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BLM/OCS South Texas Outer Continental Shelf (STOCS) Project Sediment Data

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The South Texas Outer Continental Shelf Project (STOCS) conducted by the University of Texas and the USGS with funding from BLM/NOAA. The USGS produced geochemical analyses of sediment and suspended sediment, clay mineralogy, and physical properties of sediment for 264 samples collected from October 26, 1974 to December 21, 1974. Additional grain size analyses are not included in the Seafloor sediment digital grain size database due to numerous errors. The University of Texas produced grain size analyses in the historic 073 format for 1647 sea floor samples collected from February 8, 1976 to October 18, 1977. Data include collecting institution, ship, cruise, sample id, latitude/longitude, date of collection, water depth, sampling device, method of analysis, sample weight, sampled interval, raw weight percentages of sediment, within a given phi range. Some samples also have percentages of total gravel, sand, silt, clay, and statistical measurements such as mean, median, skewness, kurtosis, and standard deviation of grain size. These data are part of the larger digital grain size database.
Cite this dataset when used as a source.
Online Access
  • Data files and documentation (download)
    Original data and documentation for MGGID 03565001: Grain size data compiled by W.E. Behrens, University of Texas, from multiple cruises of the R/V Longhorn. STOCS cruises 18-20, 24, 26, 28, 30, 32, 34, 37, 39, 40, 42, 46, 49, 54-55, 59-60, 68, 69-71, 80, and 82 offshore S. Texas in the Western Gulf of Mexico from February 8, 1976-October 18, 1977, and 2) MGG06105001. Grain size, trace metal analyses, and clay mineralogy compiled by Henry Berryhill, USGS, for grab and suspended sediment samples collected by the R/V Kana Keoki (MGG06105001), cruises BLM-STG 001-274, OCS G001-G274, OCS-B016-G273, OCS-W107-246B offshore S. Texas in the Western Gulf of Mexico from October 26-December 21, 1974.
  • Database extract MGG03565001 (download)
    Download grain size data for MGG03565001 in delimited form from the NGDC Seafloor Sediment Grain Size Database.
Distribution Formats
  • ASCII (Version: UTF-8)
    • File Specification: American Standard Code for Information Interchange (ASCII) text format.
  • tar.gz (Version: unknown)
    • File Specification: compressed tape archive (tar) file
Distributor DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce
Dataset Point of Contact Marine Geology Data Manager
Marine Geology Data Manager
DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce
(303) 497-4603
General Documentation
Associated Resources
  • publication: 1985-03-20
  • revision: 1985-03-20
Edition: First
Data Presentation Form: Digital table - digital representation of facts or figures systematically displayed, especially in columns
Dataset Progress Status Complete
Data Update Frequency: Not planned - Completed data set, no additions planned.
Supplemental Information:
The data set consists of two parts: 1) MGG06105001 received May 28, 1976 from Henry Berryhill, USGS Office of Marine Geology, Corpus Christi, TX, in fulfillment of Contract no. BLM-08550-MU5-20, and 2) MGG03565001 received in 1985 from W.E. Behrens of the University of Texas, through Francis Mitchell of NODC, also part of the STOCS project. MGG03565001 contains grain size data for multiple cruises of the R/V Longhorn. Data set MGG06105001 contains multiple data types (grain size, clay mineralogy, and trace metals) with accompanying formats and documentation.
Purpose: environmental research
Use Limitations
  • Please cite the originator of the data set, the date downloaded, and the National Centers for Environmental Information, NOAA, as the source of the data.
  • Produced by the NOAA National Centers for Environmental Information. Not subject to copyright protection within the United States.
  • William E. Behrens
    University of Texas
  • Henry Berryhill
    U.S. Geological Survey
  • DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce
Time Period: 1974-02-08 to 1977-10-18
Spatial Reference System: urn:ogc:def:crs:EPSG:4326
Spatial Bounding Box Coordinates:
N: 28.233
S: 26.166
E: -96.116
W: -97.333
Spatial Coverage Map:
Theme keywords
  • Scientific archives
  • Electronic records
  • Oceanography
  • Ocean bottom
  • Geology
  • Submarine geology
  • Marine sediments
  • Marine geology
  • Sea-floor characteristics
  • EARTH SCIENCE > Oceans > Marine Sediments > Sedimentary Textures
  • EARTH SCIENCE > Oceans > Marine Sediments > Sediment Chemistry
  • EARTH SCIENCE > Oceans > Marine Sediments > Geotechnical Properties
  • EARTH SCIENCE > Solid Earth > Rocks/Minerals/Crystals > Trace Elements
  • EARTH SCIENCE > Oceans > Marine Environment Monitoring
Data Center keywords
  • DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce
  • DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce
Platform keywords
  • In Situ Ocean-based Platforms > SHIPS
Instrument keywords
  • In Situ/Laboratory Instruments > Corers > CORING DEVICES
  • In Situ/Laboratory Instruments > Samplers > Grabbers/Traps/Collectors > GRAB SAMPLERS
  • In Situ/Laboratory Instruments > Corers > SEDIMENT CORERS
Place keywords
Project keywords
Use Constraints
  • While every effort has been made to ensure that these data are accurate and reliable within the limits of the current state of the art, NOAA cannot assume liability for any damages caused by any errors or omissions in the data, nor as a result of the failure of the data to function on a particular system. NOAA makes no warranty, expressed or implied, nor does the fact of distribution constitute such a warranty.
Access Constraints
  • Access to this dataset is unrestricted.
  • free online download
Lineage information for: dataset
Lineage Statement These data were contributed by the originator to NOAA's former National Oceanographic Data Center (NODC) and may be part of a larger compilation archived as oceanographic data by NCEI. Data for MGG06105001 were received in 1976 on nine track magnetic tape, ASCII form, 80 character records blocked to 4000 characters per block. File contents: 1) 073 data cruise BLM-STG 001-274 with gross errors; 2-4) grain size data not in 073 format, OCS-6001-G274, OCS-B016-G273, OCS-W107-246B; 5) Appendix 2; 6) clay mineralogy; 7) trace metals from surficial sediments; 8) trace metals from suspended sediments. There were 4, 423 records, 261 with analytical data from cruise Kana Keoki Oct 26-Dec 21,1974. Grain size data were not translated/added to the 073 format/the historic NGDC Seafloor Sediment Grain Size Database due to gross errors. The final copy of additional STOCS data, MGG03565001, were received on nine track ASCII magnetic tape in 1985 from Francis Mitchell of NODC combined with data from the MAFLA project. STOCS data comprised files 11 through 35 of the tape and included 15,175 lines of 073 grain size data with no major errors, so were processed into the grain size database.
Processing Environment
Source Datasets
Lineage information for: repository
Processing Steps
  • 2015-04-22T00:00:00 - NOAA created the National Centers for Environmental Information (NCEI) by merging NOAA's National Climatic Data Center (NCDC), National Geophysical Data Center (NGDC), and National Oceanographic Data Center (NODC), including the National Coastal Data Development Center (NCDDC), per the Consolidated and Further Continuing Appropriations Act, 2015, Public Law 113-235. NCEI launched publicly on April 22, 2015.
Acquisition Information (collection)
  • In Situ/Laboratory Instruments
  • In Situ/Laboratory Instruments
  • In Situ/Laboratory Instruments
Last Modified: 2015-12-31
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