For additional information, please contact the field trip co-chairs: Franciszek Hasiuk, and Aaron Wood.
Twenty-First Century Aggregates Field Trip.
Franciszek Hasiuk, Iowa State University, franekiastate.edu; Ryan Clark, Iowa Geological Survey, ryan-j-clarkuiowa.edu.
Associated with Theme Session 38.
The mining of geologic materials for use in the construction of roads and structures provides a vital service that affects all of society. Theme session 38 solicits case studies of cutting-edge science applied to the exploration, development, production, and reclamation of aggregate resources and sites. An afternoon field trip will visit local producers to highlight current trends in aggregate resources and discuss the future geological needs of the industry.
Cambrian-Ordovician Industrial Sand Resources and Stratigraphy of Iowa, Wisconsin, and Minnesota, USA.
Jay Zambito, Wisconsin Geological Survey, jay.zambitouwex.edu; Bob Libra, blibra999gmail.com; Tony Runkel, Minnesota Geological Survey, runke001umn.edu.
Two-day field trip from Ames, Iowa, up the Mississippi River Valley to Eau Claire, Wisconsin, and returning to Ames. The purpose is to showcase different mining techniques (underground vs. surface) and the stratigraphy of Cambrian and Ordovician sandstone. Potential stops include: Pattison Sand underground mine (Iowa); Lower Wisconsin River and Mississippi River classic outcrops and type sections (Wisconsin and Minnesota); drill core (Wisconsin); surface sand mine (Wisconsin); units that will be seen include the Ordovician St. Peter Formation and the Cambrian Mount Simon, Eau Claire, Wonewoc, Lone Rock, and Jordan Formations.
Geologic Controls on Surface and Groundwater Quality in the Cambrian-Ordovician Aquifer System of the “Driftless” Area of Southeastern Minnesota.
Cosponsored by GSA Hydrogeology Division; GSA Karst Division; GSA Environmental and Engineering Geology Division.
Robert Tipping, Minnesota Geological Survey, tippi001umn.edu; Tony Runkel, Minnesota Geological Survey, runke001umn.edu; Julia Steenberg, Minnesota Geological Survey, and01006umn.edu; Andrew Retzler, Minnesota Geological Survey, aretzlerumn.edu.
A two-day field trip in the “driftless” area of southeastern Minnesota that targets groundwater–surface water interaction, and in particular the hydrostratigraphic and other geologic controls on contaminant transport in the Cambrian-Ordovician aquifer system. Particular focus on linking variability in water quality data sets (e.g., nitrate and pesticide concentrations) to variable geologic and hydrostratigraphic settings.
Geology of the Upper Mississippi Valley Pb-Zn District.
Martin Appold, University of Missouri, appoldmmissouri.edu.
Visit classic exposures of the Upper Mississippi Valley Lead-Zinc district to discuss current models for fluid flow and diagenesis that give rise to one of the iconic ore deposits of the Upper Midwest USA.
Geomorphic Evolution of the Upper Mississippi Valley.
Cosponsored by GSA Quaternary Geology and Geomorphology Division.
Andrew Wickert, University of Minnesota–Twin Cities, awickertumn.edu; Carrie Jennings, Freshwater Society, cjenningsfreshwater.org; Karen Gran, University of Minnesota–Duluth, kgrand.umn.edu; Brandon Curry, Illinois State Geological Survey, b-curryillinois.edu.
Ice streams, drainage rerouting, and meltwater pulses shaped the landscape of the Upper Mississippi Valley and Des Moines Lobe region, whose woods and fields were once polar tundra. We will visit ancient river courses, Pleistocene aeolian features, glacial-stage river terraces, and the ancient bed of the Laurentide Ice Sheet.
Geosciences at the Science Center of Iowa.
Cosponsored by GSA Geoscience Education Division.
Renee Harmon, Science Center of Iowa, renee.harmonsciowa.org.
Field trip to the Science Center of Iowa to learn more about their “Portal to the Public” program.
Geoscience in Your Backyard: A Field Trip for Educators.
Cosponsored by GSA Geoscience Education Division.
Collin Reichert, Ames Community Schools, collin.reichertames.k12.ia.us.
The realities of K–12 education systems can make outdoor learning experiences a rarity. Given the realities of schooling, how might one provide the critical encounters with the natural world students need in order to more effectively learn science, enrich their lives, and become more connected with their sense of place?
Hydrogeology of the Ames Aquifer and Its Award-Winning Drinking Water.
Cosponsored by GSA Hydrogeology Division; GSA Geology and Society Division.
William Simpkins, Iowa State University, bsimpiastate.edu; Lyle Hammes, Ames Water and Pollution Control Department, lhammescityofames.org.
Ames, Iowa, USA, is blessed with award-winning drinking water from the Ames aquifer. We will review the hydrogeology and development history of the aquifer; visit key 1976–1977 drought sites including Ada Hayden Lake; present recent research addressing aquifer vulnerability and sustainability; and tour the new US$60M water-treatment plant.
Pennsylvanian Sandstones and Cyclothems of Central Iowa.
Cosponsored by GSA Sedimentary Geology Division.
Philip Heckel, University of Iowa, philip-heckeluiowa.edu; Emily Finzel, University of Iowa, emily-finzeluiowa.edu; John Paul Pope, Northwest Missouri State University, jppopenwmissouri.edu.
One-day field trip visiting classic Pennsylvanian outcrops of central Iowa. Trip begins with the eponymous sandstone outcrops of Ledges State Park west of Ames, and progresses southward to cyclothem outcrops in counties around Winterset.
Pipes, Pigs, and Peaks: Human and Animal Impacts on Hydrology, Water Quality, and Soils in Central Iowa.
Cosponsored by GSA Hydrogeology Division; GSA Geology and Society Division; GSA Soils and Soil Processes Interdisciplinary Interest Group.
William Simpkins, Iowa State University, bsimpiastate.edu; Lee Burras, Iowa State University, lburrasiastate.edu; Kristie Franz, Iowa State University, kfranziastate.edu.
Humans have dramatically altered the hydrology and soils in the Midwest. We will examine some of the more significant impacts in central Iowa, including the Dakota Access Pipeline, drainage of Lake Cairo, drainage tile installation, swine CAFO waste management, and impacts on flooding and streamflow.