Metadata: Identification_Information: Citation: Citation_Information: Originator: Jonathan R. Childs Originator: Patrick Hart Originator: Terry R. Bruns Originator: Michael S. Marlow Originator: Ray Sliter Publication_Date: 2000 Title: High-resolution marine seismic reflection data from the San Francisco Bay area, collected in 1994 during USGS Field Activity J2-94-SF Geospatial_Data_Presentation_Form: ASCII, gif, SEG-Y Series_Information: Series_Name: Open-File Report Issue_Identification: 2000-0494 Publication_Information: Publication_Place: Menlo Park, CA Publisher: U.S. Geological Survey Online_Linkage: https://doi.org/10.3133/ofr00494 Online_Linkage: http://pubs.usgs.gov/of/2000/0494/ Larger_Work_Citation: Citation_Information: Originator: Jonathan R. Childs Originator: Patrick Hart Originator: Terry R. Bruns Originator: Michael S. Marlow Originator: Ray Sliter Publication_Date: 2019 Title: High-resolution marine seismic reflection data from the San Francisco Bay area Series_Information: Series_Name: Open-File Report Issue_Identification: 2000-0494 Publication_Information: Publication_Place: Menlo Park, CA Publisher: U.S. Geological Survey Online_Linkage: https://doi.org/10.3133/ofr00494 Online_Linkage: http://pubs.usgs.gov/of/2000/0494/ Description: Abstract: Between 1993 and 1997, the U.S. Geological Survey acquired high-resolution, marine seismic-reflection profile data across submerged portions of known and inferred upper crustal fault zones throughout the greater San Francisco Bay area. This particular dataset was acquired in 1995 during USGS Field Activity J2-94-SF using the vessel David Johnson. The dataset includes navigational data in ASCII format, gif images of the seismic-profile lines, and seismic data in industry-standard SEG-Y format. These data are also available via GeoMapApp (http://www.geomapapp.org/) and Virtual Ocean (http://www.virtualocean.org/) earth science exploration and visualization applications. Purpose: Marine seismic reflection data are used to image and map sedimentary and structural features of the seafloor and subsurface. These data are useful in mapping faults (such as the San Andreas and Hayward Faults) where they pass under the waters of the San Francisco Bay, and in assessing other submarine geologic characteristics and features. Supplemental_Information: Additional information about the USGS field activity from which these data were collected may be found at: https://cmgds.marine.usgs.gov/fan_info.php?fan=J294SF Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. Although this Federal Geographic Data Committee-compliant metadata file is intended to document the dataset in nonproprietary form, as well as in Esri format, this metadata file may include some Esri-specific terminology. Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 19940504 Ending_Date: 19940526 Currentness_Reference: ground condition at time data were collected Status: Progress: Complete Maintenance_and_Update_Frequency: None planned Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -122.77 East_Bounding_Coordinate: -121.68 North_Bounding_Coordinate: 38.16 South_Bounding_Coordinate: 37.49 Keywords: Theme: Theme_Keyword_Thesaurus: USGS Metadata Identifier Theme_Keyword: USGS:d5af63d2-3e9c-42f8-bd24-b94a70e32b0f Theme: Theme_Keyword_Thesaurus: None Theme_Keyword: marine seismic reflection profile Theme_Keyword: SEG-Y data Theme_Keyword: G295SF Theme_Keyword: Robert Gray Theme_Keyword: U.S. Geological Survey Theme_Keyword: USGS Theme_Keyword: Coastal and Marine Hazards and Resources Program Theme_Keyword: CMHRP Theme_Keyword: Pacific Coastal and Marine Science Center Theme_Keyword: PCMSC Theme: Theme_Keyword_Thesaurus: Data Categories for Marine Planning Theme_Keyword: distributions Theme_Keyword: substrate Theme: Theme_Keyword_Thesaurus: ISO 19115 Topic Category Theme_Keyword: geoscientificInformation Theme: Theme_Keyword_Thesaurus: Marine Realms Information Bank (MRIB) keywords Theme_Keyword: seismic reflection profiling Theme_Keyword: marine geophysics Theme: Theme_Keyword_Thesaurus: USGS Thesaurus Theme_Keyword: seismic reflection methods Theme_Keyword: sub-bottom profiling Theme_Keyword: marine geophysics Place: Place_Keyword_Thesaurus: Geographic Names Information System (GNIS) Place_Keyword: San Francisco Bay Place_Keyword: San Pablo Bay Place_Keyword: San Andreas Fault Place_Keyword: State of California Place: Place_Keyword_Thesaurus: None Place_Keyword: Golden Gate Place_Keyword: Northern California Place_Keyword: Hayward Fault Access_Constraints: None Use_Constraints: USGS-authored or produced data and information are in the public domain from the U.S. Government and are freely redistributable with proper metadata and source attribution. Please recognize and acknowledge the U.S. Geological Survey as the originator(s) of the dataset and in products derived from these data. Point_of_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey, Pacific Coastal and Marine Science Center Contact_Person: PCMSC Science Data Coordinator Contact_Address: Address_Type: mailing and physical Address: 2885 Mission Street City: Santa Cruz State_or_Province: CA Postal_Code: 95060 Contact_Voice_Telephone: 831-427-4747 Contact_Electronic_Mail_Address: pcmsc_data@usgs.gov Data_Quality_Information: Logical_Consistency_Report: Unknown Completeness_Report: Dataset is considered complete for the information presented, as described in the abstract. Users are advised to read the accompanying Open-File Report carefully for additional details. Lineage: Process_Step: Process_Description: Seismic reflection profiles are acquired by means of an acoustic source (usually generated electromagnetically or with compressed air), and a hydrophone or hydrophone array. Both elements are typically towed in the water behind a survey vessel. The sound source emits a short acoustic pulse, which propagates through the water and sediment columns. The acoustic energy is reflected at density boundaries (such as the seafloor or sediment layers beneath the seafloor), and detected at the hydro-phone. This process is repeated at intervals ranging between 250 milliseconds and 10 seconds depending on the source type. Users are advised to read the Instrumentation and Data Processing sections of the accompanying Open-File Report for specifics to each data-collection cruise. Seismic data are stored in SEG-Y format, which is a standard digital format that can be read and manipulated by most seismic-processing software packages. The SEG-Y file format includes a 3200-byte descriptive header that should contain detailed information regarding the data acquisition and processing parameters. The navigation data are stored in flat ASCII files as latitude and longitude values that can be used to plot track maps of the seismic profiles at any scale or map projection desired. The data and format of the navigation files are described in the file prologue. Gif images of the seismic-reflection profiles are also available. Process_Date: 19991005 Process_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Jonathan R. Childs Contact_Organization: U.S. Geological Survey Contact_Position: geophysicist Contact_Address: Address_Type: mailing and physical address Address: Mail Stop 999 345 Middlefield Rd. City: Menlo Park State_or_Province: CA Postal_Code: 94025 Contact_Voice_Telephone: 650-329-5195 Contact_Electronic_Mail_Address: jchilds@usgs.gov Process_Step: Process_Description: Keywords section of metadata optimized for discovery in USGS Coastal and Marine Geology Data Catalog. Process_Date: 20170124 Process_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Person: Alan O. Allwardt Contact_Position: Contractor -- Information Specialist Contact_Address: Address_Type: mailing and physical address Address: 2885 Mission Street City: Santa Cruz State_or_Province: CA Postal_Code: 95060 Contact_Voice_Telephone: 831-460-7551 Contact_Facsimile_Telephone: 831-427-4748 Contact_Electronic_Mail_Address: aallwardt@usgs.gov Process_Step: Process_Description: Edits were made to bring the metadata up to current PCMSC standards including information about the accompanying Open-File Report, standardizing authors' names, adding a doi# link, correcting typos, refining keywords, and using current access and distribution liability statements. Point of Contact and Metadata Contact information sections were changed to static PCMSC contact information. No data were changed. Users are advised to compare the metadata date of this file to any similar file to ensure they are using the most recent version. Process_Date: 20200102 Process_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Susan A Cochran Contact_Organization: U.S. Geological Survey, Pacific Coastal and Marine Science Center Contact_Address: Address_Type: mailing and physical Address: 2885 Mission St. City: Santa Cruz State_or_Province: CA Postal_Code: 95060 Country: United States Contact_Voice_Telephone: 831-460-7545 Contact_Electronic_Mail_Address: scochran@usgs.gov Process_Step: Process_Description: Edited metadata to add keywords section with USGS persistent identifier as theme keyword. No data were changed. Process_Date: 20201019 Process_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Person: VeeAnn A. Cross Contact_Position: Marine Geologist Contact_Address: Address_Type: Mailing and Physical Address: 384 Woods Hole Road 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 Entity_and_Attribute_Information: Overview_Description: Entity_and_Attribute_Overview: Seismic-reflection data are available in SEG-Y format, which includes self-contained headers with attribute information; navigation data are available in ASCII format with header information; profiles are available in gif format. Entity_and_Attribute_Detail_Citation: Producer Distribution_Information: Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Person: Clint Steele Contact_Address: Address_Type: mailing and physical address Address: Mail Stop 999 345 Middlefield Rd. City: Menlo Park State_or_Province: CA Postal_Code: 94025 Contact_Voice_Telephone: 650-329-5055 Contact_Electronic_Mail_Address: csteele@usgs.gov Resource_Description: Downloadable SEG-Y data, navigation information in ASCII format, gif images of seismic-reflection profiles Distribution_Liability: Unless otherwise stated, all data, metadata and related materials are considered to satisfy the quality standards relative to the purpose for which the data were collected. Although these data and associated metadata have been reviewed for accuracy and completeness and approved for release by the U.S. Geological Survey (USGS), no warranty expressed or implied is made regarding the display or utility of the data on any other system or for general or scientific purposes, nor shall the act of distribution constitute any such warranty. Standard_Order_Process: Digital_Form: Digital_Transfer_Information: Format_Name: various File_Decompression_Technique: none Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: https://pubs.usgs.gov/of/2000/0494/#coverage Network_Resource_Name: https://pubs.usgs.gov/of/2000/0494/#segy Network_Resource_Name: https://pubs.usgs.gov/of/2000/0494/nav_meta/j294sf.ebc Network_Resource_Name: https://pubs.usgs.gov/of/2000/0494/nav_meta/j294sfhr.ebc Network_Resource_Name: https://pubs.usgs.gov/of/2000/0494/nav_meta/j294sf.txt Network_Resource_Name: https://pubs.usgs.gov/of/2000/0494/nav_meta/j294sfhr.txt Access_Instructions: Data can be downloaded using the Network_Resource_Name links. The first link takes the user to the section of the Open-File Report where the tracklines for all field activities can be seen in Figure 1. Figures 2 through 5 are zoomed in geographical areas that show the trackline numbers. The second link takes the user to the section of the Open-File Report where one can link to the digital SEG-Y data and profile images based on the geographical areas shown in Figures 2 through 5. The third link is for the header file of the SEG-Y high-resolution data and describes many of the parameters. The fourth link is for the header file of the SEG-Y very-high-resolution data and describes many of the parameters. The fifth and sixth links are for the navigational data for the high-resolution and very-high-resolution collections, respectively. Users are advised to read the Open-File Report completely. Fees: none Metadata_Reference_Information: Metadata_Date: 20201019 Metadata_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey, Pacific Coastal and Marine Science Center Contact_Person: PCMSC Science Data Coordinator Contact_Address: Address_Type: mailing and physical Address: 2885 Mission Street City: Santa Cruz State_or_Province: CA Postal_Code: 95060-5792 Country: US Contact_Voice_Telephone: 831-427-4747 Contact_Electronic_Mail_Address: pcmsc_data@usgs.gov Metadata_Standard_Name: Content Standard for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998