USGS Coastal and Marine Geology Program

Coastal & Marine Geology Program

Field Activity Details for field activity 1999-014-FA

Other ID: none

Status: Completed

Organization(s): USGS, Woods Hole Coastal and Marine Science Center

Funding Program(s):

Principal Investigator(s): David Twichell

Affiliate Investigator(s): University of Nevada at Las Vegas

Information Specialist(s): David Twichell

Data Type(s): Location-Elevation: Navigation, Seismics: Boomer, Sonar: Sidescan, Sonar: Single Beam

Scientific Purpose/Goals: Complete coverage sidescan sonar mosaic and dense grid of chirp sub-bottom profiles of Boulder Basin and Las Vegas Bay parts of Lake Mead to serve as base map for other environmental studies.


Start Date: 1999-05-12

Start Port/Location: Callville Bay Marina, Lake Mead, NV

End Date: 1999-05-26

End Port/Location: Callville Bay Marina, Lake Mead, NV

Equipment Used: SIS1000 Sidescan sonar, Echosounder, GPS (wh), Boomer, Single channel hydrophone

Information to be Derived:

Summary of Activity and Data Gathered: No web site exists yet, but preliminary interpretation of results from this field operation are summarized in USGS Open-File Report 99-581.

Staff: VeeAnn Atnipp Cross, Kenneth E. Parolski, David Twichell

Affiliate Staff:
Mark Rudin

Notes: Original Center People field contained: Dave Twichell - PI; Ken Parolski - Electronics tech; VeeAnn Cross - Seismic and sidescan processor.
Project = Geophysical investigation of Lake Mead, Geophysical investigation of Lake Mead


Lake Mead, Nevada, Arizona, United States, North America;

North: 36.2 South: 36 West: -114.9 East: -114.6


photo of Houseboat-200


Cross, V.A.A., and Twichell, David C., 2003, Archive of seismic-reflection data collected during USGS Cruise Lake Mead 99014 in Lake Mead - Nevada and Arizona, 14-25 May, 1999: .

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: URL:

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: URL:

Twichell, D.C., Cross, VeeAnn A., Rudin, Mark J., and Parolski, Kenneth F., 2000, 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: 28 URL:

Twichell, D.C., Cross, VeeAnn A., Rudin, Mark J., Parolski, Kenneth F., and Rendigs, Richard R., 2001, Surficial geology and distribution of post-impoundment sediment in Las Vegas Bay, Lake Mead: 27 URL:

Data Acquired

Survey EquipmentSurvey InfoData Type(s)Data Collected
SIS1000 Sidescan sonar --- Boomer
Sidescan mosaic ( )
1999-014-FA-SO-001-01 ( Sidescan mosaic images)
Echosounder --- Single Beam
Bathymetry GIS data ( )
GPS (wh) --- Navigation
1999-014-FA-LN-001 ( navigation data)
Boomer --- Boomer
Single channel hydrophone --- Air Gun / Water Gun
Bubble Gun
Sub Bottom Profiler
Boomer seismic data ( )
1999-014-FA-SE-001-02 ( Interpreted seismic data images)
1999-014-FA-SE-001-01 ( RAW seismic data images)
1999-014-FA-SE-001-03 ( Raw SEGY data)