USGS Coastal and Marine Geology Program

Coastal & Marine Geology Program

Field Activity Details for field activity 2000-027-FA

Other ID: IB C-27-00-GC

Status: Completed

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

Funding Program(s):

Principal Investigator(s): David Twichell

Affiliate Investigator(s): Mark Rudin, UNLV

Information Specialist(s): David Twichell

Data Type(s): Imagery: Photo, Imagery: Video, Location-Elevation: Navigation, Sampling: Geology, Seismics: Sub Bottom Profiler, Sonar: Sidescan, Sonar: Single Beam

Scientific Purpose/Goals: Seismic and sidescan mapping of deltas along the edge of the Las Vegas Bay part of Lake Mead to serve as a base map for coring and other environmental monitoring studies.


Start Date: 2000-05-30

Start Port/Location: Las Vegas Bay Marina

End Date: 2000-06-09

End Port/Location: Las Vegas Bay Marina

Equipment Used: GPS (wh), ARGO, Edgetech DF-1000 sidescan sonar, Echosounder, Knudsen CHIRP Sub-bottom Profiler

Information to be Derived:

Summary of Activity and Data Gathered:

Staff: Kenneth E. Parolski, VeeAnn Atnipp Cross

Affiliate Staff:
Mark Rudin
co-chief scientist

Notes: A second component of the field work will include coring that will be completed during the week of July 11-18. This part of the work will require a P-code navigation system with a navigation laptop with MapInfo on it. The rest of the coring gear will come from elsewhere. Original Center People field contained: Ken Parolski - sidescan/seismic tech., VeeAnn Cross - data processor.
Project = Lake Mead Geophysical Survey, Lake Mead Geophysical Survey


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

North: 36.14 South: 36.08 West: -114.88 East: -114.73


photo of Commodore


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: .

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
GPS (wh) --- Navigation
Nav data ( )
ARGO --- Photo
Edgetech DF-1000 sidescan sonar --- Sidescan
Sidescan mosaic ( )
Echosounder --- Single Beam
Bathymetry GIS data ( )
Knudsen CHIRP Sub-bottom Profiler --- Sub Bottom Profiler
Chirp seismic data ( )
2000-027-FA-SE-001 ( Raw SEGY data)