EP015
Landscape Evolution Beneath and Beyond the Ice
Session ID#: 159920
Session Description:
In the recent geological past, glaciers covered a substantial fraction of the global land surface. These ice masses carved bedrock and exported sediment into moraines, ice-marginal lakes, and rivers. Through erosion and deposition, they converted once-through-flowing drainages into sets of closed depressions. Glacial erosion produced sediment, which when carried by meltwater discharge from the ice margins, modified river valleys and generated fluvial terraces that are still seen today. The finer fractions of these sediments, combined with oft cold, dry, and windy conditions, were lofted by winds and eventually deposited into dunes and fields of loess. Evidence of cryoturbation surrounds the sites of past ice sheets, including frost-wedge polygons, sand and ice wedges, and evidence of solifluction and frost-induced erosion.
In this session, we invite presentations on how landscapes once (or currently) beneath and/or near glaciers have been shaped by the presence of the ice and its environment. For the first AGU Fall Meeting in Chicago, once covered by an outlet glacier of the Laurentide Ice Sheet, we seek to celebrate and delve into the formation mechanisms of such glacial landscapes and the histories recorded in the landforms of today.
Co-Organized:
Co-Sponsor(s):
Index Terms:
0710 Periglacial processes [CRYOSPHERE]
0790 Weathering [CRYOSPHERE]
1815 Erosion [HYDROLOGY]
1861 Sedimentation [HYDROLOGY]
Primary Convener: Andrew D Wickert, University of Minnesota Twin Cities, Department of Earth & Environmental Sciences, Minneapolis, MN, United States; University of Minnesota Twin Cities, Saint Anthony Falls Laboratory, Minneapolis, MN, United States
Conveners: Lucas Zoet, University of Wisconsin-Madison, Department of Geoscience, Madison, WI, United States, Phil Larson, Minnesota State University Mankato, EARTH Systems Laboratory and Department of Geography, Mankato, MN, United States and Shanti Bhattacharya Penprase, University of Minnesota Twin Cities, Department of Earth & Environmental Sciences and Saint Anthony Falls Laboratory, Minneapolis, United States
Student/Early Career Convener: Shanti Bhattacharya Penprase, University of Minnesota Twin Cities, Department of Earth & Environmental Sciences and Saint Anthony Falls Laboratory, Minneapolis, United States
Subglacial landforms from variations in modeled sediment flux (Invited) (1058688)
Anders Damsgaard, Aarhus University, Aarhus C, Denmark, Dougal Hansen, University of Wisconsin-Madison, Department of Geoscience, Madison, WI, United States and Lucas Zoet, University of Wisconsin-Madison, Madison, United States
Linking subglacial abrasion rates to rock frictional energy during slip (1059434)
Dougal Hansen, University of Wisconsin Madison, Madison, WI, United States, Jeremy Brooks, Northwestern University, Earth and Planetary Sciences, Evanston, IL, United States; University of Wisconsin-Madison, Department of Geoscience, Madison, United States, Nathan Stevens, University of Wisconsin-Madison, Geoscience, Madison, United States and Lucas Zoet, University of Wisconsin-Madison, Department of Geoscience, Madison, WI, United States
Inferring Sediment Transport and Subglacial Hydrology from Esker Deposits of the Chippewa Lobe of the Laurentide Ice Sheet (1064757)
Francisca Nunez Ferreira, University of Wisconsin Madison, Madison, WI, United States, Lucas Zoet, University of Wisconsin-Madison, Department of Geoscience, Madison, WI, United States, J Elmo Rawling III, University of Wisconsin-Madison, Wisconsin Geological and Natural History Survey, Madison, WI, United States and Dave J. Ullman, Northland College, Ashland, WI, United States
Landscape Evolution under the Southern Laurentide Ice Sheet (1074700)
Shawn Naylor1, Andrew D Wickert2, Douglas A Edmonds3 and Brian J Yanites3, (1)Indiana University Bloomington, Center for Geospatial Data Analysis, Indiana Geological and Water Survey, Bloomington, IN, United States, (2)University of Minnesota Twin Cities, Department of Earth & Environmental Sciences and Saint Anthony Falls Laboratory, Minneapolis, United States, (3)Indiana University Bloomington, Department of Earth and Atmospheric Sciences, Bloomington, United States
Geometric Factors Influencing Fracture Growth in Subglacial Quarrying (1101234)
Christopher Roland Theiss, University of California Berkeley, Berkeley, CA, United States, Kurt M Cuffey, University of California Berkeley, Department of Geography, Berkeley, CA, United States and Qi Zhao, The Hong Kong Polytechnic University, Department of Civil and Environmental Engineering, Kowloon, Hong Kong; University of California Berkeley, Berkeley, United States
Quantifying Density and Orientation of Recently Exposed Fractures Across Glacial Valley Profiles, Adamello Massif, Italy, and Jostedalsbreen, Norway (1121643)
Samuel Marcus, Wesleyan University, Middletown, CT, United States, Phillip G Resor, Wesleyan Univ, Middletown, CT, United States, Colby Francis Rand, University of Maine, Orono, ME, United States and Seth W Campbell, University of Maine, Earth and Climate Sciences and Climate Change Institute, Orono, United States
Ice-dammed Lake Recorded by Basaltic Lava Deltas above Sandvatn, a Lake in Iceland (1125839)
Audrey R Putnam1, Kirsten Siebach1, Candice Ceilidh Bedford2, Sarah Simpson3, Michael Thorpe4 and the DIGMARS Team, (1)Rice University, Earth, Environmental, and Planetary Sciences, Houston, United States, (2)Lunar and Planetary Institute, Houston, TX, United States, (3)NASA Johnson Space Center, Houston, United States, (4)NASA Johnson Space Center, Houston, TX, United States
Numeric Simulations of Glacial Quarrying (1132380)
Lucas Zoet, University of Wisconsin-Madison, Department of Geoscience, Madison, United States, William Bertrand, University of Colorado at Boulder, Boulder, United States; University of Wisconsin Madison, Geoscience, Madison, United States and Jacob Woodard, University of Wisconsin-Madison, Geoscience, Madison, WI, United States
Impacts of Changing Climate and Glacially Driven Base Level on an Upper Mississippi River Tributary During the Most Recent Glacial–post-Glacial Transition (1132782)
Shanti Bhattacharya Penprase1, Andrew D Wickert1, Phil Larson2, Douglas J Faulkner3, Eric Alexander Barefoot4, Jimmy Wood1, Jabari Jones5, Campbell N Dunn6, Isaac J Larsen7, Tammy M Rittenour8 and Garry L Running3, (1)University of Minnesota Twin Cities, Department of Earth & Environmental Sciences and Saint Anthony Falls Laboratory, Minneapolis, United States, (2)Minnesota State University Mankato, EARTH Systems Laboratory and Department of Geography, Mankato, MN, United States, (3)University of Wisconsin Eau Claire, Department of Geography & Anthropology, Eau Claire, United States, (4)University of Minnesota Twin Cities, Minneapolis, United States, (5)University of Minnesota Twin Cities, Earth and Environmental Sciences, Minneapolis, United States, (6)University of Wisconsin Madison, Department of Mathematics, Madison, United States, (7)University of Massachusetts Amherst, Department of Geosciences, Amherst, United States, (8)Utah State University, Department of Geosciences, Logan, UT, United States
A Novel Approach to Quantify Bedrock Fracture Density in Glaciated Environments and Improve Glacial Erosion Models Using Drone Imagery (1136209)
Colby Francis Rand, Western Washington University, Environmental Sciences, Bellingham, United States, Maxwell Burtis, University of Maine, Mechanical Engineering, Brunswick, United States, Grace Fitzgerald-Diaz, Columbia University, New York, United States, Holly Harris, Bowdoin College, Brunswick, United States, Samuel Marcus, Wesleyan University, Middletown, CT, United States, Hayden Stotts, University of Oregon, Eugene, OR, United States, Tahi Wiggins, University of Virginia, Department of Environmental Sciences, Charlottesville, VA, United States and Seth W Campbell, University of Maine, Earth and Climate Sciences and Climate Change Institute, Orono, United States
Reconstructing the Dynamics of a Meandering River in an Intensively Managed Landscape through Analysis of Floodplain Deposits (1138578)
Poushalee Banerjee, University of Illinois at Urbana-Champaign, Geography and GIS, Urbana, United States, Bruce L Rhoads, University of Illinois at Urbana Champaign, Geography and GIS, Urbana, IL, United States, Alison M Anders, University of Illinois at Urbana Champaign, Geology, Urbana, IL, United States and Andrew Stumpf, Illinois State Geological Survey, Champaign, IL, United States
Evolution of Soils and Erosion Rates on Recent Post-glacial Landscapes in the Coastal Temperate Rainforest of Southeast Alaska (1155973)
Raquel de Castro Portes1, Diogo Spinola2, Luke Sedor Protti3, Michael Ketterer4, Frances E Biles5, Randy Hesser6, Rebecca Lybrand7 and David V D'Amore5, (1)Bates College, Earth and Climate Sciences, Lewiston, United States, (2)University Alaska Fairbanks, Fairbanks, United States, (3)Bates College, Lewiston, United States, (4)Northern Arizona University, Flagstaff, United States, (5)Pacific Northwest Research Station, USDA Forest Service, Juneau, AK, United States, (6)Pacific Northwest Research Station - Juneau, Juneau, United States, (7)University of Arizona, Tucson, United States
Determining Genetic Origins of Paleoproterozoic Diamictites Using Anisotropy of Magnetic Susceptibility (AMS) (1156649)
Miles Harbury, University of Wisconsin Milwaukee, Milwaukee, WI, United States, John Isbell, University of Wisconsin-Milwaukee, Department of Geosciences, Milwaukee, WI, United States and Julie A Bowles, University of Wisconsin Milwaukee, Geosciences, Milwaukee, WI, United States
Bedrock valley morphology and tributary basin organization records signatures of lithology and transience across the Upper Mississippi River Valley (1161441)
Jedidiah Dale, Washington University in St Louis, St. Louis, MO, United States, Claire C Masteller, Washington University in St. Louis, Earth and Planetary Sciences, St. Louis, United States, José Antonio Constantine, Williams College, Geosciences, Williamstown, MA, United States and Henry Chandler, Washington University in Saint Louis, Earth and Planetary Sciences, Saint Louis, United States
Investigating Drivers of Changes in Proglacial Stream Suspended Sediment Concentration Using Large-Scale Remote Sensing (1161515)
Lily Vowels1, William H Armstrong Jr1, Brianna Rick2, Irina Overeem3 and Daniel McGrath4, (1)Appalachian State University, Geological and Environmental Sciences, Boone, NC, United States, (2)Colorado State University, Geosciences Department, Fort Collins, CO, United States, (3)University of Colorado, Institute of Arctic and Alpine Research and Department of Geological Sciences, Boulder, CO, United States, (4)Colorado State University, Department of Geosciences, Fort Collins, United States
Planform recovery of fluvial networks following deglaciation of the Central Lowlands, USA is achieved in ~50,000 years (1050618)
Alison M Anders, University of Illinois at Urbana Champaign, Urbana, IL, United States and Nooreen Amina Meghani, University of Illinois at Urbana Champaign, Geology, Urbana, IL, United States
