Other ID: MEAD 01007; IB H-1-01-GC
Organization(s): USGS, Woods Hole Coastal and Marine Science Center
Location: Lake Mead, Nevada, Arizona, United States, North America;
Principal Investigator(s): David Twichell
Affiliate Investigator(s): Mark Rudin, UNLV
Information Specialist(s): David Twichell
Data Type(s): Location-Elevation: Navigation, Seismics: Boomer
Scientific Purpose/Goals: Sidescan sonar and high-resolution seismic reflection mapping of Lake Mead to map the surficial geology of the lake floor and the thickness and distribution of post-impoundment sediment in the lake.
Start Date: 2001-04-01
Start Port/Location: Callville Bay Marina, NV
End Date: 2001-04-26
End Port/Location: Callville Bay Marina, NV
Equipment Used: SIS1000 Sidescan sonar, Boomer, Plugger GPS, HYPACK, Single channel hydrophone
Information to be Derived:
Summary of Activity and Data Gathered: Sidescan sonar imagery and chirp sub-bottom profiles were collected along 955 km of survey tracklines. Data were collected along lines spaced 500-700 m apart and provided nearly complete sidescan coverage of the eastern two-thirds of the lake as well as a dense grid of sub-bottom profiles. Boomer sub-bottom profiles were collected along 96 km of tracks to provide deeper penetration in the areas of thick sediment cover.
Staff: VeeAnn Atnipp Cross, Kenneth E. Parolski, David Twichell, Charles Worley
Notes: Original Center People field contained: Dave Twichell - ch. sci.; Ken Parolski - mobilization and field technician; VeeAnn Cross - data processor and GIS specialist; Chuck Worley - cruise mobilization.
Cross, V.A.A., and Twichell, David C., 2003, Archive of seismic-reflection data collected during USGS Cruise Lake Mead 00027 in Lake Mead - Nevada, 1-6 June, 2000: U.S. Geological Survey Open-File Report 2003-4, DVD-ROM, .
Cross, V.A.A., and Twichell, David C., 2003, Archive of seismic-reflection data collected during USGS Cruise Lake Mead 01007 in Lake Mead, Nevada and Arizona, 1-28 April, 2001: U.S. Geological Survey Open-File Report 2002-478, DVD-ROM, .
Twichell, D.C., and Cross, V.A., 2009, 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: U.S. Geological Survey Open-File Report 2009-1150, CD-ROM, URL: http://pubs.usgs.gov/of/2009/1150/.
Twichell, D.C., Cross, VeeAnn A., and Belew, Stephen D., 2004, Mapping the floor of Lake Mead (Nevada and Arizona); preliminary discussion and GIS data release: U.S. Geological Survey Open-File Report 2003-320, DVD, URL: http://pubs.usgs.gov/of/2003/of03-320/.