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Sand in lakes and bogs in Allegan County, Michigan, as a proxy for eolian sand transport

DeVries-Zimmerman, Suzanne; Fisher, Timothy G.; Hansen, Edward C.; Dean, Sarah and Björck, Svante LU (2014) In Geological Society of America. Special Papers 508. p.111-131
Abstract
Accurately reconstructing the rate of movement and extent of eolian dunes over thousands of years is a challenging endeavor. In this paper, we refine the methodology for utilizing lakes and bogs downwind of dune fields as precise recorders of past eolian activity. Sediment cores from two Allegan County lakes and one bog associated with dunes were studied to evaluate the importance of the various sand transport pathways into lakes and bogs. Goshorn Lake's western edge directly abuts a large parabolic dune. Sand concentrations decrease in cores away from the dunes, possibly reflecting avalanching into the lake followed by sediment gravity flows along the lake bottom. Sand input from stream flow was minor. The Allegan Bog core records a... (More)
Accurately reconstructing the rate of movement and extent of eolian dunes over thousands of years is a challenging endeavor. In this paper, we refine the methodology for utilizing lakes and bogs downwind of dune fields as precise recorders of past eolian activity. Sediment cores from two Allegan County lakes and one bog associated with dunes were studied to evaluate the importance of the various sand transport pathways into lakes and bogs. Goshorn Lake's western edge directly abuts a large parabolic dune. Sand concentrations decrease in cores away from the dunes, possibly reflecting avalanching into the lake followed by sediment gravity flows along the lake bottom. Sand input from stream flow was minor. The Allegan Bog core records a fenemergent bog transition coincident with a decrease in the sand influx. Poorly understood shoreline processes may have contributed sand to the basin's center before the bog's emergence. Sand in Gilligan Lake cores is texturally similar to adjacent dune sand and the eolian activity history derived from this sand is nearly identical to the history derived from the dune's paleosols and optically stimulated luminescence ages. A proposed lake and bog sampling strategy includes choosing sites in the lee of large dunes edged with emergent vegetation and away from steep slopes or stream inlets. The lake's bathymetry should also be considered. Distinguishing between grain fall sedimentary structures and mass movement or sediment gravity flows is important. This strategy provides relatively high resolution, continuous eolian activity histories that can be correlated with paleoenvironmental proxies from the same cores. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Geological Society of America. Special Papers
volume
508
pages
111 - 131
publisher
Geological Society of America
external identifiers
  • wos:000342837200008
  • scopus:84907518676
ISSN
0072-1077
DOI
10.1130/2014.2508(07)
project
MERGE
language
English
LU publication?
yes
id
8a450299-baab-4fb0-84be-1aef10c31e22 (old id 4800430)
date added to LUP
2014-12-01 09:28:36
date last changed
2017-08-27 04:35:26
@article{8a450299-baab-4fb0-84be-1aef10c31e22,
  abstract     = {Accurately reconstructing the rate of movement and extent of eolian dunes over thousands of years is a challenging endeavor. In this paper, we refine the methodology for utilizing lakes and bogs downwind of dune fields as precise recorders of past eolian activity. Sediment cores from two Allegan County lakes and one bog associated with dunes were studied to evaluate the importance of the various sand transport pathways into lakes and bogs. Goshorn Lake's western edge directly abuts a large parabolic dune. Sand concentrations decrease in cores away from the dunes, possibly reflecting avalanching into the lake followed by sediment gravity flows along the lake bottom. Sand input from stream flow was minor. The Allegan Bog core records a fenemergent bog transition coincident with a decrease in the sand influx. Poorly understood shoreline processes may have contributed sand to the basin's center before the bog's emergence. Sand in Gilligan Lake cores is texturally similar to adjacent dune sand and the eolian activity history derived from this sand is nearly identical to the history derived from the dune's paleosols and optically stimulated luminescence ages. A proposed lake and bog sampling strategy includes choosing sites in the lee of large dunes edged with emergent vegetation and away from steep slopes or stream inlets. The lake's bathymetry should also be considered. Distinguishing between grain fall sedimentary structures and mass movement or sediment gravity flows is important. This strategy provides relatively high resolution, continuous eolian activity histories that can be correlated with paleoenvironmental proxies from the same cores.},
  author       = {DeVries-Zimmerman, Suzanne and Fisher, Timothy G. and Hansen, Edward C. and Dean, Sarah and Björck, Svante},
  issn         = {0072-1077},
  language     = {eng},
  pages        = {111--131},
  publisher    = {Geological Society of America},
  series       = {Geological Society of America. Special Papers},
  title        = {Sand in lakes and bogs in Allegan County, Michigan, as a proxy for eolian sand transport},
  url          = {http://dx.doi.org/10.1130/2014.2508(07)},
  volume       = {508},
  year         = {2014},
}