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The ancestral Mississippi drainage archived in the late Wisconsin Mississippi deep-sea fan

A. Fildani, M. P. McKay, Daniel F. Stockli, J. Clark, M. L. Dykstra, L. Stockli and A. M. Hessler
The ancestral Mississippi drainage archived in the late Wisconsin Mississippi deep-sea fan
Geology (Boulder) (June 2016) 44 (6): 479-482


The response of continental-scale drainage systems to short-term (i.e., millennial-scale) climate change is unknown but has wide implications for understanding climate feedbacks and terrestrial-marine fluxes. The late Wisconsin Mississippi River to deep-sea fan of North America was one of Earth's largest sediment-routing networks during the most recent glacio-eustatic cycle. To understand late Pleistocene sediment production and dispersal related to the partly glaciated, ancestral Mississippi system, we sampled late Wisconsin deep-sea fan channel-fill and lobe deposits for detrital zircon U-Pb and (U-Th)/He double-dating analyses, from Deep Sea Drilling Project (Leg 96) cores and U.S. Geological Survey piston cores. Our results suggest a late Pleistocene glacial Mississippi system that forced a larger transfer of sediment from Cordilleran magmatic provinces and the Canadian Shield when compared to the modern drainage. This indicates a potentially more expansive and/or erosive ancestral Mississippi catchment, and the efficient dispersal of terrigenous sediment, nutrients, and solutes into the deep-sea via high-discharge meltwater and glacial-lake outbursts during ice retreat.

ISSN: 0091-7613
EISSN: 1943-2682
Serial Title: Geology (Boulder)
Serial Volume: 44
Serial Issue: 6
Title: The ancestral Mississippi drainage archived in the late Wisconsin Mississippi deep-sea fan
Affiliation: Statoil, Austin, TX, United States
Pages: 479-482
Published: 201606
Text Language: English
Publisher: Geological Society of America (GSA), Boulder, CO, United States
References: 26
Accession Number: 2016-076714
Categories: Quaternary geologyGeochronology
Document Type: Serial
Bibliographic Level: Analytic
Annotation: GSA Data Repository item 2016160
Illustration Description: illus. incl. geol. sketch map
N25°04'04" - N27°11'37", W91°24'33" - W85°59'31"
Secondary Affiliation: Missouri State University, USA, United StatesUniversity of Texas at Austin, USA, United StatesDeep Time Institute, USA, United States
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data from GeoScienceWorld, Alexandria, VA, United States. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States
Update Code: 201637
Program Name: DSDPDeep Sea Drilling Project
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