Citation_Information:
Originator: Jane F. Denny
Publication_Date: Unpublished material
Title:
SEG-Y format chirp seismic data from geophysical surveys of Bear Lake, Utah-Idaho, 2002
Geospatial_Data_Presentation_Form: raster
Publication_Information:
Publication_Place: Woods Hole Coastal and Marine Science Center, Woods Hole, MA
Publisher: U.S. Geological Survey, Coastal and Marine Geology Program
Other_Citation_Details:
The online link is to the field activity page. See the supplemental information and distribution section for additional information regarding viewing and downloading the data.
Online_Linkage: https://cmgds.marine.usgs.gov/fan_info.php?fan=2002-031-FA
Abstract:
Bear Lake is a tectonic lake that has existed for at
least several hundred thousand years. The lake basin
is a relatively simple half graben, a spoon-shaped depression
tilted toward the main fault on the east side of the lake. The U.S.
Geological Survey, in cooperation with researchers from several
universities, has been studying the sediments of Bear Lake since
1996. The general purpose of this effort is to reconstruct past
limnological conditions and regional climate on a range of timescales,
from hundreds of years to hundreds of thousands of years. This research
relates to a variety of human concerns, including water usage in
the Bear River basin. Past work has included several coring operations,
a seismic-reflection survey, sediment-trap deployments, a barge-mounted
drilling operation with the GLAD800 drill rig, and a variety of
other studies.
The objectives of the September, 2002 operations, preliminarily
reported here, were (1) to compile a detailed bathymetric map of
the lake using swath-mapping techniques, in order to provide baseline
data for a variety of applications and studies, and (2) to complete
a sidescan-sonar survey of the lake, providing a nearly complete
acoustic image of the lake floor. Limited amounts of subbottom acoustic-reflection
data (CHIRP) were also collected, along with samples of lake-floor
sediments representative of different kinds of backscatter patterns.
These surveys followed an earlier subbottom acoustic-reflection
survey (1997), using boomer and 3.5 kHz systems (S. M. Colman, unpublished
data).
Purpose:
The chirp seismic-reflection data were used to look for evidence of sublacustrine spring discharge and to image possible fault scarps that cut the lake floor.
Supplemental_Information:
Theme:
Theme_Keyword_Thesaurus: USGS Metadata Identifier
Theme_Keyword: USGS:48a96e05-dbf6-44d0-ac9a-50d05560027b
Theme:
Theme_Keyword_Thesaurus: None
Theme_Keyword: seismic reflection
Theme_Keyword: SEG-Y
Theme_Keyword: Chirp
Theme_Keyword: SEG-Y
Theme_Keyword: U.S. Geological Survey
Theme_Keyword: USGS
Theme_Keyword: Coastal and Marine Geology Program
Theme_Keyword: CMGP
Theme_Keyword: Woods Hole Field Center
Theme:
Theme_Keyword_Thesaurus: ISO 19115 Topic Category
Theme_Keyword: inlandWaters
Theme_Keyword: geoscientificInformation
Theme:
Theme_Keyword_Thesaurus: USGS Thesaurus
Theme_Keyword: sub-bottom profiling
Theme_Keyword: geophysics
Place:
Place_Keyword_Thesaurus: None
Place_Keyword: Bear lake
Place_Keyword: Utah
Place_Keyword: Idaho
Place_Keyword: Western Lakes
Place_Keyword: North America
Place_Keyword: United States
The U.S. Geological Survey must be referenced as the originator of the dataset in any future publications.