NDLI: Radar analysis of the Grand Island Tombolo, MI, USA: A case study for coastal landscapes

Content Provider	IEEE Xplore Digital Library
Author	Morrison, S.M. Jol, H.M. Loope, W.
Copyright Year	2014
Description	Author affiliation: Univ. of Wisconsin-Eau Claire, Eau Claire, WI, USA (Morrison, S.M.; Jol, H.M.) \|\| United States Geol. Survey, Munising, MI, USA (Loope, W.)
Abstract	Subsurface stratigraphy provides insight into the genesis and evolution of coastal landscapes. Since ground penetrating radar (GPR) provides an ideal way to image subsurface stratigraphy it is commonly used to help understand how coastal landscapes evolve. The Lake Superior shoreline provides an excellent opportunity to study coastal environments. Grand Island, Michigan, USA is the largest island on the southern shore of Lake Superior and consists of several geomorphic features including bedrock highs connected by a sandy tombolo. A GPR transect of the Grand Island Tombolo utilized a pulseEKKO 100 GPR system with 100 MHz antennae, 1.0 m seperation and step size of 0.5 m. An average depth of penetration of 25 m was determined after analysis of a common midpoint survey. A Topcon RL-H3CL laser level was used to collect topographic data to adjust profiles for changes in relief. Radar stratigraphic analysis divides the profile into four radar facies. The deepest radar facies include packages of sigmoid and hummocky reflections. A second radar facies downlaps lower radar facies and consists of northward dipping inclined reflections. A third radar facies, concordant with lower radar facies, includes continuous subhorizontal to inclined reflections. The upper radar facies down laps lower radar facies with northward dipping inclined reflections. Our interpretations indicate radar facies relate to shoreface and beach progradational phases of the Grand Island Tombolo's.
Starting Page	245
Ending Page	249
File Size	2908047
Page Count	5
File Format	PDF
ISBN	9781479967896
DOI	10.1109/ICGPR.2014.6970423
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2014-06-30
Publisher Place	Belgium
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Lake Superior Geology Lakes Reflection Coastal landscape Antennas Manganese regression and transgression radar stratigraphy
Content Type	Text
Resource Type	Article

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