Area, East-Central
GSA Quaternary Geology and Geomorphology Division. Leaders: Arizona. Thurs.–Sat., 26–28 Sept. US$595. Cosponsor:
Mark R. Sweeney, University of South Dakota; Eric V. McDonald, GSA Mineralogy, Geochemistry, Petrology, and Volcanology
Desert Research Institute. Division; GSA Structural Geology and Tectonics Division.
Leaders: Mark D. Barton, University of Arizona; Eric
19. Accessible Field Geology of Petrified Forest National Park. Seedorff, University of Arizona; Daniel Favorito; Roy Greig;
Wed.–Thurs., 25–26 Sept. Apply at https://theiagd.org/gsa-2019/. Carson A. Richardson.
Cosponsors: The International Association for Geoscience
Diversity; GSA Geoscience Education Division; GSA Diversity in 27. The “Holey” Tour: Ron Greeley’s Introductory
the Geosciences Committee. Leaders: Christopher L. Atchison, Planetary Geology Field Trip. Thurs.–Sat., 26–28 Sept.
University of Cincinnati; William G. Parker; Nancy Riggs; Steven US$475. Cosponsors: GSA Planetary Geology Division;
Semken; Steven Whitmeyer. Arizona State University School of Earth and Space
Exploration. Leaders: David A. Williams, Arizona State
20. Catalina-Rincon Metamorphic Core Complex, Tucson, University; Steven D. Kadel; R. Scott Harris.
Arizona. Wed.–Fri., 25–27 Sept. US$385. Leaders: George H.
Davis, University of Arizona; George E. Gehrels; Jon Spencer. 28. Mesozoic to Cenozoic Sedimentation, Tectonics, and
Metallogeny of Sonora, Mexico. Thurs.–Mon., 26–30 Sept.
21. A River is Born: Highlights of the Geologic Evolution US$850. Leaders: Jason B. Price, California Institute of
of the Colorado River Extensional Corridor and its River: Technology; Thierry Calmus, Lucas Ochoa-Landin, Scott Bennett.
A Field Trip Honoring the Life and Legacy of Warren
Hamilton. Wed.–Sat., 25–28 Sept. US$488. Cosponsors: 29. Volcanic and Marine Stratigraphy along the El Alamo
GSA Quaternary Geology and Geomorphology Division; Canyon, Santa Rosalia Basin, Baja California. Thurs.–Wed.,
GSA Structural Geology and Tectonics Division. Leaders: 26 Sept.–2 Oct. US$1,250. Cosponsor: Geophysics Institute,
Keith A. Howard, U.S. Geological Survey; P. Kyle House; UNAM, Campi Morelia. Leader: José Luis Macías, National
Philip A. Pearthree; Barbara E. John; Ryan S. Crow. Autonomous University of Mexico (UNAM).

22. Sonoran Desert Landforms via Mountain Biking. 30. Walk in the Footsteps of the Apollo Astronauts. Fri.–Sat.,
Thurs., 26 Sept. US$250. Leaders: Ronald Dorn, Arizona State 27–28 Sept. US$265. Cosponsors: USGS; Flagstaff Festival of
University; Ian Walker, Arizona State University; Steve Science; Flagstaff Lunar Legacy; Lowell Observatory. Leaders:
Skotnick, Hydrosystems Inc. R. Greg Vaughan, Astrogeology Science Center; Kevin Schindler;
Jeanne Stevens; Ian Hough.
23. The 2010 Schultz Fire—Immediate, Ongoing, and Long-
Term Geomorphic, Ecological, and Societal Impacts of a 32. A Comparison of Two Caves in Southern Arizona:
Small, High-Severity Wildfire. Thurs.–Fri., 26–27 Sept. Colossal Cave and Kartchner Caverns. Thurs., 26 Sept.
US$248. Cosponsors: Grant Meyer; GSA Quaternary Geology US$90. Cosponsors: Kartchner Caverns State Park; Colossal
and Geomorphology Division; Stephen Slaughter; GSA Cave Mountain Park. Leaders: Sarah Truebe, University of
Environmental and Engineering Geology Division. Leaders: Arizona; Lauren Hohl.
Ann M. Youberg, University of Arizona; Luke McGuire.
24. Geology and Paleontology of the Mid-Pleistocene El
Golfo Badlands, Sonora, Mexico. Thurs.–Fri., 26–27 Sept.
US$340. Leaders: Fred W. Croxen, Arizona Western College;
Christopher A. Shaw.

25. The Rise and Fall of a Laramide Deposystem: Structural “I especially enjoyed the wide selection
Inversion and Regional Drainage Reversal across the Plateau of field trips and the ancient Earth
Transition Zone in Eastern Arizona. Thurs.–Fri., 26–27 Sept.
US$370. Leader: Andre R. Potochnik, Grand Canyon and planetary sessions.”
Conservancy. —Feedback from GSA 2018 Indy

www.geosociety.org/AnnualMeeting 23