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  3. High-resolution geophysical data collected in the vicinity of Buffalo Reef, Michigan, within Lake Superior, U.S. Geological Survey Field Activity 2018-043-FA
  4. Seismic Reflection, EdgeTech SB-424 Chirp profile images collected in the vicinity of Buffalo Reef, Michigan, within Lake Superior, during USGS field activity 2018-043-FA, (PNG Images)

Seismic Reflection, EdgeTech SB-424 Chirp profile images collected in the vicinity of Buffalo Reef, Michigan, within Lake Superior, during USGS field activity 2018-043-FA, (PNG Images)

Dates

Publication Date
Start Date
2018-09-18
End Date
2018-09-25

Citation

Andrews, B.D., Barnhardt, W.W., Foster, D.S., Irwin, B.J., and Nichols, A.R., 2020, High-resolution geophysical data collected in the vicinity of Buffalo Reef, Michigan, within Lake Superior, U.S. Geological Survey Field Activity 2018-043-FA: U.S. Geological Survey data release, https://doi.org/10.5066/P9K4HX8V.

Summary

In September 2018, the U.S. Geological Survey, in collaboration with the U.S. Army Corps of Engineers, conducted high-resolution geophysical mapping and sediment sampling to determine the distribution of historical mine tailings on the floor of Lake Superior. Large amounts of waste material from copper mining, locally known as “stamp sands,” were dumped into the lake in the early 20th century, with wide-reaching consequences that have continued into the present. Mapping was focused offshore of the town of Gay on the Keweenaw Peninsula of Michigan, where ongoing erosion and re-deposition of the stamp sands has buried miles of native, white-sand beaches. Stamp sands are also encroaching onto Buffalo Reef, a large area of cobble/boulder [...]

Contacts

Contact :
David S Foster
Author :
Brian D Andrews, Walter Barnhardt, David S Foster, Barry J Irwin, Alexander R Nichols
USGS Mission Area :
Coastal and Marine Hazards and Resources Program
Data Owner :
Woods Hole Coastal and Marine Science Center
Distributor :
U.S. Geological Survey - ScienceBase

Attached Files

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2018-043-FA_Edgetech424_Images_meta.xml
“metadata”
Original FGDC Metadata
View 		21.84 KB application/fgdc+xml
2018-043-FA_EdgeTech424_Images.zip
“zip file” 		516.04 MB application/zip
2018-043-FA_EdgeTech424_Images_browse.jpg
“browse image” 		thumbnail 229.38 KB image/jpeg

Purpose

These PNG images represent approximately 272 km of chirp seismic-reflection data collected by the U.S. Geological Survey during cruise 2018-043-FA along Traverse Bay, Lake Superior. This information allows for spatial correlation of chirp seismic-reflection profiles images with other geophysical and sample data for investigating lake-floor morphology and stratigraphy in the area. Images of each seismic profile were generated in order to provide portable and easily viewable alternatives to the SEGY versions of the data. Each profile image can be hotlinked to its corresponding trackline navigation contained within the Esri polyline shapefile '2018-043-FA_Edgetech424_Tracklines.shp'. Shot-point index marks along the top of the PNG images correlate to the positions of 500 shot intervals within the Esri point shapefile '2018-043-FA_Edgetech424_500sht.shp'.
browse image
browse image

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