the geomorphology of dunes along the western shoreline of lake michigan: disseminating nsf-reu data...
TRANSCRIPT
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The Geomorphology of Dunes Along the
Western Shoreline of Lake Michigan:
Disseminating NSF-REU Data in the Classroom
J Elmo Rawling 3rd UW-PlattevillePaul Hanson UN-LincolnDave Hart WGNHSNational Science Foundation Grant #EAR-0850024Research Experience for Undergraduates Grant
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Study Area
All LiDAR Courtesy of Door County, WI
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Dott and Attig
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Baedke and Thompson 2000
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~1Km
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Clark Lake
•~0.75 km wide•Small parabolic dunes (3-7 m)
•Large parabolic dunes (18-24 m)
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•~0.8 km wide• 0.35 km separating
•Large Beach Ridge/Parabolic Dune Complex
•Lower Relief Dunes
Kangaroo Lake
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Europe
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•~0.3 km wide•Large Beach Ridge
• Smaller Beach Ridges•No Parabolic Dune Forms
Europe Lake
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Elevations from LiDAR
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GPR Ground Penetrating Radar
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Dave Hart WGNHS
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Bucket Augering for Particle-Size Analysis and StratigraphicInterpretation of GPR
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Laser Diffraction PSA
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• Estimating burial ages based on the abundance of energy stored in sand grains.
Optically Stimulated Luminescnce Age Estimate
Methods following Rawling et al 2008
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UNL Lab Depth U Th K20 In Situ Dose Rate De (Gy) Aliquots Optical Age
# (m) (ppm) (ppm) (wt %) H20 (%)a(Gy/ka) ± 1 Std. Err. (n)
b± 1 σ
UNL-2755 1.3 0.4 1.5 1.2 4.1 1.27 ± 0.09 5.2 ± 0.4 22/27 4.1 ± 0.5
UNL-2760 1.3 0.6 2.1 1.8 4.1 1.84 ± 0.13 3.6 ± 0.2 20/27 1.9 ± 0.2
UNL-2873 2.7 0.8 2.0 1.7 4.2 1.75 ± 0.12 4.2 ± 0.2 23/37 2.4 ± 0.2
UNL-2758 1.4 0.4 1.8 1.6 5.4 1.59 ± 0.12 4.1 ± 0.5 23/34 2.6 ± 0.4
UNL-2863 2.5 0.6 2.6 1.8 4.1 1.80 ± 0.12 4.7 ± 0.5 20/24 2.6 ± 0.3
UNL-2763 1.9 0.5 1.5 1.0 4.3 1.27 ± 0.17 6.0 ± 0.6 24/42 5.2 ± 0.6
UNL-2759 1.4 0.5 1.9 1.4 3.3 1.50 ± 0.10 6.4 ± 0.4 27/40 4.3 ± 0.4
UNL-2761 1.3 0.3 1.1 0.7 7.0 0.83 ± 0.06 6.4 ± 0.4 21/39 7.8 ± 0.9
UNL-2756 1.2 0.6 1.6 1.3 7.7 1.35 ± 0.11 7.0 ± 0.4 35/53 5.2 ± 0.5
UNL-2864 1.5 0.5 1.8 1.2 3.5 1.33 ± 0.12 5.3 ± 0.3 26/34 4.0 ± 0.4
UNL-2865 1.1 0.7 2.0 1.5 4.9 1.60 ± 0.11 7.7 ± 0.7 21/26 4.8 ± 0.6
UNL-2866 1.1 0.4 2.0 1.2 4.2 1.28 ± 0.08 4.8 ± 0.3 28/32 3.8 ± 0.4
UNL-2867 1.7 0.6 2.1 1.1 3.8 1.30 ± 0.08 5.7 ± 0.4 20/26 4.4 ± 0.4
UNL-2868 1.6 0.6 2.2 1.2 4.0 1.33 ± 0.08 5.9 ± 0.4 22/31 4.4 ± 0.5
UNL-2869 1.5 0.6 1.9 1.5 3.9 1.57 ± 0.10 5.4 ± 0.4 21/29 3.4 ± 0.3
UNL-2870 1.4 0.6 2.0 1.4 4.7 1.50 ± 0.10 6.2 ± 0.3 20/26 4.1 ± 0.4
UNL-2871 1.7 0.5 1.9 1.7 3.7 1.68 ± 0.11 2.5 ± 0.6 20/39 1.5 ± 0.4
UNL-2872 1.5 0.6 2.1 1.3 3.5 1.42 ± 0.09 3.8 ± 0.5 20/34 2.7 ± 0.4
Optical Agessamples from the same site
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Probability Plot From Clark Lake
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Vibracoring to reach underlying lake sediments below the water table
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Dissemination…..
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What’s the best format to get this information in the classroom?
Is the data provided here a good template for a future website?
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Europe
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Potential Assignment Topics = Determining the Elevation of Past Lake Levels
Tracing Shorelines with LiDAR/Using LiDAR to get elevations
Combining LiDAR, PSD and GPR Data
Others?
OSL Dates
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DUGG 2010 Crew
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DUGG 2011 Crew
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DUGG 2012 Crew
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Thanks for listening.
Baedke, S.J., Thompson, T.A., 2000. A 4,700 year record of lake level and isostasy for Lake Michigan. J. Great Lakes Res. 26, 416– 426.
Dott, R.H., and Attig J.W. 2004.Roadside Guide to the Geology of Wisconsin. Mountain Press.
Rawling III, J. E., P. R. Hanson, A. R. Young, and J. W. Attig. 2008. Late Pleistocene dune construction in the Central Sand Plain of Wisconsin, USA. Geomorphology 100 (3-4): 494–505.