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 |
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.
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.
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. |
Survey Equipment | Survey Info | Data 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) |