Archean to Anthropocene: Field Guides to the Geology of the Mid-Continent of North America
This volume of 25 field guides plus one paper on field instruction was prepared in conjunction with the 2011 GSA Annual Meeting in Minneapolis, Minnesota. The diverse slate of field trips spans a geologically broad range of topics, including the Precambrian geology of the southern Canadian Shield; the economic geology of the Lake Superior region; Phanerozoic strata in Minnesota, Wisconsin, Iowa, and North Dakota; glacial geology; hydrogeology and limnology; undergraduate and K12 geoscience field education; archaeological investigations in the upper Mississippi River valley; and geology by bicycle.
Interpreting origins of landform sediment assemblages within the Upper Mississippi River Valley and tributaries in the Twin Cities area of Minnesota
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Published:January 01, 2011
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CiteCitation
Curtis M. Hudak, Edwin R. Hajic, Jeffery J. Walsh, 2011. "Interpreting origins of landform sediment assemblages within the Upper Mississippi River Valley and tributaries in the Twin Cities area of Minnesota", Archean to Anthropocene: Field Guides to the Geology of the Mid-Continent of North America, James D. Miller, George J. Hudak, Chad Wittkop, Patrick I. McLaughlin
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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.
- absolute age
- archaeology
- C-14
- carbon
- Cenozoic
- Dakota County Minnesota
- dates
- field trips
- floods
- fluvial features
- geographic information systems
- geologic hazards
- geomorphology
- glacial features
- Goodhue County Minnesota
- Holocene
- information systems
- isotopes
- landform evolution
- lower Holocene
- Minnesota
- Minnesota River valley
- Mississippi Valley
- natural hazards
- optically stimulated luminescence
- outwash plains
- paleolakes
- Pleistocene
- Quaternary
- radioactive isotopes
- road log
- sediments
- tributaries
- United States
- Upper Mississippi Valley
- upper Pleistocene
- upper Wisconsinan
- Wisconsinan
- Saint Croix River
- Lake Pepin