Dataset Identification:
Resource Abstract:
- description: 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 (chrip) 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using boomer and 3.5 kHz systems (S. M. Colman, unpublished data).; abstract: Bear Lake is a tectonic lake that has existed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 (chrip) 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).
Citation
- Title Geophysical Surveys of Bear Lake, Utah-Idaho, September, 2002 - Bathymetry (5m contours).
-
- creation Date
2018-05-21T10:54:34.568517
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Metadata data stamp:
2018-08-06T23:04:09Z
Resource Maintenance Information
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- notes: This metadata record was generated by an xslt transformation from a dc metadata record; Transform by Stephen M. Richard, based
on a transform by Damian Ulbricht. Run on 2018-08-06T23:04:09Z
Metadata contact
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pointOfContact
- organisation Name
CINERGI Metadata catalog
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- Contact information
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- Address
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- electronic Mail Address cinergi@sdsc.edu
Metadata language
eng
Metadata character set encoding:
utf8
Metadata standard for this record:
ISO 19139 Geographic Information - Metadata - Implementation Specification
standard version:
2007
Metadata record identifier:
urn:dciso:metadataabout:644a2dcd-b32c-4779-baab-41f78bd8e713
Metadata record format is ISO19139 XML (MD_Metadata)