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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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Table 1. Areas of the surveyed part of Lake Mead covered by alluvial deposits, rock, and thick and thin post-impoundment sediment.  All areas are in square kilometers and are shown for each of the major basins of the lake as well as the total. In addition to the coverage in square kilometers, the percentage of each interpreted lake-floor type is also shown.
 

Alluvial
Deposits
(km2)

 Rock
(km2)		 Thick
Sediment
(km2)		 Thin
Sediment
(km2)		 Totals
(km2)
Boulder Basin 32.94 51.91 22.28 4.98 112.12
Virgin Basin 65.24 5.09 19.97 4.56 94.87
Overton Arm 54.93 29.06 13.63 10.26 107.89
Temple Basin 21.19 9.54 9.69 0.67 41.08
Gregg Basin 10.23 4.12 17.35 0.72 32.41
Total area 184.53 99.72 82.93 21.19 388.37
Coverage 47.51% 25.68% 21.35% 5.46%  

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