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USGS Coastal and Marine Geology Program

Field Activity Details for field activity 2001-007-FA

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Other ID: MEAD 01007; IB H-1-01-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): Seismics: Sub Bottom Profiler, Location-Elevation: Navigation, Seismics: Boomer, Sonar: Sidescan, Sonar: Single Beam

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.

Vehicle(s):

Start Port/Location: Callville Bay Marina, NV

End Port/Location: Callville Bay Marina, NV

Start Date: 2001-04-01

End Date: 2001-04-26

Equipment Used: SIS1000 Chirp Sonar, Boomer, HYPACK, Single channel hydrophone, P-code GPS, Echosounder, SIS1000 Sidescan sonar

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 Cross, Kenneth F. Parolski, David Twichell, Charles Worley

Affiliate Staff:
Mark Rudin
UNLV

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.
Project = Lake Mead Sediment Study, Lake Mead Sediment Study

Location:

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

Boundaries
North: 36.5 South: 36 West: -114.77 East: -114.01

Platform(s):


Houseboat-200

Publications

Cross, V.A., and Twichell, D.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, https://doi.org/10.3133/ofr02478.

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, https://doi.org/10.3133/ofr20091150.

Twichell, D.C., Cross, V.A., and Belew, S.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: https://doi.org/10.3133/ofr03320.

Portals/Viewers

FAN 2001-007-FA has data viewable in the GeoMappApp/Virtual Ocean applications. To view this data in these applications go to http://www.geomapapp.org/ and http://www.virtualocean.org/. See the instructions for locating USGS data in these applications. You can also view the imagery created from the SEGY data at https://cmgds.marine.usgs.gov/images.php?cruise=2001-007-FA.

Documents associated with this activity

Title Survey Equipment Description
Navigation log P-code GPS Technicians' navigation logbook of time, line and file changes, equipment and data acquisition notes.
Geophysics log Boomer Technicians' seismic logbook of time, line and file changes, equipment configuration, and data acquisition notes
ISIS log SIS1000 Sidescan sonar Technicians' ISIS system logbook of time, line and file changes, equipment performance and data acquisition notes.

Data Acquired

Survey EquipmentSurvey InfoData Type(s)Data Collected
SIS1000 Chirp Sonar --- Sub Bottom Profiler
2001-007-FA-SE-001 (Raw SEGY chirp data)
2001-007 seismic reflection profile images (Profile images of both the Chirp and boomer datasets. Includes the profile images as well as images with interpretation lines.)
Chirp seismic data (Chirp SEG-Y data on CMGDS)
Boomer --- Boomer
HYPACK --- Navigation
Single channel hydrophone --- Air Gun / Water Gun
Boomer
Bubble Gun
Sparker
Sub Bottom Profiler
2001-007-FA-SE-002 (Raw SEGY boomer data)
2001-007 Boomer navigation (Boomer trackline navigation)
2001-007 seismic reflection profile images (Profile images of both the Chirp and boomer datasets. Includes the profile images as well as images with interpretation lines.)
Boomer seismic data (Boomer SEG-Y data on CMGDS)
P-code GPS --- Navigation
Nav data (All navigation acquired on the field activity.)
Echosounder --- Single Beam
Bathymetry GIS data
SIS1000 Sidescan sonar --- Sidescan
Enhanced Sidescan mosaic - Overton Arm (Tone-matched enhanced TIFF sidescan-sonar image from Overton Arm, Lake Mead - UTM projection)
Enhanced Sidescan mosaic - Temple Basin & Iceberg Canyon (Tone-matched enhanced TIFF sidescan-sonar image from Temple Basin & Iceberg Canyon, Lake Mead - UTM projection)
Enhanced Sidescan mosaic - Virgin Basin (Tone-matched enhanced TIFF sidescan-sonar image from Virgin Basin, Lake Mead - UTM projection)

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