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What does this data set describe?

Title:
Geological and Geophysical data of field activity L-1-76-MX in Baja California from 01/06/1976 to 02/17/1976
Abstract:
Chief Scientists: Bill Normark, Jim Bischoff, Jim Hein. Geological and Geophysical data (airgun, magnetics, chaindredge, Phlegercore, gravitycore, dartcore, 3dot5khz, uniboom, minisparker, VanVeengrab, transitsatellite, dopplersonar, LoranC, LoranA, Niskenbottle, planktonnet, integratednavigation, Shipekgrab) of field activity L-1-76-MX in Baja California from 01/06/1976 to 02/17/1976, <http://walrus.wr.usgs.gov/infobank/l/l176mx/html/l-1-76-mx.meta.html>.
Supplemental_Information:

Equipment Used -
airgun single-channel
magnetics
chaindredge
Phlegercore
gravitycore
dartcore
3dot5khz bathymetry
uniboom
minisparker
VanVeengrab
transitsatellite
dopplersonar
LoranC
LoranA
Niskenbottle
planktonnet
integratednavigation
Shipekgrab
Publications -
Moore, J.G., Normark, W.R., Hess, G.R., and Meyer, C.E., 1977, Petrology of basalt from the
East Pacific Rise near 21 degrees North latitude: Journal of Research of the U.S. Geological
Survey, v. 5, no. 6, p. 753-759.<BR>
<HR>
Hein, J.R., and Yeh, H.W., 1979, Some effects of hydrothermal activity at the intersection of
spreading centers and fracture zones in the Gulf of California: Geological Society of America
Abstracts with Programs, v. 11, no. 7, p. 442. <BR>
<HR>
Bischoff, J.L., and Niemitz, J.W., 1980, Bathymetric maps of the Gulf of California:
U.S. Geological Survey Miscellaneous Investigations Series I-1244, 4 sheets.<BR>
<HR>
Niemitz, Jeffery W., and Bischoff, James L., 1981, Tectonic elements of the southern part
of the Gulf of California: Geological Society of America Bulletin, v. 92, no. 3,
p. I 101-I 104, II 360-II 407.<BR>

Similar information is available for thousands of other USGS/CMG-related Activities.
If known, available are Activity-specific navigation, gravity, magnetics, bathymetry, seismic, and sampling data; track maps; and equipment information; as well as summary overviews, crew lists, and information about analog materials.
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>
Primary access to the USGS/CMG Information Bank's digital data, analog data, and metadata is provided through... <http://walrus.wr.usgs.gov/infobank/>
This page accomodates a variety of search approaches (e.g., by platform, by region, by scientist, by equipment type, etc.).
  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-1-76-MX in Baja California from 01/06/1976 to 02/17/1976: U.S. Geological Survey (USGS) <http://www.usgs.gov>, Coastal and Marine Geology (CMG) <http://walrus.wr.usgs.gov>, Menlo Park, CA.

    Online Links:

  2. What geographic area does the data set cover?

    West_Bounding_Coordinate: -122.60517
    East_Bounding_Coordinate: -106.42083
    North_Bounding_Coordinate: 37.34483
    South_Bounding_Coordinate: 20.86066

  3. What does it look like?

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

    Beginning_Date: 06-Jan-1976
    Ending_Date: 17-Feb-1976
    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: Baja 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.

      The horizontal datum used is North American Datum of 1927.
      The ellipsoid used is Clarke 1866.
      The semi-major axis of the ellipsoid used is 6378206.4.
      The flattening of the ellipsoid used is 1/294.98.

      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:
    Bathymetry with Time Stamp <http://walrus.wr.usgs.gov/infobank/programs/html/definition/bath.html>
    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)

  2. Who also contributed to the data set?

    Andy Stevenson (Geologist); Bill Normark (Chief Scientist); Bob Patrick (Electronics Technician); Bob Rosenbauer (Geologist); Carrie Carpenter (Dafe Curator); Chris Gutmacher (Watchstander); Connie Beaver (Watchstander); Curtis Thompson (Chief Mate); Doug Dolan (Mechanical Technician); Ed Chichester (Watchstander); Frances Cook (Watchstander); Frank Madeiros (Ship Captain); Gerta Callahan-Kell (Geologist); Gordon Hess (Geologist); Gordon Tanner (Electronics Technician); Jeff Niemitz (Geologist); Jim Bischoff (Chief Scientist); Jim Hein (Chief Scientist); John Barron (Geologist); John Simpson (Mechanical Technician); Luc Ortlieb (Geologist); Pat Wilde (Geologist); Rich Garlow (Geologist); Steve Wallace (Mechanical Technician); Steve Wolf (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 2)
    Navigation Data 
    Converted to time format with year at start.

01/30/86 KAYE DUA0:[DATA.L176MX.N]L176MX.051;
DRB0:[DRS.REFMT]REFORMAT.EXE;5

    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>

    Date: 31-Oct-1998 (process 2 of 2)
    Bathymetry Data 
    10/31/1998  /tiger/l/l176mx/bath/l-1-76-mx.335_051
/bear/programs/edit/automerge/automerge

Input was...
Converted to time format with year at start.

03/10/86 BECKIE DUA0:[DATA.BECKIE]L176MX.335;
DRB0:[DRS.BAT]BATRED.EXE;1
This file was reduced using no Matthews correction and
the velocity of sound assumed was 1500m/sec 2-way traveltime.

Input was...
Converted to time format with year at start.

01/30/86 KAYE DUA0:[DATA.L176MX.N]L176MX.051;
DRB0:[DRS.REFMT]REFORMAT.EXE;5

time, lat, long, time(sec) to nearest nav fix, data values

    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:

    Other_Citation_Details:
    Moore, J.G., Normark, W.R., Hess, G.R., and Meyer, C.E., 1977, Petrology of basalt from the East Pacific Rise near 21 degrees North latitude: Journal of Research of the U.S. Geological Survey, v. 5, no. 6, p. 753-759. Hein, J.R., and Yeh, H.W., 1979, Some effects of hydrothermal activity at the intersection of spreading centers and fracture zones in the Gulf of California: Geological Society of America Abstracts with Programs, v. 11, no. 7, p. 442. Bischoff, J.L., and Niemitz, J.W., 1980, Bathymetric maps of the Gulf of California: U.S. Geological Survey Miscellaneous Investigations Series I-1244, 4 sheets. Niemitz, Jeffery W., and Bischoff, James L., 1981, Tectonic elements of the southern part of the Gulf of California: Geological Society of America Bulletin, v. 92, no. 3, p. I 101-I 104, II 360-II 407.


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-1-76-mx.051 [SINS])
YYYYMMDDHHMMSST    YYYYMMDDHHMMSST
197601060000000    197602091342000
197602102315000    197602170422000
YYYYMMDDHHMMSST    YYYYMMDDHHMMSST
Bathymetry Data (l-1-76-mx.335_051)
YYYYMMDDHHMMSST    YYYYMMDDHHMMSST
197601060000060    197601060202480
197601060227300    197601060605420
197601060633480    197601060808480
197601060838000    197601061704360
197601061715120    197601062241120
197601062258360    197601062315000
197601062331300    197601070800120
197601071628000    197601080550240
197601092057060    197601092204480
197601092215000    197601101611360
197601101724540    197601101803000
197601122143060    197601122300000
197601122330060    197601130132060
197601131530120    197601131637360
197601131702540    197601141534000
197601141546240    197601142309300
197601142320000    197601150304300
197601150315060    197601151200000
197601151229540    197601151907300
197601151918240    197601170008420
197601170148420    197601170327120
197601170450240    197601170640480
197601170759360    197601171313360
197601171420180    197601171453420
197601171516240    197601172013480
197601172027000    197601172135240
197601172238000    197601180700360
197601180719000    197601182303360
197601182316300    197601191303480
197601191315180    197601191608240
197601191755060    197601200915540
197601221348540    197601222221000
197601222241540    197601230017480
197601230028480    197601230103420
197601230118480    197601230505300
197601230530240    197601230614180
197601230642360    197601230915000
197601230934360    197601231424420
197601231440240    197601231709360
197601231733480    197601231959180
197601232028060    197601240126360
197601240155540    197601241038060
197601241049060    197601241957060
197601242015360    197601250043540
197601250057420    197601250116060
197601250144360    197601251649420
197601251703060    197601251921420
197601251938420    197601260219480
197601260240000    197601260611420
197601281915240    197601282159540
197601282213120    197601282315480
197601282328180    197601290035060
197601290109540    197601290305000
197601290336300    197601290838420
197601290850000    197601291057540
197601291118480    197601291815000
197601291919480    197601291958060
197601292019000    197601292345360
197601300000120    197601300801180
197601300811300    197601301207240
197601301233000    197601301752000
197601301805180    197601301908480
197601301924000    197601310715120
197601310755240    197601310840060
197601310859540    197601311716480
197601311734420    197602010556060
197602010613540    197602010616120
197602010629000    197602020325480
197602020339300    197602020354000
197602020409300    197602020540420
197602020551420    197602020813420
197602020831120    197602020850240
197602020904480    197602021428480
197602021440240    197602030411540
197602030458540    197602031842360
197602031853120    197602031945480
197602031957240    197602040209060
197602040227420    197602040309120
197602040335000    197602040335000
197602040345540    197602040531060
197602040606240    197602041614060
197602041624480    197602041949240
197602042006180    197602042350420
197602050001000    197602050617000
197602050634480    197602050724540
197602050740300    197602051128000
197602051138360    197602051201300
197602051216300    197602051216300
197602051226540    197602051524420
197602051535180    197602051556120
197602051614000    197602060012480
197602060038300    197602060230000
197602060243120    197602060419120
197602060444300    197602060521300
197602060544000    197602061841120
197602061854540    197602070026180
197602070145180    197602070244540
197602070257000    197602070616420
197602070633000    197602071052540
197602071103360    197602071259480
197602071316240    197602071359300
197602071423360    197602071735300
197602071750060    197602072224240
197602072308420    197602080045000
197602080104060    197602080117420
197602080150480    197602080203240
197602080221060    197602080521360
197602080549540    197602081451420
197602081512300    197602081822180
197602081845480    197602081916120
197602081926480    197602082359420
197602102309480    197602110222120
197602110243180    197602110556540
197602110635180    197602112038120
197602112053300    197602112144540
197602112206000    197602112325000
197602112335540    197602120324120
197602120438060    197602120646060
197602120810240    197602122029300
197602122058120    197602122218420
197602122249360    197602122304120
197602122314180    197602130056360
197602130112120    197602130204120
197602130228060    197602130428300
197602130438360    197602130711540
197602130731480    197602130829360
197602130859120    197602131208420
197602131241300    197602131929420
197602131955480    197602132222420
197602132245180    197602140229300
197602140240000    197602140318240
197602140329420    197602141317540
197602141359120    197602141745120
197602141755300    197602150209240
197602150220420    197602150325120
197602150343240    197602150411180
197602150436060    197602150610060
197602150620420    197602150657240
197602150737420    197602151919540
197602151931000    197602152327480
197602152338060    197602160144360
197602160158240    197602160621000
197602160700240    197602160829540
197602160842120    197602162013180
197602162046060    197602162154120
197602162250360    197602170015000
197602170106480    197602170421360
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-1-76-MX data set <http://walrus.wr.usgs.gov/infobank/l/l176mx/html/l-1-76-mx.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:

Data format: ASCII Size: 0.1
Network links: <http://walrus.wr.usgs.gov/infobank/l/l176mx/html/l-1-76-mx.nav.html>

Data format: ASCII Size: 2.1
Network links: <http://walrus.wr.usgs.gov/infobank/l/l176mx/html/l-1-76-mx.bath.html>

  • Cost to order the data: None

    • 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>)

    Generated by mp version 2.9.13 on Sun Mar 31 07:19:47 2013