The Geomorphology of Dunes Along the Western Shoreline of Lake Michigan: Disseminating NSF-REU Data...
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Transcript of The Geomorphology of Dunes Along the Western Shoreline of Lake Michigan: Disseminating NSF-REU Data...
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
Study Area
All LiDAR Courtesy of Door County, WI
Dott and Attig
Baedke and Thompson 2000
~1Km
Clark Lake
•~0.75 km wide•Small parabolic dunes (3-7 m)
•Large parabolic dunes (18-24 m)
•~0.8 km wide• 0.35 km separating
•Large Beach Ridge/Parabolic Dune Complex
•Lower Relief Dunes
Kangaroo Lake
Europe
•~0.3 km wide•Large Beach Ridge
• Smaller Beach Ridges•No Parabolic Dune Forms
Europe Lake
Elevations from LiDAR
GPR Ground Penetrating Radar
Dave Hart WGNHS
Bucket Augering for Particle-Size Analysis and StratigraphicInterpretation of GPR
Laser Diffraction PSA
• Estimating burial ages based on the abundance of energy stored in sand grains.
Optically Stimulated Luminescnce Age Estimate
Methods following Rawling et al 2008
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
Probability Plot From Clark Lake
Vibracoring to reach underlying lake sediments below the water table
Dissemination…..
What’s the best format to get this information in the classroom?
Is the data provided here a good template for a future website?
Europe
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
DUGG 2010 Crew
DUGG 2011 Crew
DUGG 2012 Crew
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.