Jane F. Denny
Unpublished material
SEG-Y format chirp seismic data from geophysical surveys of Bear Lake, Utah-Idaho, 2002
raster
Woods Hole Coastal and Marine Science Center, Woods Hole, MA
U.S. Geological Survey, Coastal and Marine Geology Program
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.
https://cmgds.marine.usgs.gov/fan_info.php?fan=2002-031-FA
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survey (1997), using boomer and 3.5 kHz systems (S. M. Colman, unpublished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).
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.
For more information on the seismic surveys see https://cmgds.marine.usgs.gov/fan_info.php?fan=2002-031-FA. These data are also available via GeoMapApp (http://www.geomapapp.org/) and Virtual Ocean ( http://www.virtualocean.org/) earth science exploration and visualization applications.
The JPEG format of these data (along with other data associated with this field activity) were released through the Open-File Report 2003-150 (https://pubs.usgs.gov/of/2003/of03-150/). See the cross-reference for full citation information.
20020904
20020916
Publication Date
None planned
-111.5
-111.17
42.2
41.08
USGS Metadata Identifier
USGS:48a96e05-dbf6-44d0-ac9a-50d05560027b
None
seismic reflection
SEG-Y
Chirp
SEG-Y
U.S. Geological Survey
USGS
Coastal and Marine Geology Program
CMGP
Woods Hole Field Center
ISO 19115 Topic Category
inlandWaters
geoscientificInformation
USGS Thesaurus
sub-bottom profiling
geophysics
None
Bear lake
Utah
Idaho
Western Lakes
North America
United States
None
The U.S. Geological Survey must be referenced as the originator of the dataset in any future publications.
Jane F. Denny
U.S. Geological Survey
Geologist
mailing and physical address
384 Woods Hole Road
Woods Hole
MA
02543
USA
508-457-2311
508-457-2310
jdenny@usgs.gov
Joint Photographic Experts Group (JPEG) Image format
Jane F. Denny
Steve M. Colman
2003
Geophysical Surveys of Bear Lake, Utah-Idaho, September 2002
Open-File Report
03-150
Reston, VA
U.S. Geological Survey
https://pubs.usgs.gov/of/2003/of03-150/
Processed seismic data were converted to JPG format for ease of file display.
Quality control was conducted during processing.
Complete
WAAS (Wide Area Augmentation System) is assumed to be accurate within 1-2 meters.
Standard GPS is assumed accurate within 5-10 meters. All WAAS data are referenced
to WGS84. The data were acquired with an Edgetech 424 kHz CHIRP sub-bottom profiler.
The system was towed at the surface, close to the survey vessel.
Horizontal accuracy is thus assumed to be within +/-3 meters.
Raw SEGY-Y data were processed utilizing Colorado School of Mines Seismic Unix (SU)
seimsic processing software. The seismic data were recorded with TEI Delph Seismics
acquisition software. Durinr processing, the SEG-Y data were converted to SU format.
Gains were applied to the data to reduce noise and enhance the data. 'Mute' was used
to remove all noise/signals within the water column. The data were then converted to
postscript and JPG formats.
20020916
Jane F. Denny
US Geological Survey
Geologist
mailing and physical address
384 Woods Hole Road
Woods Hole
MA
02543
USA
508-457-2311
508-457-2310
jdenny@usgs.gov
Edits to the metadata were made to fix any errors that MP v 2.9.36 flagged. This is necessary to enable the metadata to be successfully harvested for various data catalogs. In some cases, this meant adding text "Information unavailable" or "Information unavailable from original metadata" for those required fields that were left blank. Other minor edits were probably performed (title, publisher, publication place, etc.). The larger work citation in the identification section was added. Added the online link to the zipped data file in the Identification_Information section. Added ISO 19115 Topic Category keywords. Modified the Distribution section to include the format and the link to the data. The metadata date (but not the metadata creator) was edited to reflect the date of these changes. The metadata available from a harvester may supersede metadata bundled within a download file. Compare the metadata dates to determine which metadata file is most recent.
20170228
U.S. Geological Survey
VeeAnn A. Cross
Marine Geologist
Mailing and Physical
384 Woods Hole Road
Woods Hole
MA
02543-1598
508-548-8700 x2251
508-457-2310
vatnipp@usgs.gov
This metadata record was modified from one describing JPEG images to reflect the SEG-Y version of the same data (Open-File Report 2003-150, https://pubs.usgs.gov/of/2003/of03-150/). Changes were made to the Citation and Distribution_Information.
20171121
U.S. Geological Survey
VeeAnn A. Cross
Marine Geologist
Mailing and Physical
384 Woods Hole Road
Woods Hole
MA
02543-1598
508-548-8700 x2251
508-457-2310
vatnipp@usgs.gov
USGS Thesaurus keywords added to the keyword section.
20180720
U.S. Geological Survey
VeeAnn A. Cross
Marine Geologist
Mailing and Physical
384 Woods Hole Road
Woods Hole
MA
02543-1598
508-548-8700 x2251
508-457-2310
vatnipp@usgs.gov
Added keywords section with USGS persistent identifier as theme keyword.
20200908
U.S. Geological Survey
VeeAnn A. Cross
Marine Geologist
Mailing and Physical
384 Woods Hole Road
Woods Hole
MA
02543-1598
508-548-8700 x2251
508-457-2310
vatnipp@usgs.gov
Raster
pixel
Jane F. Denny
US Geological Survey
Geologist
mailing and physical address
384 Woods Hole Road
Woods Hole
MA
02543
USA
508-457-2311
508-457-2310
jdenny@usgs.gov
This publication was prepared by an agency of the United
States Government. Neither the United States Government
nor any agency thereof, nor any of their employees, make
any warranty, expressed or implied, or assumes any legal
liability or responsibility information, apparatus, product, or
process disclosed in this report, or represents that its use
would not infringe privately owned rights. Reference
therein to any specific commercial product, process, or
service by trade name, trademark, manufacturer, or
otherwise does not necessarily constitute or imply its
endorsement, recommendation, or favoring by the United
States Government or any agency thereof. Any views and
opinions of authors expressed herein do not necessarily
state or reflect those of the United States Government or
any agency thereof. Although all data published on this
CD-ROM have been used by the USGS, no warranty,
expressed or implied, is made by the USGS as to the
accuracy of the data and related materials and/or the
functioning of the software. The act of distribution shall not
constitute any such warranty, and no responsibility is
assumed by the USGS in the use of this data, software, or
related materials.
SEG-Y
Link is to a folder containing SEG-Y files.
https://cmgds.marine.usgs.gov/data/2002_031_FA/
The online link gives access to the folder containing the individual SEG-Y files.
none
20200908
Jane F. Denny
US Geological Survey
Geologist
mailing and physical address
384 Woods Hole Road
Woods Hole
MA
02543
USA
508-457-2311
508-457-2310
jdenny@usgs.gov
FGDC Content Standards for Digital Geospatial Metadata
FGDC-STD-001-1998
None
None