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.