Metadata:

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

Identification_Information:

Citation:

Citation_Information:

Originator: Eric Grossman

Originator: Patrick E. Hart

Originator: Michael E. Field

Originator: Peter Triezenberg

Publication_Date: 2006

Title:

High-resolution chirp seismic-reflection data acquired from theCap de Creus shelf and canyon area, Gulf of Lions, Spain in 2004

Series_Information:

Series_Name: U.S. Geological Survey Open-File Report

Issue_Identification: 2006-1247

Publication_Information:

Publication_Place: Menlo Park, CA

Publisher: U.S. Geological Survey

Online_Linkage: <http://pubs.usgs.gov/of/2006/1247/>

Geospatial_Data_Presentation_Form: seismic reflection profile section

Description:

Abstract:

This report consists of high-resolution chirp seismic reflection profiledata from the northern Gulf of Lions, Spain. These data were acquired in2004 using the Research Vessel Oceanus (USGS Cruise ID: O-1-04-MS). Thedata are available in binary and JPEG image formats. Binary data arein Society of Exploration Geologists (SEG) SEG-Y format and may bedownloaded for further processing or display. Reference maps andJPEG images of the profiles may be viewed with your Web browser.

Purpose:

Marine seismic reflection data are used to image and mapsedimentary and structural features of the seafloor and subsurface.These data were acquired across the shelf and canyon area of the Gulfof Lions, Spain as part of a multinational effort to characterize thegeologic framework and sedimentary environment of the region.The specific objective of this seismic survey is to provide seismicreflection images of the depositional geometry of the upper 50 meters ofsubbottom stratigraphy in order to better understand the mechanisms ofsediment transport and deposition. These chirp seismic profiles providehigh-quality images with approximately 20 cm of verticalresolution and up to 80 m of subbottom penetration.

Supplemental_Information:

Chirp seismic reflection profiles are acquired by means of anacoustic source and a hydrophone array, both contained in a single unittowed in the water behind a survey vessel. The sound source emits ashort (30 ms) swept-frequency (500 to 7200 Hz)acoustic pulse,which propagates through the water and sediment columns. The acousticenergy is reflected at density boundaries (such as the seafloor orsediment layers beneath the seafloor), and detected by the hydrophonearray, and digitally recorded by the onboard PC-based acquisition system.As the vessel moves, this process is repeated multiple times per second,producing a two-dimensional image of the shallow geologic structurebeneath the ship track.Additional information about the USGS survey O-1-04-MS is available at<http://walrus.wr.usgs.gov/infobank/o/o104ms/html/o-1-04-ms.meta.html>.

Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 20030925

Ending_Date: 20031001

Currentness_Reference:

Data assumed to be constant over time, but the imaged geology maychange due to geologic processes.

Status:

Progress: Complete

Maintenance_and_Update_Frequency: None planned

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: 3.1808

East_Bounding_Coordinate: 3.4586

North_Bounding_Coordinate: 42.4418

South_Bounding_Coordinate: 42.1763

Keywords:

Theme:

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: EuroSTRATAFORM

Theme_Keyword: Seismic Reflection

Theme_Keyword: Sedimentation

Theme:

Theme_Keyword_Thesaurus: ISO 19115 Topic Category

Theme_Keyword: geoscientificinformation

Theme_Keyword: imageryBaseMapsEarthCover

Theme_Keyword: oceans

Place:

Place_Keyword_Thesaurus: General

Place_Keyword: Cap de Creus Shelf

Place_Keyword: Cap de Creus Canyon

Place_Keyword: Gulf of Lions

Place_Keyword: Spain

Place:

Place_Keyword_Thesaurus: Geographic Names Information System (GNIS)

Place_Keyword: Mediterranean Sea

Access_Constraints: None. These data are held in the public domain.

Use_Constraints:

The U.S. Geological Survey requests to be acknowledged as the originatorof the data in future products or derivative research.

Point_of_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Eric Grossman

Contact_Organization: U.S. Geological Survey

Contact_Position: Geologist

Contact_Address:

Address_Type: mailing address

Address: 400 Natural Bridges Drive

City: Santa Cruz

State_or_Province: CA

Postal_Code: 95060-5792

Country: USA

Contact_Voice_Telephone: 831-427-4725

Contact_Electronic_Mail_Address: egrossman@usgs.gov

Browse_Graphic:

Browse_Graphic_File_Name:

<http://pubs.usgs.gov/of/2006/1247/images/gol_coverage_area.png>

Browse_Graphic_File_Description:

Map of Gulf of Lions showing areas of 2004 USGS chirp seismic refleciton research cruise

Browse_Graphic_File_Type: PNG

Cross_Reference:

Citation_Information:

Originator: Alonso, B.

Originator: Canals, M.

Originator: Got, H.

Originator: Maldonado, A.

Publication_Date: 1991

Title:

Sea valleys and related depositional systems in the Gulf ofLions and Ebro continental margin

Series_Information:

Series_Name: American Association of Petroleum Geologists Bulletin

Issue_Identification: 75, p. 1195-1214

Publication_Information:

Publication_Place: Tulsa, OK

Publisher: American Association of Petroleum Geologists

Cross_Reference:

Citation_Information:

Originator: Baztan, J.

Originator: Berné, S.,

Originator: Olivet, J.-L

Originator: Rabineau, M.

Originator: Aslanian, D.

Originator: Gaudin, M.

Originator: Réhault, J.P.

Originator: Canals, M.

Publication_Date: 2005

Title:

The axial incision: the key to understand canyon evolution (inthe western Gulf of Lions)

Series_Information:

Series_Name: Marine and Petroleum Geology

Issue_Identification: 22, n. 6-7, p. 805-826

Publication_Information:

Publication_Place: Guildford, Surrey, England

Publisher: Butterworth Scientific Ltd.

Cross_Reference:

Citation_Information:

Originator: Berné, S.

Originator: Carré, D.

Originator: Loubrieu, B.

Originator: Mazé, J.-P.

Originator: Normand, A.

Publication_Date: 2001

Title:

Carte morphobathymétrique du Golfe du Lion à l’ échelle 1/100 000 éme

Publication_Information:

Publication_Place: Brest, France

Publisher: Ifremer, Brest

Cross_Reference:

Citation_Information:

Originator: Berné, S.

Originator: Gorini, C.

Publication_Date: 2005

Title:

The Gulf of Lions: An overview of recent studies within theFrench Margins’ Programme

Series_Information:

Series_Name: Marine and Petroleum Geology

Issue_Identification: 22, n. 6-7, p. 691-693

Publication_Information:

Publication_Place: Guildford, Surrey, England

Publisher: Butterworth Scientific Ltd.

Cross_Reference:

Citation_Information:

Originator: Berné, S.

Originator: Carré, B.

Originator: Loubrieu, B.

Originator: Mazé, J.P.

Originator: Morvan, L.

Originator: Normand, A.

Publication_Date: 2004

Title: Le Golfe du Lion. Carte morpho-bathymétrique

Publication_Information:

Publication_Place: Brest, France

Publisher: Ifremer, Brest

Cross_Reference:

Citation_Information:

Originator: Berné, S.

Originator: Loubrieu, B.

Originator: The Calmar scientific party

Publication_Date: 1999

Title:

Canyons and recent sedimentary processes on the westernGulf of Lions margin

Series_Information:

Series_Name:

First results of the Calmar cruise. Comptes Rendus de l'Académie des Sciences de Paris

Issue_Identification: 328: 471-477

Publication_Information:

Publication_Place: Paris

Publisher: l'Académie des Sciences de Paris

Cross_Reference:

Citation_Information:

Originator: Berné, S.

Originator: Loubrieu, B.

Originator: l’équipe embarquée CALMAR

Publication_Date: 1997

Title:

Carte morpho-bathymetrie de la marge occidentale du Golfedu Lion à l’ échelle 1/250 000 éme

Publication_Information:

Publication_Place: Brest, France

Publisher: Ifremer, Brest

Cross_Reference:

Citation_Information:

Originator: Correggiari, A.

Originator: Trincardi, F.

Originator: Langone, L.

Originator: Roveri, M.

Publication_Date: 2001

Title:

Styles of failure in Late Holocene highstand prodeltawedges on the Adriatic shelf

Series_Information:

Series_Name: Journal of Sedimentary Geology

Issue_Identification: 71, p. 218-236

Publication_Information:

Publication_Place: Tulsa, OK

Publisher: SEPM (Society for Sedimentary Geology)

Cross_Reference:

Citation_Information:

Originator: Grossman, E.E.

Originator: Hart, P.

Originator: Field, M.E.

Publication_Date: 2005

Title:

Evidence of recent sediment storage and transportfrom shallow seismic stratigraphy on the Cap de Creus shelf, Spain

Series_Information:

Series_Name:

EuroSTRATAFORM - Promess Joint Meeting, Salamanca, Spain, October 24-27, 2005

Issue_Identification: October 24-27, 2005

Other_Citation_Details:

<http://www.soc.soton.ac.uk/CHD/EUROSTRATAFORM/salamanca2005/index.html>

Cross_Reference:

Citation_Information:

Originator: Lofi, J.

Originator: Rabineau, M.

Originator: Gorini, C.

Originator: Berne, S.

Originator: Clauzon, G.

Originator: De Clarens, P.

Originator: Tadeu Dos Reis, A.

Originator: Mountain, G.S.

Originator: Ryan, W.B.F.

Originator: Steckler, M.S.

Originator: Fouchet, C.

Publication_Date: 2003

Title:

Plio-Quaternary prograding clinoform wedges of thewestern Gulf of Lion continental margin (NW Mediterranean)after the Messinian Salinity Crisis

Series_Information:

Series_Name: Marine Geology

Issue_Identification: 198(3-4): 289-317

Publication_Information:

Publication_Place: Amsterdam

Publisher: Elsevier Scientific Pub. Co

Cross_Reference:

Citation_Information:

Originator: Marsset, T.

Originator: Bellec, V.

Publication_Date: 2002

Title:

Late Pleistocene-Holocene deposits on the Rhone innercontinental shelf (France): detailed mapping andcorrelation with previous continental and marine studies

Series_Information:

Series_Name: Sedimentology

Issue_Identification: 49, p. 255-276

Publication_Information:

Publication_Place: Blackwell Scientific Publishers

Publisher: Oxford, Boston

Cross_Reference:

Citation_Information:

Originator: Rabineau, M.

Originator: Berné, S.

Originator: Le Drezen, E.

Originator: Lericolais, G.

Originator: Rutunno, M.

Publication_Date: 1998

Title:

3D architecture of lowstand and transgressive Quaternarysand bodies on the outer shelf of the Gulf of Lions, France

Series_Information:

Series_Name: Marine Petroleum Geology

Issue_Identification: 15, p. 439-452

Publication_Information:

Publication_Place: Guildford, Surrey, England

Publisher: Butterworth Scientific Ltd.

Cross_Reference:

Citation_Information:

Originator: Rabineau, M.

Originator: Berné, S.

Originator: Aslanian, D.

Originator: Olivet, J.-L.

Originator: Phillipe, J.

Originator: Guillocheau, F.

Originator: Bourillet, J.-F.

Originator: Ledrezen, E.

Originator: Granjeon, D.

Publication_Date: 2005

Title:

Sedimentary sequences in the Gulf of Lions: a record of100,000 years climatic cycles

Series_Information:

Series_Name: Marine and Petroleum Geology

Issue_Identification: 22, n. 607, p. 775-804

Publication_Information:

Publication_Place: Guildford, Surrey, England

Publisher: Butterworth Scientific Ltd.

Cross_Reference:

Citation_Information:

Originator: Schoolmeester, T.

Originator: Grossman, E.E.

Originator: García-García, A.

Originator: Canals, M.

Originator: Field, M.

Originator: Levey, M.

Originator: Fabres, J.

Originator: Orange, D.

Publication_Date: 2005

Title:

Shallow Sediment Structure revealed from High ResolutionSurveys in the Upper Cap de Creus Canyon

Series_Information:

Series_Name:

EuroSTRATAFORM - Promess Joint Meeting, Salamanca, Spain, October 24-27, 2005

Issue_Identification: October 24-27, 2005

Other_Citation_Details:

<http://www.soc.soton.ac.uk/CHD/EUROSTRATAFORM/salamanca2005/index.html>

Cross_Reference:

Citation_Information:

Originator: Torres, J.

Originator: Savoye, B.

Originator: Cochonat, P.

Publication_Date: 1995

Title:

The effects of sea level changes on the Rhone slopesedimentation (northwestern Mediterranean) as indicated by seismic stratigraphy

Series_Information:

Series_Name: Journal of Sedimentary Research

Issue_Identification: 65, p. 368-38

Publication_Information:

Publication_Place: Tulsa, OK

Publisher: SEPM (Society for Sedimentary Geology)

Entity_and_Attribute_Information:

Overview_Description:

Entity_and_Attribute_Overview:

Binary data file: Each profile isavailable as a binary file in Society of Exploration GeophysicistsSEG-Y format. A SEG-Y file consists of 1) a 3200-byte fileidentification record of EBCDIC encoded general information; 2) a400-byte binary record with information such as sample rate andrecord length specific to the data set; and 3) multiple records, oneseismic reflection trace per record. Each trace record is precededby a 240-byte "trace header" containing information such as tracenumber and acquisition day and time specific to each trace. Thetrace data are represented as a time series of unitless 16-bitinteger or 32-bit real numbers proportional to the pressure recordedat each hydrophone. The SEG-Y file is useful only if you have accessto specialized software designed to process and display seismicreflection data.

Entity_and_Attribute_Detail_Citation:

Barry, K.M., Cavers, D.A., andKneale, C.W., 1975, Recommended standards for digital tape formats:Geophysics, v. 40, n. 2, p. 344 - 352. Also available online at:<http://www.seg.org/publications/tech-stand/>

Entity_and_Attribute_Overview:

Graphic image file: Each profile isavailable as a JPEG image.

Data_Quality_Information:

Attribute_Accuracy:

Attribute_Accuracy_Report:

The validity or accuracy of marine seismic reflection profiles ishighly qualitative, and depends on equipment and operating conditionvariables too numerous to quantify. There have been no efforts toassess the validity of the data.

Logical_Consistency_Report: These data have not been assessed for internal consistency.

Completeness_Report:

These are sparse line coverages (2D).Therefore, data are inherently incomplete. Geologic details betweenlines must be inferred. The surveys were not designed to cover aparticular geographic area; the line spacings and azimuths were chosento assess the regional stratigraphy.

Positional_Accuracy:

Horizontal_Positional_Accuracy:

Horizontal_Positional_Accuracy_Report:

Positions were determined withdifferential Global Positioning System (GPS). Absolute positionaccuracy was approximately plus/minus 10 m.

Vertical_Positional_Accuracy:

Vertical_Positional_Accuracy_Report:

The vertical position was local sea level and there have been nocorrections to a datum or for tidal variations.

Lineage:

Process_Step:

Process_Description:

Single-channel chirp seismic reflection data were acquired using anEdgetech 512i subbottom profiling system. This "fish " was towed aftof the research vessel at a depth of approximately 15 meters at aship speed of approximately 4 knots. A 30 ms swept-frequency(500 to 7200 Hz)"chirp" source signal was emitted 1 to 4 timesper second depending on water depth and the returning reflectionswere detected by hydrophones located along the bottom of the fish.The data were digitally recorded by an on-board PC-based Delph Seismicrecording system. Differential GPS position fixes were written intothe seismic data trace headers and are also available in an ASCIItext file.

Process_Date: 2004

Process_Step:

Process_Description:

Open File preparation: The seismic profiles were converted fromDelph Seimic proprietary format to standard SEG-Y format and toCGM plot files using Paradigm Focus software. Then the CGM files wereconverted to 300 dots per inch JPEG image file using Larson CGM toImage software. The SEG-Y data files and the JPEG image files areavailable for download from this on-line report.

Process_Date: 2004

Process_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Patrick E. Hart

Contact_Organization: U.S. Geological Survey

Contact_Position: Geophysicist

Contact_Address:

Address_Type: mailing address

Address: 345 Middlefield Road Mail Stop 999

City: Menlo Park

State_or_Province: CA

Postal_Code: 94025-3561

Country: USA

Contact_Voice_Telephone: 650-329-5160

Contact_Electronic_Mail_Address: hart@usgs.gov

Spatial_Data_Organization_Information:

Indirect_Spatial_Reference:

Horizontal X and Y locations for the seimic profiles location are providedin ASCII position files and are alos stored in the SEG-Y data trace headersin the standard header locations.

Spatial_Reference_Information:

Horizontal_Coordinate_System_Definition:

Geographic:

Latitude_Resolution: 0.00001

Longitude_Resolution: 0.00001

Geographic_Coordinate_Units: decimal degrees

Geodetic_Model:

Horizontal_Datum_Name: WGS 84

Ellipsoid_Name: WGS 84

Semi-major_Axis: 6378137 m

Denominator_of_Flattening_Ratio: 298.257

Distribution_Information:

Distributor:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Eric Grossman

Contact_Organization: U.S. Geological Survey

Contact_Position: Geologist

Contact_Address:

Address_Type: mailing address

Address: USGS, 400 Natural Bridges Drive

City: Santa Cruz

State_or_Province: CA

Postal_Code: 95060-5792

Country: USA

Contact_Voice_Telephone: 831-427-4725

Contact_Electronic_Mail_Address: egrossman@usgs.gov

Contact_Instructions:

Data may be available off-line only by specialarrangement with the distributor above. Please use the on-linedownload option unless precluded by download times or accessdifficulties.

Resource_Description: U.S. Geological Suvey Open-File Report 2006-1247

Distribution_Liability:

This dataset was prepared by an agency of theUnited States Government. Neither the United States Government nor anyagency thereof nor any of their employees, make any warranty, expressedor implied, or assumes any legal liability or responsibility forinformation, apparatus, products, or processes disclosed in thisreport, nor represents that its use would not infringe privately ownedrights. Reference herein to any specific commercial product, process,or service by trade name, trademark, manufacturer, or otherwise doesnot constitute or imply its endorsement, recommendation, or favoringby the United States Government or any agency thereof.Although all data published in this report have been used by the USGS,no warranty, expressed or implied, is made by the USGS as to theaccuracy of the data and related materials. The act of distributionshall not constitute any such warranty, and no responsibility isassumed by the USGS in the use of this data.

Standard_Order_Process:

Digital_Form:

Digital_Transfer_Information:

Format_Name: SEG-Y, JPEG, ASCII

Transfer_Size: 2.5 gigabytes

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name: <http://pubs.usgs.gov/of/2006/1247/>

Offline_Option:

Recording_Format: ISO 9660

Offline_Media: CD-R or DVD-R

Fees: none

Technical_Prerequisites:

Use of SEG-Y data requires specialized software,such as ProMax and Seisworks by Landmark Geophysical; FOCUS and SeisXby Paradigm Geophysical; SPW by Parallel Geoscience; or VISTA bySeismic Image Software.

Metadata_Reference_Information:

Metadata_Date: 20060728

Metadata_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Eric Grossman

Contact_Organization: U.S. Geological Survey

Contact_Position: Geologist

Contact_Address:

Address_Type: mailing address

Address: USGS, 400 Natural Bridges Drive

City: Santa Cruz

State_or_Province: CA

Postal_Code: 95060-5792

Country: USA

Contact_Voice_Telephone: 831-427-4725

Contact_Electronic_Mail_Address: egrossman@usgs.gov

Metadata_Standard_Name: Content Standard for Digital Geospatial Metadata

Metadata_Standard_Version: FGDC-STD-001-1998