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Middle-Holocene mobilization of aeolian sand in western upper Michigan and the potential relationship with climate and fireDepartment of Geography, Michigan State University, East Lansing, Michigan 48824-1115, USA; arbogas2{at}msu.edu
Institute of Geography and Earth Sciences, University of Wales, Aberystwyth SY 23 3DB, UK A forested dunefield covers the Baraga Plains in western upper Michigan. The ages of five dunes, from across the dunefield, were determined by optically stimulated luminescence (OSL), employing the single-aliquot regenerative-dose (SAR) method on quartz grains. The results indicate that sand mobilization was restricted to the middle Holocene, at around 7 ka. Four environmental variables, rapid climatic oscillations, fire, strong winds and a dry climate are invoked as a combined cause of dune formation. This study provides further evidence for the wide extent of aeolian activity in the upper Midwest of North America during the middle Holocene.
Key Words: Dunes Michigan middle Holocene optically stimulated luminescence OSL dating fire aeolian sand
The Holocene, Vol. 14, No. 3,
464-471 (2004) This article has been cited by other articles:
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