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Summary Information for Field Activity 2000-056-FA

Area of Operations: Lake Mead, Arizona, Nevada, United States, North America

Dates: July 11, 2000 to July 18, 2000

Chief scientist: Dave Twichell

   Mark Rudin, UNLV

Objectives: Piston and gravity coring with a coring system provided by UNLV. Cores were primarily collected in Las Vegas Bay to describe sediment thickness and sediment types.

Type of Activity:

Information to be derived:

Summary: Cores were attempted at 17 stations using a variety of coring techniques. Cores were collected at 14 stations. Some cores were collected by divers, and 3 different gravity corers were tested as well. Most cores were collected in less than 30 m water where seismic profiles showed sediments mostly to be 0.5-2 m thick. Most of these cores were 30-70 cm long. Core recovery was poor because the fine-grained unconsolidated sediment washed out of the corer as it was being brought back to the surface. Two cores were collected in the deep part of the lake (>130 m), and these cores successfully recovered 160 and 200 cm long cores.

Contact: Dave Twichell (dtwichell@usgs.gov)

InfoBank: uses the identifier T-56-00-GC. Visit this site for more information.

Related Links:

Platform Info:
TAMARISK

Publications resulting from these data

Cross, VeeAnn 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

Twichell, David 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: U.S. Geological Survey Open-File Report 99-581, 28 p.. (Also available at http://pubs.usgs.gov/of/of99-581/)

Twichell, David 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: U.S. Geological Survey Open-File Report 01-070, 27 p.. (Also available at http://pubs.usgs.gov/of/of01-070/)

Twichell, David 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. (Also available at http://pubs.usgs.gov/of/2003/of03-320/)

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. (Also available at http://pubs.usgs.gov/of/2009/1150/)

Data Types and Locations:

Samples

 

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