• What does this data set describe?
  1. How should this data set be cited?
  2. What geographic area does the data set cover?
  3. What does it look like?
  4. Does the data set describe conditions during a particular time period?
  5. What is the general form of this data set?
  6. How does the data set represent geographic features?
  7. How does the data set describe geographic features?
• Who produced the data set?
  1. Who are the originators of the data set?
  2. Who also contributed to the data set?
  3. To whom should users address questions about the data?
• Why was the data set created?
• How was the data set created?
  1. From what previous works were the data drawn?
  2. How were the data generated, processed, and modified?
  3. What similar or related data should the user be aware of?
• How reliable are the data; what problems remain in the data set?
  1. How well have the observations been checked?
  2. How accurate are the geographic locations?
  3. How accurate are the heights or depths?
  4. Where are the gaps in the data? What is missing?
  5. How consistent are the relationships among the data, including topology?
• How can someone get a copy of the data set?
  1. Are there legal restrictions on access or use of the data?
  2. Who distributes the data?
  3. What's the catalog number I need to order this data set?
  4. What legal disclaimers am I supposed to read?
  5. How can I download or order the data?
• Who wrote the metadata?

What does this data set describe?

1. How should this data set be cited?

   U.S. Geological Survey (USGS) <http://www.usgs.gov/>, Coastal and Marine Geology Program (CMGP) <http://marine.usgs.gov/>, 20130331, Geological and Geophysical data of field activity L-2-86-NC in Northern California from 07/17/1986 to 08/02/1986: U.S. Geological Survey (USGS) <http://www.usgs.gov>, Coastal and Marine Geology (CMG) <http://walrus.wr.usgs.gov>, Menlo Park, CA.

   Online Links:

   • <http://walrus.wr.usgs.gov/infobank/gos/l-2-86-nc.fmeta.xml>
   • <http://walrus.wr.usgs.gov/infobank/l/l286nc/html/l-2-86-nc.meta.html>

2. What geographic area does the data set cover?

   West_Bounding_Coordinate: -127.61261

   East_Bounding_Coordinate: -124.18832

   North_Bounding_Coordinate: 41.13013

   South_Bounding_Coordinate: 40.63187

3. What does it look like?

4. Does the data set describe conditions during a particular time period?

   Beginning_Date: 17-Jul-1986

   Ending_Date: 02-Aug-1986

   Currentness_Reference: ground condition

5. What is the general form of this data set?

6. How does the data set represent geographic features?
   1. How are geographic features stored in the data set?

      Indirect_Spatial_Reference: Northern California

      This is a Point data set. It contains the following vector data types (SDTS terminology):
      • Point

   2. What coordinate system is used to represent geographic features?

      Horizontal positions are specified in geographic coordinates, that is, latitude and longitude. Latitudes are given to the nearest 0.00001. Longitudes are given to the nearest 0.00001. Latitude and longitude values are specified in Decimal degrees.

      Vertical_Coordinate_System_Definition:

      Depth_System_Definition:

      Depth_Datum_Name: Local surface

      Depth_Resolution: 0.1

      Depth_Distance_Units: meters

      Depth_Encoding_Method: Attribute values

      
      
      

7. How does the data set describe geographic features?

   Entity_and_Attribute_Overview:

   Navigation with Time Stamp <http://walrus.wr.usgs.gov/infobank/programs/html/definition/nav.html>

Who produced the data set?

1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)
   • U.S. Geological Survey (USGS) <http://www.usgs.gov/>, Coastal and Marine Geology Program (CMGP) <http://marine.usgs.gov/>

2. Who also contributed to the data set?

   Al McClenaghan (Ship Captain); Andrew Carey (Biologist, Osu); Barbara Seekins (Watchstander); Bill Lafleur (Chief Engineer); Bill Normark (Chief Scientist); Charlaine Fleishman (Watchstander); Hank Chezar (Cameraman); Charlie Johnson (Unsp Investigatr, Navy); Chris Gutmacher (Navigator); Chris Poppe (Chief Mate); Chuck Gilbert (Navigator); Chuck Heywood (Navigator); Dave Hogg (Electronics Technician); Dave Stein (Biologist, OSU); Debby Tatman (Watchstander); Glenn James (Unspecified Investigator, Navy); Greg McMurray (Watchstander, DOGAMI); Jan Morton (Geophysicist); Jeff Stampfer (Mechanical Technician); Jim Dodge (Unspecified Investigator, Navy); Joe Craver (Unspecified Investigator, Navy); John Smith (Unspecified Investigator, MMS); Jon Erickson (Mechanical Technician); Kaye Kinoshita (Navigator); Kevin O'Toole (Mechanical Technician); Mark Holmes (Geophysicist); Mike Boyle (Electronics Technician); Mitch Lyle (Geologist, OSU); Randy Koski (Geologist); Rick Viall (Electronics Technician); Rob Zierenberg (Geologist); Russ Grocki (Unspecified Investigator, Navy); Stephanie Ross (Geophysicist); Terry Owen (Unspecified Investigator, Navy); Wendy Bohrson (Geologist)
   

3. To whom should users address questions about the data?
   U.S. Geological Survey (USGS) <http://www.usgs.gov>, Coastal and Marine Geology (CMG) <http://walrus.wr.usgs.gov>
   Attn: Clint Steele <http://walrus.wr.usgs.gov/staff/csteele.html>
   InfoBank Group Leader <http://walrus.wr.usgs.gov/staff/csteele.html>
   USGS, MailStop 999, 345 Middlefield Road
   Menlo Park, CA 94025-3561
   USA
   

   (650) 329-5055 (voice)
   (650) 329-5190 (FAX)
   infobank@octopus.wr.usgs.gov <mailto:infobank@octopus.wr.usgs.gov>
   

Why was the data set created?

These data and information are intended for science researchers, students from elementary through college, policy makers, and general public.

How was the data set created?

1. From what previous works were the data drawn?

2. How were the data generated, processed, and modified?

   Date: 19-Jan-1996 (process 1 of 1)

   Navigation Data

   Converted to time format with year at start.
   
   08/20/86 CLINT DUA0:[DATA.L286NC.N]L286NC.070;
   DRB0:[DRS.NAV]EOTCSSP.EXE;
   
   Input was...
   08/20/86 CLINT DUA0:[DATA.L286NC.N]L286NC.051;
   DRB0:[DRS.NAV]SINSADJ.EXE;
   
   

   Person who carried out this activity:
   

   U.S. Geological Survey (USGS) <http://www.usgs.gov>, Coastal and Marine Geology (CMG) <http://walrus.wr.usgs.gov>
   Attn: Clint Steele <http://walrus.wr.usgs.gov/staff/csteele.html>
   InfoBank Group Leader <http://walrus.wr.usgs.gov/staff/csteele.html>
   USGS, MailStop 999, 345 Middlefield Road
   Menlo Park, CA 94025-3561
   USA
   

   (650) 329-5055 (voice)
   (650) 329-5190 (FAX)
   infobank@octopus.wr.usgs.gov <mailto:infobank@octopus.wr.usgs.gov>
   

3. What similar or related data should the user be aware of?

   U.S. Geological Survey (USGS) <http://www.usgs.gov>, Coastal and Marine Geology (CMG) <http://walrus.wr.usgs.gov>, Unknown, USGS/CMG Information Bank <http://walrus.wr.usgs.gov/infobank/>: U.S. Geological Survey (USGS) <http://www.usgs.gov> Coastal and Marine Geology (CMG) <http://walrus.wr.usgs.gov>, Menlo Park, CA.

   Online Links:

   • <http://walrus.wr.usgs.gov/infobank/>

   Other_Citation_Details:

   Morton, Janet L., Normark, William R., Holmes, Mark L., and Lyle, Mitchell W., 1987, Geologic setting of two sediment-hosted hydrothermal mineral localities in Escanaba Trough, Gorda Ridge, in Sachs, Janet Somerville, ed., USGS research on mineral resources, 1987; program and abstracts: U.S. Geological Survey Circular 0995, p. 49-50. Morton, Janet L., Holmes, Mark L., Normark, William R., Ross, Stephanie L., and Lyle, Mitchell W., 1986, Sedimentary setting of massive sulfide deposits, Escanaba Trough, offshore Northern California: American Geophysical Union Eos, Transactions, v. 67, no. 44, p. 1282-1283. Morton, Janet L., Normark, William R., Ross, Stephanie L., Koski, Randolph A., Holmes, Mark L., Shanks, Wayne C., III, Zierenberg, Robert A., Lyle, Mitchell W., and Benninger, Laura M., 1987, Preliminary report, cruises L1-86-NC and L2-86-NC, Escanaba Trough, Gorda Ridge: U.S. Geological Survey Open-File Report 87-0375-A, 20 p.
   Wong, Florence L., 1989, Mineralogy of sand in turbidites from Escanaba Trough, Northeast Pacific Ocean: U.S. Geological Survey Open-File Report 89-0661, 10 p. Morton, Janet L., Koski, Randolph A., Normark, William R., and Ross, Stephanie L., 1987, Distribution and composition of massive sulfide deposits at Escanaba Trough, southern Gorda Ridge, in McMurray, Gregory R., ed., Gorda Ridge; a seafloor spreading center in the United States' Exclusive Economic Zone; proceedings of the Gorda Ridge symposium: New York, NY, Springer-Verlag. Morton, Janet L., Normark, William R., Clague, David A., and Holmes, Mark L., 1987, Fine-scale segmentation of the sedimented southern Gorda Ridge, offshore Northern California: International Union of Geodesy and Geophysics, General Assembly, v. 19, v. 1, p. 88. Morton, Janet L., Zierenberg, Robert A., and Reiss, Carol A., eds., 1994, Geologic, hydrothermal, and biologic studies at Escanaba Trough, Gorda Ridge, offshore Northern California: U.S. Geological Survey Bulletin 2022, 359 p. Morton, Janet L., Zierenberg, Robert A., and Reiss, Carol A., eds., 1994, Geologic, hydrothermal, and biologic studies at Escanaba Trough, Gorda Ridge, offshore Northern California: U.S. Geological Survey Bulletin 2022, 359 p. Morton, Janet L., Zierenberg, Robert A., and Reiss, Carol A., 1994, Geologic, hydrothermal, and biologic studies at Escanaba Trough; an introduction, in Morton, Janet L., Zierenberg, Robert A., and Reiss, Carol A., eds., Geologic, hydrothermal, and biologic studies at Escanaba Trough, Gorda Ridge, offshore Northern California: U.S. Geological Survey Bulletin 2022, p. 1-18. Morton, Janet L., and Fox, Christopher G., 1994, Structural setting and interaction of volcanism and sedimentation at Escanaba Trough; geophysical results, in Morton, Janet L., Zierenberg, Robert A., Reiss, Carol A., eds., Geologic, hydrothermal, and biologic studies at Escanaba Trough, Gorda Ridge, offshore Northern California: U.S. Geological Survey Bulletin 2022, p. 21-43. Davis, Earl E., and Becker, Keir, 1994, Thermal and tectonic structure of Escanaba Trough; new heat-flow measurements and seismic-reflection profiles, in Morton, Janet L., Zierenberg, Robert A., Reiss, Carol A., eds., Geologic, hydrothermal, and biologic studies at Escanaba Trough, Gorda Ridge, offshore Northern California: U.S. Geological Survey Bulletin 2022, p. 45-64. Denlinger, Roger P., and Holmes, Mark L., 1994, A thermal and mechanical model for sediment hills and associated sulfide deposits along Escanaba Trough, in Morton, Janet L., Zierenberg, Robert A., Reiss, Carol A., eds., Geologic, hydrothermal, and biologic studies at Escanaba Trough, Gorda Ridge, offshore Northern California: U.S. Geological Survey Bulletin 2022, p. 65-75. Karlin, Robert E., and Morton, Janet L., 1994, Crustal magnetization and basement structure of Escanaba Trough, in Morton, Janet L., Zierenberg, Robert A., Reiss, Carol A., eds., Geologic, hydrothermal, and biologic studies at Escanaba Trough, Gorda Ridge, offshore Northern California: U.S. Geological Survey Bulletin 2022, p. 77-90. Normark, William R., Gutmacher, Christina E., Zierenberg, Robert A., Wong, Florence L., and Rosenbauer, Robert J., 1994, Sediment fill of Escanaba Trough, in Morton, Janet L., Zierenberg, Robert A., Reiss, Carol A., eds., Geologic, hydrothermal, and biologic studies at Escanaba Trough, Gorda Ridge, offshore Northern California: U.S. Geological Survey Bulletin 2022, p. 91-129. Karlin, Robert E., and Zierenberg, Robert A., 1994, Sedimentation and neotectonism in the SESCA area, Escanaba Trough, southern Gorda Ridge, in Morton, Janet L., Zierenberg, Robert A., Reiss, Carol A., eds., Geologic, hydrothermal, and biologic studies at Escanaba Trough, Gorda Ridge, offshore Northern California: U.S. Geological Survey Bulletin 2022, p. 131-141. Ross, Stephanie L., and Zierenberg, Robert A., 1994, Volcanic geomorphology of the SESCA and NESCA sites, Escanaba Trough, in Morton, Janet L., Zierenberg, Robert A., Reiss, Carol A., eds., Geologic, hydrothermal, and biologic studies at Escanaba Trough, Gorda Ridge, offshore Northern California: U.S. Geological Survey Bulletin 2022, p. 143-151. Davis, Alice S., Clague, David A., and Friesen, Walter B., 1994, Petrology and mineral chemistry of basalt from Escanaba Trough, in Morton, Janet L., Zierenberg, Robert A., Reiss, Carol A., eds., Geologic, hydrothermal, and biologic studies at Escanaba Trough, Gorda Ridge, offshore Northern California: U.S. Geological Survey Bulletin 2022, p. 153-170. Zierenberg, Robert A., Morton, Janet L., Koski, Randolph A., and Ross, Stephanie L., 1994, Geologic setting of massive sulfide mineralization in Escanaba Trough, in Morton, Janet L., Zierenberg, Robert A., Reiss, Carol A., eds., Geologic, hydrothermal, and biologic studies at Escanaba Trough, Gorda Ridge, offshore Northern California: U.S. Geological Survey Bulletin 2022, p. 171-197. Campbell, Andrew C., German, Chris R., Palmer, Martin R., Gamo, Toshitaka, and Edmond, John M., 1994, Chemistry of hydrothermal fluids from Escanaba Trough, Gorda Ridge, in Morton, Janet L., Zierenberg, Robert A., Reiss, Carol A., eds., Geologic, hydrothermal, and biologic studies at Escanaba Trough, Gorda Ridge, offshore Northern California: U.S. Geological Survey Bulletin 2022, p. 201-221. Bohlke, J.K., and Shanks, W.C., III, 1994, Stable isotope study of hydrothermal vents at Escanaba Trough; observed and calculated effects of sediment-seawater interaction, in Morton, Janet L., Zierenberg, Robert A., Reiss, Carol A., eds., Geologic, hydrothermal, and biologic studies at Escanaba Trough, Gorda Ridge, offshore Northern California: U.S. Geological Survey Bulletin 2022, p. 223-239. Magenheim, Andrew J., and Gieskes, Joris M., 1994, Evidence for hydrothermal fluid flow through surficial sediments, Escanaba Trough, in Morton, Janet L., Zierenberg, Robert A., Reiss, Carol A., eds., Geologic, hydrothermal, and biologic studies at Escanaba Trough, Gorda Ridge, offshore Northern California: U.S. Geological Survey Bulletin 2022, p. 241-255. Zierenberg, Robert A., and Shanks, Wayne C., III, 1994, Sediment alteration associated with massive sulfide formation in Escanaba Trough, Gorda Ridge; the importance of seawater mixing and magnesium metasomatism, in Morton, Janet L., Zierenberg, Robert A., Reiss, Carol A., eds., Geologic, hydrothermal, and biologic studies at Escanaba Trough, Gorda Ridge, offshore Northern California: U.S. Geological Survey Bulletin 2022, p. 257-277. Kvenvolden, Keith A., Rapp, John B., and Hostettler, Frances D., 1994, Hydrocarbons in sediment from Escanaba Trough, in Morton, Janet L., Zierenberg, Robert A., Reiss, Carol A., eds., Geologic, hydrothermal, and biologic studies at Escanaba Trough, Gorda Ridge, offshore Northern California: U.S. Geological Survey Bulletin 2022, p. 279-292. Koski, Randolph A., Benninger, Laura M., Zierenberg, Robert A., and Jonasson, Ian R., 1994, Composition and growth history of hydrothermal deposits in Escanaba Trough, southern Gorda Ridge, in Morton, Janet L., Zierenberg, Robert A., Reiss, Carol A., eds., Geologic, hydrothermal, and biologic studies at Escanaba Trough, Gorda Ridge, offshore Northern California: U.S. Geological Survey Bulletin 2022, p. 293-324. Grassle, J. Frederick, and Petrecca, Rosemarie F., 1994, Soft-sediment hydrothermal vent communities of Escanaba Trough, in Morton, Janet L., Zierenberg, Robert A., Reiss, Carol A., eds., Geologic, hydrothermal, and biologic studies at Escanaba Trough, Gorda Ridge, offshore Northern California: U.S. Geological Survey Bulletin 2022, p. 327-335. Quinterno, Paula J., 1994, Quaternary foraminifers from Escanaba Trough, Northeast Pacific Ocean, in Morton, Janet L., Zierenberg, Robert A., Reiss, Carol A., eds., Geologic, hydrothermal, and biologic studies at Escanaba Trough, Gorda Ridge, offshore Northern California: U.S. Geological Survey Bulletin 2022, p. 337-359. Chezar, Henry, and Newman, Ivy, 2004, DVD-Video Disc set of seafloor transects during USGS research cruises in the Pacific Ocean, U.S. Geological Survey Open-File Report OFR 2004-1133-A Chezar, Henry, and Newman, Ivy, 2004, DVD-Video Disc set of seafloor transects during USGS research cruises in the Pacific Ocean, U.S. Geological Survey Open-File Report OFR 2004-1133-B Chezar, Henry, and Newman, Ivy, 2004, DVD-Video Disc set of seafloor transects during USGS research cruises in the Pacific Ocean, U.S. Geological Survey Open-File Report OFR 2004-1133-C Chezar, Henry, and Newman, Ivy, 2004, DVD-Video Disc set of seafloor transects during USGS research cruises in the Pacific Ocean, U.S. Geological Survey Open-File Report OFR 2004-1133-D Chezar, Henry, and Newman, Ivy, 2004, DVD-Video Disc set of seafloor transects during USGS research cruises in the Pacific Ocean, U.S. Geological Survey Open-File Report OFR 2004-1133-E Chezar, Henry, and Newman, Ivy, 2004, DVD-Video Disc set of seafloor transects during USGS research cruises in the Pacific Ocean, U.S. Geological Survey Open-File Report OFR 2004-1134-A Chezar, Henry, and Newman, Ivy, 2004, DVD-Video Disc set of seafloor transects during USGS research cruises in the Pacific Ocean, U.S. Geological Survey Open-File Report OFR 2004-1134-B Chezar, Henry, and Newman, Ivy, 2004, DVD-Video Disc set of seafloor transects during USGS research cruises in the Pacific Ocean, U.S. Geological Survey Open-File Report OFR 2004-1134-C Chezar, Henry, and Newman, Ivy, 2004, DVD-Video Disc set of seafloor transects during USGS research cruises in the Pacific Ocean, U.S. Geological Survey Open-File Report OFR 2004-1134-D Chezar, Henry, and Newman, Ivy, 2004, DVD-Video Disc set of seafloor transects during USGS research cruises in the Pacific Ocean, U.S. Geological Survey Open-File Report OFR 2004-1134-E Chezar, Henry, and Newman, Ivy, 2004, DVD-Video Disc set of seafloor transects during USGS research cruises in the Pacific Ocean, U.S. Geological Survey Open-File Report OFR 2004-1135-A Chezar, Henry, and Newman, Ivy, 2004, DVD-Video Disc set of seafloor transects during USGS research cruises in the Pacific Ocean, U.S. Geological Survey Open-File Report OFR 2004-1135-B Chezar, Henry, and Newman, Ivy, 2004, DVD-Video Disc set of seafloor transects during USGS research cruises in the Pacific Ocean, U.S. Geological Survey Open-File Report OFR 2004-1135-C Chezar, Henry, and Newman, Ivy, 2004, DVD-Video Disc set of seafloor transects during USGS research cruises in the Pacific Ocean, U.S. Geological Survey Open-File Report OFR 2004-1135-D Chezar, Henry, and Newman, Ivy, 2004, DVD-Video Disc set of seafloor transects during USGS research cruises in the Pacific Ocean, U.S. Geological Survey Open-File Report OFR 2004-1135-E
   
   
   

How reliable are the data; what problems remain in the data set?

1. How well have the observations been checked?

   Identified as best available version.

2. How accurate are the geographic locations?

   Unspecified

3. How accurate are the heights or depths?

   Unspecified

4. Where are the gaps in the data? What is missing?

   Start and end date/times of data

   Navigation Data (l-2-86-nc.070)
   YYYYMMDDHHMMSST    YYYYMMDDHHMMSST
   198607171833000    198607221135000
   198607221142000    198607271101000
   198607271107000    198607281618000
   198607301602000    198608020100000
   YYYYMMDDHHMMSST    YYYYMMDDHHMMSST
   

5. How consistent are the relationships among the observations, including topology?

   Unspecified

How can someone get a copy of the data set?

Are there legal restrictions on access or use of the data?

Access_Constraints:

Physical materials are under controlled on-site access.
If available, access to physical samples is described in the "WR CMG Sample Distribution Policy" at: <http://walrus.wr.usgs.gov/infobank/programs/html/main/sample-dist-policy.html>

Use_Constraints:

Please recognize the U.S. Geological Survey (USGS) as the source of this information.
Physical materials are under controlled on-site access.
Some USGS information accessed through this means may be preliminary in nature and presented without the approval of the Director of the USGS. This information is provided with the understanding that it is not guaranteed to be correct or complete and conclusions drawn from such information are the responsibility of the user.
This information is not intended for navigational purposes.
Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government.

1. Who distributes the data set? (Distributor 1 of 1)
   U.S. Geological Survey (USGS) <http://www.usgs.gov>, Coastal and Marine Geology (CMG) <http://walrus.wr.usgs.gov>
   Attn: Clint Steele <http://walrus.wr.usgs.gov/staff/csteele.html>
   InfoBank Group Leader <http://walrus.wr.usgs.gov/staff/csteele.html>
   USGS, MailStop 999, 345 Middlefield Road
   Menlo Park, CA 94025-3561
   USA
   

   (650) 329-5055 (voice)
   (650) 329-5190 (FAX)
   infobank@octopus.wr.usgs.gov <mailto:infobank@octopus.wr.usgs.gov>
   

2. What's the catalog number I need to order this data set?

   Downloadable Data L-2-86-NC data set <http://walrus.wr.usgs.gov/infobank/l/l286nc/html/l-2-86-nc.meta.html>

3. What legal disclaimers am I supposed to read?

   Please recognize the U.S. Geological Survey (USGS) as the source of this information.
   Physical materials are under controlled on-site access.
   Some USGS information accessed through this means may be preliminary in nature and presented without the approval of the Director of the USGS. This information is provided with the understanding that it is not guaranteed to be correct or complete and conclusions drawn from such information are the responsibility of the user.
   This information is not intended for navigational purposes.
   Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government.
   

4. How can I download or order the data?
   • Availability in digital form:

Who wrote the metadata?

Dates:

Last modified: 31-Mar-2013

Metadata author:

U.S. Geological Survey (USGS) <http://www.usgs.gov>, Coastal and Marine Geology (CMG) <http://walrus.wr.usgs.gov>
Attn: Clint Steele <http://walrus.wr.usgs.gov/staff/csteele.html>
InfoBank Group Leader <http://walrus.wr.usgs.gov/staff/csteele.html>
USGS, MailStop 999, 345 Middlefield Road
Menlo Park, CA 94025-3561
USA

(650) 329-5055 (voice)
(650) 329-5190 (FAX)
infobank@octopus.wr.usgs.gov <mailto:infobank@octopus.wr.usgs.gov>

Metadata standard:

FGDC Content Standards for Digital Geospatial Metadata <http://www.fgdc.gov/> (FGDC-STD-001-1998 <http://www.its.nbs.gov/nbs/meta/meta.html>)