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Surficial Geology and Distribution of Post-Impoundment Sediment of the Western Part of Lake Mead Based on a Sidescan Sonar and High-Resolution Seismic-Reflection Survey

Figure 12..   Sidescan sonar image from Las Vegas Bay (location in inset) showing the low-backscatter sediment cover in the narrow valley floor and the high-backscatter signature from the rock faces adjacent to the floor. Sediment cover is thin as patches of high-backscatter rock outcrop are present in the floor of the valley. Seismic profiles (locations shown on sidescan image) show the flat-floored nature of the valley and that sediment here is less than 2 m thick. Note rock outcrop on line 41 that also shows on the sidescan image.

Click on figure for larger image.
Figure 12. Sidescan sonar image from Las Vegas Bay showing the low-backscatter sediment cover in the narrow valley floor and the high-backscatter signature from the rock faces adjacent to the floor.


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