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Interpreting origins of landform sediment assemblages within the Upper Mississippi River Valley and tributaries in the Twin Cities area of Minnesota

By
Curtis M. Hudak
Curtis M. Hudak
Foth Infrastructure and Environment, LLC, 8550 Hudson Boulevard North, Lake Elmo, Minnesota 55042, USA
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;
Edwin R. Hajic
Edwin R. Hajic
Foth Infrastructure and Environment, LLC, 8550 Hudson Boulevard North, Lake Elmo, Minnesota 55042, USA
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;
Jeffery J. Walsh
Jeffery J. Walsh
Foth Infrastructure and Environment, LLC, 8550 Hudson Boulevard North, Lake Elmo, Minnesota 55042, USA
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Published:
January 01, 2011

ABSTRACT

This field trip will highlight landform sediment assemblages and the geomorphic consequences and timing of multiple significant deglacial flood events at and near the confluences of the Minnesota and St. Croix rivers with the Upper Mississippi Valley. This geographic position is also near the former margins of two different Late Wisconsin glacial ice fronts. New radiocarbon and optical spectral luminescence (OSL) ages collected from these landform sediment assemblages are presented to help date the geomorphically transformative Late Wisconsin and earliest Holocene flood events of this complicated river confluence setting. Trip discussions will include pre–Late Wisconsin bedrock valley fill; geomorphology and gradients of genetically related terraces in the Upper Mississippi Valley and major west-side tributaries; comparisons between radiocarbon and OSL dating results; GIS mapping technologies and data sets; and contexts and predictions for buried archaeological resources.

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Contents

GSA Field Guide

Archean to Anthropocene: Field Guides to the Geology of the Mid-Continent of North America

James D. Miller
James D. Miller
Department of Geological Sciences and Precambrian Research Center University of Minnesota-Duluth Duluth, Minnesota 55812 USA
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;
George J. Hudak
George J. Hudak
Precambrian Research Center Natural Resources Research Institute 5013 Miller Trunk Highway Duluth, Minnesota 55811 USA
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;
Chad Wittkop
Chad Wittkop
Department of Chemistry and Geology Minnesota State University Mankato, Minnesota 56001 USA
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;
Patrick I. McLaughlin
Patrick I. McLaughlin
Wisconsin Geological and Natural History Survey Madison, Wisconsin 53705 USA
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Geological Society of America
Volume
24
ISBN electronic:
9780813756240
Publication date:
January 01, 2011

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