Geophysical Surveys of Bear Lake, Utah-Idaho, September 2002 - Grab Sample Data

Metadata:

• Identification_Information
• Data_Quality_Information
• Spatial_Data_Organization_Information
• Spatial_Reference_Information
• Entity_and_Attribute_Information
• Distribution_Information
• Metadata_Reference_Information

Identification_Information:

Citation:

Citation_Information:

Originator: U.S. Geological Survey

Publication_Date: 2003

Title:

Geophysical Surveys of Bear Lake, Utah-Idaho, September 2002 - Grab Sample Data

Geospatial_Data_Presentation_Form: tabular digital data

Description:

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followed an earlier subbottom acoustic-reflection survey (1997), using boomer and 3.5 kHz systems (S. M. Colman, unpublished data).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:

Sediment samples were collected in order to ground-truth the sidescan-sonar data. Differing backscatter regimes were selected to sample in order to map their surficial sediment character.

Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 20020915

Ending_Date: 20020916

Currentness_Reference: Ground Condition

Status:

Progress: Complete

Maintenance_and_Update_Frequency: none planned

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -111.5

East_Bounding_Coordinate: -111.17

North_Bounding_Coordinate: 42.2

South_Bounding_Coordinate: 41.08

Keywords:

Theme:

Theme_Keyword_Thesaurus: none

Theme_Keyword: Sediment

Theme_Keyword: grab sample

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

Place:

Place_Keyword_Thesaurus: none

Place_Keyword: Bear Lake

Place_Keyword: Utah

Place_Keyword: Idaho

Place_Keyword: North America

Place_Keyword: United States

Access_Constraints: None.

Use_Constraints: The USGS asks to be referenced in any use of these data.

Point_of_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: U.S. Geological Survey

Contact_Person: Jane F. Denny

Contact_Position: Geologist, Seafloor Mapping Group

Contact_Address:

Address_Type: mailing and physical address

Address: 384 Woods Hole Road

City: Woods Hole

State_or_Province: MA

Postal_Code: 012543

Country: USA

Contact_Voice_Telephone: 508-457-2311

Contact_Facsimile_Telephone: 508-457-2310

Contact_Electronic_Mail_Address: jdenny@usgs.gov

Hours_of_Service: Monday-Friday, 8am-5pm, Eastern Standard Time

Data_Quality_Information:

Attribute_Accuracy:

Attribute_Accuracy_Report:

Positions are accurate within +/- 3 meters (recorded WAAS horizontal accuracy).

Logical_Consistency_Report:

These data were all acquired with a Van Veen Grab Sample off of the same platform. These data were collected within two days.

Completeness_Report: These data are known to be complete.

Positional_Accuracy:

Horizontal_Positional_Accuracy:

Horizontal_Positional_Accuracy_Report:

WAAS is assumed to be accurate within 1-2 meters. Standard GPS is assumed accurate within 5-10 meters. All data were recorded using the WAAS (Wide Area Augmentation System) navigation. All WAAS data are referenced to WGS84 datum. All sample locations are assumed to be accurate to +/- 3 meters.

Lineage:

Process_Step:

Process_Description:

The samples were acquired with a Van Veen grab sampler. The position of each location was recorded using Coastal Oceanographics, Inc HYPACK Max. Latitude and Longitude values were converted to eastings and northings using USGS Mapgen PROJ command (UTM Zone 12, WGS84 Ellipsoid). The location file, listing longitude, latitude, eastings, northings, water depth at sample location, time, date and sample id, was then formated as an ArcView table. The table was imported into ArcView. A shapefile was generated from the table.

Process_Date: 2003

Process_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Jane F. Denny

Contact_Organization: U.S. Geological Survey

Contact_Position: Geologist

Contact_Address:

Address_Type: mailing and physical address

Address: 384 Woods Hole Road

City: Woods Hole

State_or_Province: MA

Postal_Code: 02543

Country: USA

Contact_Voice_Telephone: 508-457-2311

Contact_Facsimile_Telephone: 508-457-2310

Contact_Electronic_Mail_Address: jdenny@usgs.gov

Spatial_Data_Organization_Information:

Direct_Spatial_Reference_Method: Vector

Point_and_Vector_Object_Information:

SDTS_Terms_Description:

SDTS_Point_and_Vector_Object_Type: point

Spatial_Reference_Information:

Horizontal_Coordinate_System_Definition:

Geographic:

Latitude_Resolution: 0.000089992

Longitude_Resolution: 0.000089992

Geographic_Coordinate_Units: Decimal degrees

Geodetic_Model:

Horizontal_Datum_Name: WGS84

Ellipsoid_Name: WGS84

Semi-major_Axis: 6378137.0000000

Denominator_of_Flattening_Ratio: 298.26

Entity_and_Attribute_Information:

Detailed_Description:

Entity_Type:

Entity_Type_Label: sample.shp

Entity_Type_Definition: Arcview shapefile

Entity_Type_Definition_Source: ESRI

Attribute:

Attribute_Label: Shape

Attribute_Definition: Feature geometry.

Attribute_Definition_Source: ESRI

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: point

Enumerated_Domain_Value_Definition: feature geometry name

Enumerated_Domain_Value_Definition_Source: Arcview

Attribute:

Attribute_Label: Longitude

Attribute_Definition: x coordinate of feature

Attribute_Definition_Source: ESRI

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: -111.5

Range_Domain_Maximum: -111.17

Attribute_Units_of_Measure: decimal degrees

Attribute:

Attribute_Label: Latitude

Attribute_Definition: location of y coordinate

Attribute_Definition_Source: ESRI

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 42.2

Range_Domain_Maximum: 41

Attribute_Units_of_Measure: decimal degrees

Attribute:

Attribute_Label: Easting

Attribute_Definition: location of X coordinate in UTM space

Attribute_Definition_Source: ESRI

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 450000

Range_Domain_Maximum: 490000

Attribute_Units_of_Measure: meters

Attribute:

Attribute_Label: Northing

Attribute_Definition: location of Y coordinate in UTM space

Attribute_Definition_Source: ESRI

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 4500000

Range_Domain_Maximum: 4700000

Attribute_Units_of_Measure: meters

Attribute:

Attribute_Label: Depth

Attribute_Definition: Water depth at sample location

Attribute_Definition_Source: Fathometer

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 5 meters

Range_Domain_Maximum: 65 meters

Attribute:

Attribute_Label: Time

Attribute_Definition: Time the sample was collected

Attribute_Definition_Source: USGS

Attribute_Domain_Values:

Unrepresentable_Domain: time

Attribute:

Attribute_Label: Date

Attribute_Definition: Date sample was collected

Attribute_Definition_Source: Calendar Date

Attribute_Domain_Values:

Unrepresentable_Domain: Date

Attribute:

Attribute_Label: Sample

Attribute_Definition: Sample Identification

Attribute_Definition_Source: USGS

Attribute_Domain_Values:

Codeset_Domain:

Codeset_Name: Sample ID

Codeset_Source: USGS

Distribution_Information:

Distributor:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Jane F. Denny

Contact_Organization: U.S. Geological Survey

Contact_Position: Geologist

Contact_Address:

Address_Type: mailing and physical address

Address: 384 Woods Hole Road

City: Woods Hole

State_or_Province: MA

Postal_Code: 02543

Country: USA

Contact_Voice_Telephone: 508-457-2311

Contact_Facsimile_Telephone: 508-457-2310

Contact_Electronic_Mail_Address: jdenny@usgs.gov

Resource_Description: JPG Images of Grab Samples

Distribution_Liability:

Altough this data set and its lineage have been used by the USGS, no warranty, expressed or implied, is made by the USGS as to the accuracy of the data and/or it's related materials. The act of distribution shall not constitute any such warranty, and no resposibility is assumed by the USGS in the use of these data or related items. Users must assume resposibility for the proper use of this data. This data should not be used at resolutions for which it is not intended. This data has no been reviewed for conformity with U.S. Geological Survey editorial standards, or the North American Strigraphic code. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the US Government.

Metadata_Reference_Information:

Metadata_Date: 20030425

Metadata_Review_Date: 2003

Metadata_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Jane F. Denny

Contact_Organization: U.S. Geological Survey

Contact_Position: Geologist

Contact_Address:

Address_Type: mailing and physical address

Address: 384 Woods Hole Road

City: Woods Hole

State_or_Province: MA

Postal_Code: 02543

Country: USA

Contact_Voice_Telephone: 508-457-2311

Contact_Facsimile_Telephone: 508-457-2310

Contact_Electronic_Mail_Address: jdenny@usgs.gov

Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata

Metadata_Standard_Version: FGDC-STD-001-1998

Metadata_Access_Constraints: None

Metadata_Use_Constraints: None