SEG-Y formatted chirp seismic-reflection profile data collected in the Indian River Bay, Delaware, on April 13, 2010, on U.S. Geological Survey Field Activity 2010-006-FA
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Metadata:
- Identification_Information:
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- Citation:
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- Citation_Information:
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- Originator: John F. Bratton
- Originator: Emile Bergeron
- Publication_Date: 2014
- Title:
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SEG-Y formatted chirp seismic-reflection profile data collected in the Indian River Bay, Delaware, on April 13, 2010, on U.S. Geological Survey Field Activity 2010-006-FA
- Edition: 1
- Series_Information:
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- Series_Name: Open-File Report
- Issue_Identification: 2011-1039
- Publication_Information:
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- Publication_Place: Woods Hole Coastal and Marine Science Center, Woods Hole, MA
- Publisher: U.S. Geological Survey, Coastal and Marine Geology Program
- Online_Linkage:
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<http://pubs.usgs.gov/of/2011/1039/data/seismics/seismic_segymeta.zip>
- Online_Linkage: <http://pubs.usgs.gov/of/2011/1039/data/seismics/segy/>
- Online_Linkage:
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<http://pubs.usgs.gov/of/2011/1039/html/ofr2011-1039-catalog.html>
- Larger_Work_Citation:
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- Citation_Information:
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- Originator: V.A. Cross
- Originator: J.F. Bratton
- Originator: H.A. Michael
- Originator: K.D. Kroeger
- Originator: A. Green
- Originator: E. Bergeron
- Publication_Date: 2014
- Title:
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Continuous Resistivity Profiling and Seismic-Reflection Data Collected in April 2010 from Indian River Bay, Delaware
- Edition: 1
- Series_Information:
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- Series_Name: Open-File Report
- Issue_Identification: 2011-1039
- Publication_Information:
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- Publication_Place: Reston, VA
- Publisher: U.S. Geological Survey
- Online_Linkage: <http://pubs.usgs.gov/of/2011/1039/>
- Online_Linkage: <http://dx.doi.org/10.3133/ofr20111039>
- Description:
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- Abstract:
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A geophysical survey to delineate the fresh-saline groundwater interface and associated sub-bottom sedimentary structures beneath Indian River Bay, Delaware, was carried out in April 2010. This included surveying at higher spatial resolution in the vicinity of a study site at Holts Landing, where intensive onshore and offshore studies were subsequently completed. The total length of continuous resistivity profiling (CRP) survey lines was 145 kilometers (km), with 36 km of chirp seismic lines surveyed around the perimeter of the bay. Medium-resolution CRP surveying was performed using a 50-meter streamer in a bay-wide grid. Results of the surveying and data inversion showed the presence of many buried paleochannels beneath Indian River Bay that generally extended perpendicular from the shoreline in areas of modern tributaries, tidal creeks, and marshes. An especially wide and deep paleochannel system was imaged in the southeastern part of the bay near White Creek. Many paleochannels also had high-resistivity anomalies corresponding to low-salinity groundwater plumes associated with them, likely due to the presence of fine-grained estuarine mud and peats in the channel fills that act as submarine confining units. Where present, these units allow plumes of low-salinity groundwater that was recharged onshore to move beyond the shoreline, creating a complex fresh-saline groundwater interface in the subsurface. The properties of this interface are important considerations in construction of accurate coastal groundwater flow models. These models are required to help predict how nutrient-rich groundwater, recharged in agricultural watersheds such as this one, makes its way into coastal bays and impacts surface water quality and estuarine ecosystems. For more information on the survey conducted for this project, see <http://woodshole.er.usgs.gov/operations/ia/public_ds_info.php?fa=2010-006-FA>.
- Purpose:
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To provide the digital chirp seismic-reflection profile data in SEG-Y format which provides information about the sub-surface geology in the survey area as well as being able to be used in conjunction with the continuous resistivity profile (CRP) data.
- Time_Period_of_Content:
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- Time_Period_Information:
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- Single_Date/Time:
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- Calendar_Date: 20100413
- Currentness_Reference: ground condition
- Status:
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- Progress: Complete
- Maintenance_and_Update_Frequency: None planned
- Spatial_Domain:
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- Bounding_Coordinates:
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- West_Bounding_Coordinate: -75.202086
- East_Bounding_Coordinate: -75.062936
- North_Bounding_Coordinate: 38.618986
- South_Bounding_Coordinate: 38.569244
- Keywords:
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- Theme:
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- Theme_Keyword_Thesaurus: General
- Theme_Keyword: U.S. Geological Survey
- Theme_Keyword: USGS
- Theme_Keyword: Coastal and Marine Geology Program
- Theme_Keyword: CMGP
- Theme_Keyword: Woods Hole Coastal and Marine Science Center
- Theme_Keyword: WHCMSC
- Theme_Keyword: Field Activity Number 2010-006-FA
- Theme_Keyword: Info Bank ID K-6-10-DL
- Theme_Keyword: navigation
- Theme_Keyword: R/V Knob
- Theme_Keyword: Lowrance GPS
- Theme_Keyword: seismic-reflection profile
- Theme_Keyword: SEG-Y
- Theme_Keyword: EdgeTech 424
- Theme_Keyword: Chirp seismics
- Theme_Keyword: Open-file Report 2011-1039
- Theme:
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- Theme_Keyword_Thesaurus: ISO 19115 Topic Category
- Theme_Keyword: location
- Theme_Keyword: oceans
- Theme_Keyword: oceans and estuaries
- Theme_Keyword: oceans and coastal
- Theme_Keyword: geoscientificInformation
- Place:
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- Place_Keyword_Thesaurus: General
- Place_Keyword: North America
- Place_Keyword: North Atlantic Ocean
- Place_Keyword: United States
- Place_Keyword: Delaware
- Place_Keyword: Indian River Bay
- Place_Keyword: Indian River Inlet
- Place_Keyword: Holts Landing
- Place_Keyword: Piney Neck
- Place_Keyword: Rosedale Beach
- Access_Constraints: None.
- Use_Constraints:
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The public domain data from the U.S. Government are freely redistributable with proper metadata and source attribution. Please recognize the U.S. Geological Survey as the originator of the dataset.
- Point_of_Contact:
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- Contact_Information:
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- Contact_Person_Primary:
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- Contact_Person: VeeAnn A. Cross
- Contact_Organization: U.S. Geological Survey
- Contact_Position: Marine Geologist
- Contact_Address:
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- Address_Type: mailing and physical address
- Address: Woods Hole Coastal and Marine Science Center
- Address: 384 Woods Hole Rd.
- City: Woods Hole
- State_or_Province: MA
- Postal_Code: 02543-1598
- Contact_Voice_Telephone: (508) 548-8700 x2251
- Contact_Facsimile_Telephone: (508) 457-2310
- Contact_Electronic_Mail_Address: vatnipp@usgs.gov
- Native_Data_Set_Environment:
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Microsoft Windows Vista Version 6.1 (Build 7601) Service Pack 1; ESRI ArcCatalog 9.3.1.4095
- Cross_Reference:
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- Citation_Information:
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- Originator: Michael W. Norris
- Originator: Alan K. Faichney
- Publication_Date: 2002
- Title: SEG Y rev1 Data Exchange Format
- Publication_Information:
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- Publication_Place: Tulsa, OK
- Publisher: Society of Exploration Geophysicists
- Online_Linkage: <http://www.seg.org/documents/10161/77915/seg_y_rev1.pdf>
- Cross_Reference:
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- Citation_Information:
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- Originator: J.W. Stockwell Jr.
- Originator: J.K. Cohen
- Publication_Date: 2008
- Title: The New SU User's Manual (version 4.0)
- Publication_Information:
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- Publication_Place: Golden, CO
- Publisher: Center for Wave Phenomena - Colorado School of Mines
- Online_Linkage: <http://www.cwp.mines.edu/cwpcodes/>
- Data_Quality_Information:
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- Completeness_Report:
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A SEG-Y format data file is available for every seismic-reflection profile line collected on this cruise.
- Positional_Accuracy:
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- Horizontal_Positional_Accuracy:
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- Horizontal_Positional_Accuracy_Report:
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The navigation system used was a Lowrance 480M with an LGC-2000 Global Positioning System (GPS) antenna. The antenna was located above the seismic towfish tow point. The system towfish was attached by a short line to a cleat on a 2 x 6 board that was clamped across the bow of the boat. The towfish was on the starboard side of the boat, approximately 0.5 meters below the water surface. GPS data are assumed to be accurate to within 10 meters.
- Vertical_Positional_Accuracy:
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- Vertical_Positional_Accuracy_Report:
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Although bathymetry was not recorded directly with this system, bathymetry can be derived by tracing the seafloor reflector in the seismic-reflection profiles. The seismic towfish was attached to a cleat by a short line on the starboard side of the boat. The transducer draft was approximately 0.5 m below the water surface. The draft offset was not included in the data acquisition.
- Lineage:
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- Source_Information:
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- Source_Contribution:
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The seismic acquisition system used on this cruise was an EdgeTech 424 Chirp sub-bottom system with a 4 to 24 kHz pulse bandwidth and a 2 ms pulse. The system towfish was attached by a short line to a cleat on a 2 x 6 board that was clamped across the bow of the boat. The towfish was on the starboard side of the boat, approximately 0.5 meters below the water surface. The acquisition software used to record the data was Discover 3100 version 7.01. The data were recorded in the SEG-Y data format IBM floating point with navigation supplied by the Lowrance GPS system. The navigation was recorded in the header of the seismic data in an arc second format. The record length is 133 ms, with a sample interval of 23 micro-seconds and 5788 samples per trace. The fire-rate was between 4 and 6 shots per second. The GPS antenna was located above the tow position of the seismic transducer.
- Process_Step:
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- Process_Description:
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The chirp seismic data were recorded in SEG-Y format IBM floating point. These data files were transferred from the acquisition computer to the processing computer via a network connection.
- Process_Date: 201005
- Process_Contact:
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- Contact_Information:
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- Contact_Person_Primary:
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- Contact_Person: VeeAnn A. Cross
- Contact_Organization: U.S. Geological Survey
- Contact_Position: Marine Geologist
- Contact_Address:
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- Address_Type: mailing and physical address
- Address: Woods Hole Coastal and Marine Science Center
- Address: 384 Woods Hole Rd.
- City: Woods Hole
- State_or_Province: MA
- Postal_Code: 02543-1598
- Contact_Voice_Telephone: (508) 548-8700 x2251
- Contact_Facsimile_Telephone: (508) 457-2310
- Contact_Electronic_Mail_Address: vatnipp@usgs.gov
- Distribution_Information:
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- Distributor:
-
- Contact_Information:
-
- Contact_Person_Primary:
-
- Contact_Person: VeeAnn A. Cross
- Contact_Organization: U.S. Geological Survey
- Contact_Position: Marine Geologist
- Contact_Address:
-
- Address_Type: mailing and physical address
- Address: Woods Hole Coastal and Marine Science Center
- Address: 384 Woods Hole Rd.
- City: Woods Hole
- State_or_Province: MA
- Postal_Code: 02543-1598
- Contact_Voice_Telephone: (508) 548-8700 x2251
- Contact_Facsimile_Telephone: (508) 457-2310
- Contact_Electronic_Mail_Address: vatnipp@usgs.gov
- Resource_Description: Downloadable Data
- Distribution_Liability:
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Neither the U.S. government, the Department of the Interior, nor the USGS, nor any of their employees, contractors, or subcontractors, make any warranty, express or implied, nor assume any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, nor represent that its use would not infringe on privately owned rights. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the USGS in the use of these data or related materials. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government.
- Standard_Order_Process:
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- Digital_Form:
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- Digital_Transfer_Information:
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- Format_Name: SEGY
- Format_Specification:
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These data are available in zip compressed files of SEG-Y formatted data. The transfer file size is dependant on the seismic line being transferred. Additionally, the FGDC compliant metadata is available in a separate zip file.
- Transfer_Size: 178 MB
- Digital_Transfer_Option:
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- Online_Option:
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- Computer_Contact_Information:
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- Network_Address:
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- Network_Resource_Name:
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<http://pubs.usgs.gov/of/2011/1039/data/seismics/seismic_segymeta.zip>
- Network_Resource_Name: <http://pubs.usgs.gov/of/2011/1039/data/seismics/segy/>
- Network_Resource_Name:
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<http://pubs.usgs.gov/of/2011/1039/html/ofr2011-1039-catalog.html>
- Network_Resource_Name: <http://dx.doi.org/10.3133/ofr20111039>
- Fees: None.
- Technical_Prerequisites:
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The data are available in the SEG-Y format. The user must have software capable of reading this format. The online linkage is to the folder containing the SEG-Y data. The separate zip file provides the FGDC metadata. Due to the large file sizes, the SEG-Y files are only available individually from a download folder. To further reduce filesize, these SEG-Y files have been compressed, so the user must have the capability of uncompressing a zip file.
- Metadata_Reference_Information:
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- Metadata_Date: 20140630
- Metadata_Contact:
-
- Contact_Information:
-
- Contact_Person_Primary:
-
- Contact_Person: VeeAnn A. Cross
- Contact_Organization: U.S. Geological Survey
- Contact_Position: Marine Geologist
- Contact_Address:
-
- Address_Type: mailing and physical address
- Address: Woods Hole Coastal and Marine Science Center
- Address: 384 Woods Hole Rd.
- City: Woods Hole
- State_or_Province: MA
- Postal_Code: 02543-1598
- Contact_Voice_Telephone: (508) 548-8700 x2251
- Contact_Facsimile_Telephone: (508) 457-2310
- Contact_Electronic_Mail_Address: vatnipp@usgs.gov
- Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata
- Metadata_Standard_Version: FGDC-STD-001-1998
- Metadata_Time_Convention: local time
- Metadata_Extensions:
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- Online_Linkage: <http://www.esri.com/metadata/esriprof80.html>
- Profile_Name: ESRI Metadata Profile
Generated by mp version 2.9.6 on Mon Jun 30 16:32:17 2014