Geochemistry of fine sediment from San Francisco Bay shoals (2012) and tributaries (2010, 2012, 2013)

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Frequently anticipated questions:

What does this data set describe?

Title:
Geochemistry of fine sediment from San Francisco Bay shoals (2012) and tributaries (2010, 2012, 2013)
Abstract:
Elemental chemistry and weight percent of the less than 0.063 mm fine sediment fraction are reported for surface sediments from shoals, the ebb tide delta, local tributaries, and inland rivers that carry sediment to San Francisco Bay, California.
Supplemental_Information:
Surface sediment from San Francisco Bay was collected by the San Francisco Estuary Institute Regional Monitoring Program (RMP) in August 2011 (14 sites with Sample_ID beginning in RMP). Additional information about USGS field activities from which data were derived is available online at:
http://cmgds.marine.usgs.gov/fan_info.php?fan=S710SF
http://cmgds.marine.usgs.gov/fan_info.php?fan=S0112SF
Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government.
  1. How might this data set be cited?
    Takesue, Renee K., 20230725, Geochemistry of fine sediment from San Francisco Bay shoals (2012) and tributaries (2010, 2012, 2013): data release DOI:10.5066/P9CH2ZWD, U.S. Geological Survey, Pacific Coastal and Marine Science Center, Santa Cruz, California.

    Online Links:

    Other_Citation_Details:
    Suggested Citation: Takesue, R.K., 2023, Geochemistry of fine sediment from San Francisco Bay shoals (2012) and tributaries (2010, 2012, 2013): U.S. Geological Survey data release, https://doi.org/10.5066/P9CH2ZWD
  2. What geographic area does the data set cover?
    West_Bounding_Coordinate: -122.67853
    East_Bounding_Coordinate: -121.22921
    North_Bounding_Coordinate: 38.56064
    South_Bounding_Coordinate: 37.33939
  3. What does it look like?
    https://www.sciencebase.gov/catalog/file/get/63387bfcd34e900e86cdd8c8?name=pic_BenthicSampler.JPG&allowOpen=true (JPEG)
    USGS scientists prepare to collect mud from a benthic sampler.
  4. Does the data set describe conditions during a particular time period?
    Beginning_Date: 07-Mar-2010
    Ending_Date: 11-Jun-2013
    Currentness_Reference:
    Bay sediment was collected in August 2011 (RMP) and January 2012 (USGS). River and stream sediments were collected in March and April 2010, March 2012 (Petaluma River), and February 2013 (additional sites on the Sacramento and San Joaquin Rivers).
  5. What is the general form of this data set?
    Geospatial_Data_Presentation_Form: comma-delimited text
  6. How does the data set represent geographic features?
    1. How are geographic features stored in the data set?
      This is a Point data set. It contains the following vector data types (SDTS terminology):
      • Point (143)
    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 D_WGS_1984.
      The ellipsoid used is WGS84.
      The semi-major axis of the ellipsoid used is 6378137.0000.
      The flattening of the ellipsoid used is 1/298.2572.
  7. How does the data set describe geographic features?
    SanFranciscoBayandTributaryGeochemistry.csv
    Table of data. -9999 indicates not determined, -1111 indicates the sample was below the analytical detection limit. (Source: Producer defined)
    Job_ID
    Unique laboratory identifier assigned to a batch of samples by the GGGSC Analytical Chemistry Laboratory (Source: producer defined) Unique alphanumeric batch identifier
    Lab_ID
    Unique laboratory identifier assigned to each sample by the GGGSC Analytical Chemistry Laboratory (Source: producer defined) Unique alphanumeric lab sample identifier
    Sample_ID
    Unique sample identifier assigned during field collection based on location and order of collection (Source: producer defined) Unique alphanumeric field sample identifier
    Latitude
    Latitude where the sample was collected (Source: producer defined)
    Range of values
    Minimum:37.33939
    Maximum:38.56064
    Units:decimal degrees
    Resolution:0.00001
    Longitude
    Longitude where the sample was collected (Source: producer defined)
    Range of values
    Minimum:-122.67853
    Maximum:-121.22921
    Units:decimal degrees
    Resolution:0.00001
    Collection_date
    Date the sample was collected, in mm/dd/yy (Source: producer defined)
    Range of values
    Minimum:03/07/2010
    Maximum:02/09/2013
    Units:mm/dd/yyyy
    Resolution:1
    Depth
    Water depth at which the sample was collected; -9999=not determined (Source: producer defined)
    Range of values
    Minimum:0.0
    Maximum:29.9
    Units:meters
    Resolution:0.1
    Site_description
    Location where the sample was collected (Source: producer defined) Text describing the sample collection site
    Percent_fines
    Percentage of the less than 0.063 mm sediment size fraction; -9999=not determined (Source: producer defined)
    Range of values
    Minimum:0
    Maximum:99
    Units:weight percent
    Resolution:1
    Al_by_fusion
    Aluminum (Al) content of fused, digested sediment (Source: Producer defined)
    Range of values
    Minimum:5.26
    Maximum:9.04
    Units:weight percent
    Resolution:0.01
    Ca_by_fusion
    Calcium (Ca) content of fused, digested sediment (Source: Producer defined)
    Range of values
    Minimum:0.8
    Maximum:6.0
    Units:weight percent
    Resolution:0.1
    Fe_by_fusion
    Iron (Fe) content of fused, digested sediment (Source: Producer defined)
    Range of values
    Minimum:2.39
    Maximum:8.38
    Units:weight percent
    Resolution:0.01
    K_by_multi-acid
    Potassium (K) content of multi-acid digested sediment; -9999=not determined (Source: Producer defined)
    Range of values
    Minimum:0.98
    Maximum:2.29
    Units:weight percent
    Resolution:0.01
    Mg_by_fusion
    Magnesium (Mg) content of fused, digested sediment (Source: Producer defined)
    Range of values
    Minimum:0.73
    Maximum:2.51
    Units:weight percent
    Resolution:0.01
    Na_by_multi-acid
    Sodium (Na) content of multi-acid digested sediment; -9999=not determined (Source: producer defined)
    Range of values
    Minimum:0.51
    Maximum:2.93
    Units:weight percent
    Resolution:0.01
    Ti_by_fusion
    Titanium (Ti) content of fused, digested sediment (Source: producer defined)
    Range of values
    Minimum:0.32
    Maximum:1.05
    Units:weight percent
    Resolution:0.01
    As_by_multi-acid
    Arsenic (As) content of multi-acid digested sediment; -9999=not determined (Source: producer defined)
    Range of values
    Minimum:5
    Maximum:21
    Units:milligrams per kilogram (mg per kg)
    Resolution:1
    Ba_by_fusion
    Barium (Ba) content of fused, digested sediment (Source: producer defined)
    Range of values
    Minimum:344
    Maximum:1280
    Units:milligrams per kilogram (mg per kg)
    Resolution:1
    Be_by_multi-acid
    Beryllium (Be) content of multi-acid digested sediment; -9999=not determined (Source: producer defined)
    Range of values
    Minimum:0.7
    Maximum:1.8
    Units:milligrams per kilogram (mg per kg)
    Resolution:0.1
    Bi_by_multi-acid
    Bismuth (Bi) content of multi-acid digested sediment; -9999=not determined (Source: producer defined)
    Range of values
    Minimum:0.06
    Maximum:0.60
    Units:milligrams per kilogram (mg per kg)
    Resolution:0.01
    Cd_by_multi-acid
    Cadmium (Cd) content of multi-acid digested sediment; -9999=not determined (Source: producer defined)
    Range of values
    Minimum:0.1
    Maximum:0.9
    Units:milligrams per kilogram (mg per kg)
    Resolution:0.1
    Ce_by_fusion
    Cerium (Ce) content of fused, digested sediment (Source: producer defined)
    Range of values
    Minimum:32.2
    Maximum:138.0
    Units:milligrams per kilogram (mg per kg)
    Resolution:0.1
    Co_by_fusion
    Cobalt (Co) content of fused, digested sediment (Source: producer defined)
    Range of values
    Minimum:7.7
    Maximum:39.7
    Units:milligrams per kilogram (mg per kg)
    Resolution:0.1
    Cr_by_fusion
    Chromium (Cr) content of fused, digested sediment (Source: producer defined)
    Range of values
    Minimum:120
    Maximum:2050
    Units:milligrams per kilogram (mg per kg)
    Resolution:1
    Cs_by_fusion
    Cesium (Cs) content of fused, digested sediment (Source: producer defined)
    Range of values
    Minimum:1.4
    Maximum:10.7
    Units:milligrams per kilogram (mg per kg)
    Resolution:0.1
    Cu_by_fusion
    Copper (Cu) content of fused, digested sediment (Source: producer defined)
    Range of values
    Minimum:7
    Maximum:93
    Units:milligrams per kilogram (mg per kg)
    Resolution:1
    Dy_by_fusion
    Dysprosium (Dy) content of fused, digested sediment (Source: producer defined)
    Range of values
    Minimum:2.81
    Maximum:8.79
    Units:milligrams per kilogram (mg per kg)
    Resolution:0.01
    Er_by_fusion
    Erbium (Er) content of fused, digested sediment (Source: producer defined)
    Range of values
    Minimum:1.59
    Maximum:6.64
    Units:milligrams per kilogram (mg per kg)
    Resolution:0.01
    Eu_by_fusion
    Europium (Eu) content of fused, digested sediment (Source: producer defined)
    Range of values
    Minimum:0.72
    Maximum:1.61
    Units:milligrams per kilogram (mg per kg)
    Resolution:0.01
    Ga_by_fusion
    Gallium (Ga) content of fused, digested sediment (Source: producer defined)
    Range of values
    Minimum:11
    Maximum:20
    Units:milligrams per kilogram (mg per kg)
    Resolution:1
    Gd_by_fusion
    Gadolinium (Gd) content of fused, digested sediment (Source: producer defined)
    Range of values
    Minimum:3.03
    Maximum:8.83
    Units:milligrams per kilogram (mg per kg)
    Resolution:0.01
    Hf_by_fusion
    Hafnium (Hf) content of fused, digested sediment (Source: producer defined)
    Range of values
    Minimum:3
    Maximum:120
    Units:milligrams per kilogram (mg per kg)
    Resolution:1
    Ho_by_fusion
    Holmium (Ho) content of fused, digested sediment (Source: producer defined)
    Range of values
    Minimum:0.55
    Maximum:1.89
    Units:milligrams per kilogram (mg per kg)
    Resolution:0.01
    In_by_multi-acid
    Indium (In) content of multi-acid digested sediment; -9999=not determined (Source: producer defined)
    Range of values
    Minimum:0.03
    Maximum:0.09
    Units:milligrams per kilogram (mg per kg)
    Resolution:0.01
    La_by_fusion
    Lanthanum (La) content of fused, digested sediment (Source: producer defined)
    Range of values
    Minimum:15.2
    Maximum:69.0
    Units:milligrams per kilogram (mg per kg)
    Resolution:0.1
    Li_by_multi-acid
    Lithium (Li) content of multi-acid digested sediment; -9999=not determined (Source: producer defined)
    Range of values
    Minimum:18
    Maximum:59
    Units:milligrams per kilogram (mg per kg)
    Resolution:1
    Lu_by_fusion
    Lutetium (Lu) content of fused, digested sediment (Source: Producer defined)
    Range of values
    Minimum:0.22
    Maximum:1.49
    Units:milligrams per kilogram (mg per kg)
    Resolution:0.01
    Mn_by_multi-acid
    Manganese (Mn) content of multi-acid digested sediment; -9999=not determined (Source: producer defined)
    Range of values
    Minimum:311
    Maximum:2000
    Units:milligrams per kilogram (mg per kg)
    Resolution:1
    Mo_by_multi-acid
    Molybdenum (Mo) content of multi-acid digested sediment; -9999=not determined (Source: producer defined)
    Range of values
    Minimum:0.48
    Maximum:1.96
    Units:milligrams per kilogram (mg per kg)
    Resolution:0.01
    Nb_by_multi-acid
    Niobium (Nb) content of multi-acid digested sediment; -9999=not determined (Source: producer defined)
    Range of values
    Minimum:6.4
    Maximum:18.3
    Units:milligrams per kilogram (mg per kg)
    Resolution:0.1
    Nd_by_fusion
    Neodymium (Nd) content of fused, digested sediment (Source: producer defined)
    Range of values
    Minimum:14.3
    Maximum:54.1
    Units:milligrams per kilogram (mg per kg)
    Resolution:0.1
    Ni_by_fusion
    Nickel (Ni) content of fused, digested sediment (Source: producer defined)
    Range of values
    Minimum:41
    Maximum:125
    Units:milligrams per kilogram (mg per kg)
    Resolution:1
    P_by_multi-acid
    Phosphorus (P) content of multi-acid digested sediment; -9999=not determined (Source: producer defined)
    Range of values
    Minimum:480
    Maximum:1430
    Units:milligrams per kilogram (mg per kg)
    Resolution:1
    Pb_by_fusion
    Lead (Pb) content of fused, digested sediment (Source: producer defined)
    Range of values
    Minimum:6
    Maximum:99
    Units:milligrams per kilogram (mg per kg)
    Resolution:1
    Pr_by_fusion
    Praseodymium (Pr) content of fused, digested sediment (Source: producer defined)
    Range of values
    Minimum:3.78
    Maximum:15.20
    Units:milligrams per kilogram (mg per kg)
    Resolution:0.01
    Rb_by_fusion
    Rubidium (Rb) content of multi-acid digested sediment (Source: producer defined)
    Range of values
    Minimum:26.5
    Maximum:95.0
    Units:milligrams per kilogram (mg per kg)
    Resolution:0.1
    Sb_by_fusion
    Antimony (Sb) content of fused, digested sediment (Source: producer defined)
    Range of values
    Minimum:0.3
    Maximum:3.2
    Units:milligrams per kilogram (mg per kg)
    Resolution:0.1
    Sc_by_multi-acid
    Scandium (Sc) content of multi-acid digested sediment; -9999=not determined (Source: producer defined)
    Range of values
    Minimum:9.2
    Maximum:22.8
    Units:milligrams per kilogram (mg per kg)
    Resolution:0.1
    Sm_by_fusion
    Samarium (Sm) content of fused, digested sediment (Source: Producer defined)
    Range of values
    Minimum:3.1
    Maximum:10.5
    Units:milligrams per kilogram (mg per kg)
    Resolution:0.1
    Sn_by_fusion
    Tin (Sn) content of fused, digested sediment; -1111 indicates the sample was below the analytical detection limit of 0.5 mg per kg (Source: Producer defined)
    Range of values
    Minimum:1
    Maximum:18
    Units:milligrams per kilogram (mg per kg)
    Resolution:1
    Sr_by_fusion
    Strontium (Sr) content of fused, digested sediment (Source: producer defined)
    Range of values
    Minimum:116
    Maximum:370
    Units:milligrams per kilogram (mg per kg)
    Resolution:1
    Tb_by_fusion
    Terbium (Tb) content of fused, digested sediment (Source: producer defined)
    Range of values
    Minimum:0.45
    Maximum:1.37
    Units:milligrams per kilogram (mg per kg)
    Resolution:0.01
    Th_by_fusion
    Thorium (Th) content of fused, digested sediment (Source: producer defined)
    Range of values
    Minimum:3.9
    Maximum:29.2
    Units:milligrams per kilogram (mg per kg)
    Resolution:0.1
    Tl_by_multi-acid
    Thallium (Tl) content of multi-acid digested sediment; -9999=not determined (Source: producer defined)
    Range of values
    Minimum:0.2
    Maximum:0.5
    Units:milligrams per kilogram (mg per kg)
    Resolution:0.1
    Tm_by_fusion
    Thulium (Tm) content of fused, digested sediment (Source: producer defined)
    Range of values
    Minimum:0.20
    Maximum:1.10
    Units:milligrams per kilogram (mg per kg)
    Resolution:0.01
    U_by_fusion
    Uranium (U) content of fused, digested sediment (Source: producer defined)
    Range of values
    Minimum:1.85
    Maximum:13.00
    Units:milligrams per kilogram (mg per kg)
    Resolution:0.01
    V_by_fusion
    Vanadium (V) content of fused, digested sediment (Source: producer defined)
    Range of values
    Minimum:83
    Maximum:242
    Units:milligrams per kilogram (mg per kg)
    Resolution:1
    W_by_multi-acid
    Tungsten (W) content of multi-acid digested sediment; -9999=not determined (Source: producer defined)
    Range of values
    Minimum:0.7
    Maximum:3.2
    Units:milligrams per kilogram (mg per kg)
    Resolution:0.1
    Y_by_fusion
    Yttrium (Y) content of fused digested sediment (Source: producer defined)
    Range of values
    Minimum:15.7
    Maximum:58.9
    Units:milligrams per kilogram (mg per kg)
    Resolution:0.1
    Yb_by_fusion
    Ytterbium (Yb) content of fused digested sediment (Source: producer defined)
    Range of values
    Minimum:1.6
    Maximum:8.5
    Units:milligrams per kilogram (mg per kg)
    Resolution:0.1
    Zn_by_multi-acid
    Zinc (Zn) content of multi-acid digested sediment; -9999=not determined (Source: producer defined)
    Range of values
    Minimum:55
    Maximum:216
    Units:milligrams per kilogram (mg per kg)
    Resolution:1
    Zr_by_fusion
    Zirconium (Zr) content of the fused, digested sediment (Source: producer defined)
    Range of values
    Minimum:109
    Maximum:4280
    Units:milligrams per kilogram (mg per kg)
    Resolution:1
    Entity_and_Attribute_Overview: The first line of the csv file is a header line.
    Entity_and_Attribute_Detail_Citation: U.S. Geological Survey

Who produced the data set?

  1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)
    • Renee K. Takesue
  2. Who also contributed to the data set?
    Don Woodrow collected single hand-grab samples from stream banks or stream beds of local and inland tributaries in March and April 2010. Angela Tan analyzed sediment grain size distributions at the USGS Pacific Coastal and Marine Science Center Sediment Laboratory. Elemental chemistry analyses were performed by AGAT Laboratories under contract to the Analytical Chemistry Project of the USGS Geology, Geophysics, and Geochemistry Science Center (GGGSC). GGGSC staff performed QA/QC checks.
  3. To whom should users address questions about the data?
    U.S. Geological Survey, Pacific Coastal and Marine Science Center
    Attn: PCMSC Science Data Coordinator
    2885 Mission Street
    Santa Cruz, CA

    831-427-4747 (voice)
    pcmsc_data@usgs.gov

Why was the data set created?

A sediment geochemical sourcing study was carried out in San Francisco Bay, its local tributaries, and inland rivers to explore the relative importance of fine sediment inputs from local versus inland watersheds. The availability of sediment from local watersheds is an important consideration for wetland habitat restoration and coastal resilience planning because sediment loads from inland watersheds are decreasing and relative water levels are increasing.

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: 09-Feb-2013 (process 1 of 3)
    SEDIMENT COLLECTION. Single hand-grab samples were collected from local streams and inland rivers in March and April 2010. Surface sediment from the shoals and ebb tide delta of San Francisco Bay was collected in January 2012 using a benthic grab sampler deployed from the USGS research vessel Parke Snavely. Single hand-grab samples were collected from Petaluma River in March 2012 and inland rivers in February 2013.
    Date: 27-Apr-2012 (process 2 of 3)
    SEDIMENT GRAIN SIZE ANALYSIS. Sediment grain size distributions were determined at the USGS Pacific Coastal and Marine Science Center Sediment Laboratory. To remove organic material, 10 milliliters of 35 percent hydrogen peroxide were added to 20 grams of sediment. The sample was heated to 250 degrees Celsius to remove any remaining hydrogen peroxide and was placed in an ultrasonic bath to liberate the less than 0.063 millimeter-diameter fine fraction. The sample was centrifuged for 1.5 hours in deionized water to remove soluble salts. Samples were funneled through 2 millimeter- and 0.063 millimeter-diameter mesh sieves to separate gravel-sized (greater than 2 millimeter), sand-sized (0.063 to 2 millimeter), and mud-sized (less than 0.063 millimeter) particles. The sand and gravel fractions were dried at 80 degrees Celsius and weighed. Five milliliters of sodium hexametaphosphate were added to the mud fraction and a 20-milliliter aliquot was taken from a 1-liter graduated cylinder to determine the weight of the mud. The particle-size distribution of the mud and sand fraction was analyzed separately using a Beckman Coulter LS 13 320, and the gravel, sand, and mud results were integrated into a single grain-size distribution for each sample. Person who carried out this activity:
    Angela Tan
    U.S. Geological Survey, Pacific Coastal and Marine Science Center
    Physical Scientist
    2885 Mission Street
    Santa Cruz, CA

    831-460-7409 (voice)
    atan@usgs.gov
    Date: 11-Jun-2013 (process 3 of 3)
    ELEMENTAL CHEMISTRY. Bulk sediment was oven-dried at 60 degrees Celsius and disaggregated gently with a mortar and pestle to avoid changing grain sizes. Disaggregated sediment was dry-sieved through stainless steel sieves to obtain 2 grams of the less than 0.063 millimeter fine fraction. Fine sediments were sent to the Analytical Chemistry Project of the USGS Geology, Geophysics, and Geochemistry Science Center (GGGSC), which contracted SGS Inc. Laboratory for analyses of major, minor, and trace element contents using two methods: a near-total four-acid digestion (labeled multi-acid in the table of data) and a total digestion with a sodium peroxide fusion (labeled fusion in the table of data) for elements hosted in acid-resistant minerals. Quantification was performed by inductively coupled plasma atomic emission spectroscopy (ICP-OES) for major and some minor elements and by inductively coupled plasma mass spectroscopy (ICP-MS) for some minor and all trace elements. Person who carried out this activity:
    Jaime Azain
    USGS Geology, Geophysics, and Geochemistry Science Center
    Research Geologist
    Denver Federal Center, Bldg 20
    Denver, CO

    303-236-9376 (voice)
    jsazain@usgs.gov
  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?
    For sediment grain size analyses (GSA), the laser particle counter was calibrated with three manufacturer-provided standards every day. Process duplicates for GSA were analyzed every 20 samples and were within 15 percent. For elemental chemistry determinations, long-term internal reference materials were used to standardize the data. The percent recovery for all elements was within 15 percent of reference values for concentrations that were not less than five times the limit of detection.
  2. How accurate are the geographic locations?
    A Garmin handheld GPS reported a horizontal accuracy of +/- 3 meters.
  3. How accurate are the heights or depths?
  4. Where are the gaps in the data? What is missing?
    Sample collection depths were not determined for 14 samples collected by RMP. Grain size distribution (percent fines) was not analyzed in CB_598 or tributary samples collected in 2012 and 2013. Thirty size sandy samples out of 143 total had insufficient fine material for multi-acid analysis of elements: potassium (K), sodium (Na), arsenic (As), beryllium (Be), bismuth (Bi), cadmium (Cd), indium (In), lithium (Li), manganese (Mn), molybdenum (Mo), niobium (Nb), phosphorus (P), scandium (Sc), thallium (Tl), tungsten (W), and zinc (Zn).
  5. How consistent are the relationships among the observations, including topology?
    No formal logical consistency tests were conducted.

How can someone get a copy of the data set?

Are there legal restrictions on access or use of the data?
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.
  1. Who distributes the data set? (Distributor 1 of 1)
    U.S. Geological Survey - ScienceBase
    Denver Federal Center, Building 810, Mail Stop 302
    Denver, CO

    1-888-275-8747 (voice)
    sciencebase@usgs.gov
  2. What's the catalog number I need to order this data set? These data are available in csv format (SanFranciscoBayandTributaryGeochemistry.csv) contained in a single zip file, which also includes CSDGM FGDC-compliant metadata.
  3. What legal disclaimers am I supposed to read?
    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.
  4. How can I download or order the data?
  5. What hardware or software do I need in order to use the data set?
    These data can be viewed with any text reader.

Who wrote the metadata?

Dates:
Last modified: 25-Jul-2023
Metadata author:
U.S. Geological Survey, Pacific Coastal and Marine Science Center
Attn: PCMSC Science Data Coordinator
2885 Mission Street
Santa Cruz, CA

831-427-4747 (voice)
pcmsc_data@usgs.gov
Metadata standard:
Content Standard for Digital Geospatial Metadata (FGDC-STD-001-1998)
This page is <https://cmgds.marine.usgs.gov/catalog/pcmsc/DataReleases/ScienceBase/DR_P9CH2ZWD/SanFranciscoBayandTributaryGeochemistry_metadata.faq.html>
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