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U.S. Geological Survey Open-File Report 2009-1150

Surficial Geology of the Floor of Lake Mead (Arizona and Nevada) as Defined by Sidescan-Sonar Imagery, Lake-Floor Topography, and Post-Impoundment Sediment Thickness


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Figure 4, sidescan-sonar image (top panel) and interpretation (bottom panel) from Virgin Canyon, and link to larger image.
Figure 4. Sidescan-sonar image from Virgin Canyon showing the uniform high-backscatter signature (light tones) associated with rock outcrops.  The top panel shows the sidescan-sonar image and the color-hillshade relief image of the surrounding area and indicates the steepness of the walls flanking this part of the lake.  The bottom panel shows the interpretation of the sidescan-sonar image. See figure 1 for the location of this figure. Click on figure for larger image.


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