Geophysical properties, geochronologic, and geochemical data of sediment cores collected from San Pablo Bay, California, October 17-20, 2016

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What does this data set describe?

1. How might this data set be cited?
   Takesue, Renee K., McGann, Mary L., Lorenson, Thomas D., and Watt, Janet T., 20211015, Geophysical properties, geochronologic, and geochemical data of sediment cores collected from San Pablo Bay, California, October 17-20, 2016: data release DOI:10.5066/P9BDEB3K, U.S. Geological Survey, Pacific Coastal and Marine Science Center, Santa Cruz, California.

   Online Links:

   • https://doi.org/10.5066/P9BDEB3K
   • https://www.sciencebase.gov/catalog/item/60edab1ad34e48f871733fec

2. What geographic area does the data set cover?

   West_Bounding_Coordinate: -122.4576
   East_Bounding_Coordinate: -122.3177
   North_Bounding_Coordinate: 38.1012
   South_Bounding_Coordinate: 38.0362
   

3. What does it look like?

   https://www.sciencebase.gov/catalog/item/60edab1ad34e48f871733fec?name=SP_cores_all.jpg (JPEG)

   Map showing locations of cores collected (yellow circles) and fault lines (red) in San Pablo Bay.

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

   Beginning_Date: 17-Oct-2016

   Ending_Date: 20-Oct-2016

   Currentness_Reference:

   ground condition at time data were collected

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 (953)
   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 0.0001. Longitudes are given to the nearest 0.0001. 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?

   Attribute table

   A comma-delimited text file with the first line being a header line. Abbreviations: n.d., not determined; <, below limit of determination; QC, did not satisfy quality control criteria. (Source: Producer defined)

   Core_ID

   Unique identifier assigned to each core based on the two-digit collection year (16, 2016), location (spb, San Pablo Bay), and sequential collection number. (Source: Producer defined) Unique alphanumeric sample identifier

   Date_Collected

   Date the sediment core was collected (Source: Producer defined)

   Range of values
   Minimum:	2016-10-17
   Maximum:	2016-10-20

   Latitude

   Latitude where the sediment core was collected (Source: Producer defined)

   Range of values
   Minimum:	38.0362
   Maximum:	38.1012
   Units:	decimal degrees
   Resolution:	0.0001

   Longitude

   Longitude where the sediment core was collected (Source: Producer defined)

   Range of values
   Minimum:	-122.4576
   Maximum:	-122.3177
   Units:	decimal degrees
   Resolution:	0.0001

   Water_Depth

   Water depth when the sediment core was collected (Source: Producer defined)

   Range of values
   Minimum:	2.42
   Maximum:	10.26
   Units:	meters
   Resolution:	0.01

   Sample_depth

   Bottom of 1-cm-thick sample intervals for geophysical (core logger) data or midpoint of 2-cm-thick sample intervals for geochronological and geochemical data, in centimeters (Source: Producer defined)

   Range of values
   Minimum:	1
   Maximum:	371
   Units:	centimeters

   Radiocarbon_NOSAMS_Accession_Number

   Unique identifier assigned to each sample by the National Ocean Sciences Accelerator Mass Spectrometry (NOSAMS) facility. n.d., not determined. (Source: Producer defined) Unique alphanumeric sample identifier

   Radiocarbon_Material_Dated

   Biological specimen type. n.d., not determined. (Source: Producer defined)

   Value	Definition
   mollusks	mollusk shell fragments
   benthic_foraminifera	tests of benthic foraminifera
   plant_wood	woody organic matter debris

   Radiocarbon_Sample_Weight

   Weight of radiocarbon sample measured. n.d., not determined. (Source: Producer defined)

   Range of values
   Minimum:	2.69
   Maximum:	178.80
   Units:	milligrams
   Resolution:	0.01

   Radiocarbon_Fraction_Modern

   Deviation of the delta-Carbon-14/delta-Carbon-12 ratio of a sample from modern carbon (Stuiver and Polach, 1977; Stuiver, 1980). n.d., not determined. (Source: Defined in Stuiver and Polach (1977) and Stuiver (1980))

   Range of values
   Minimum:	0.5599
   Maximum:	0.9832
   Units:	unitless
   Resolution:	0.0001

   Radiocarbon_Fraction_Modern_Error

   Error in the deviation of the delta-Carbon-14/delta-Carbon-12 ratio of a sample from modern carbon (Stuiver and Polach, 1977; Stuiver, 1980). n.d., not determined. (Source: defined in Stuiver and Polach (1977) and Stuiver (1980))

   Range of values
   Minimum:	0.0015
   Maximum:	0.0029
   Units:	unitless
   Resolution:	0.0001

   Radiocarbon_Conv_Age

   Conventional (Conv) Age in years before present (BP) calculated using the radiocarbon decay equation (Stuiver and Polach, 1977; Stuiver, 1980). BP is 1950. n.d., not determined. (Source: defined in Stuiver and Polach (1977) and Stuiver (1980).)

   Range of values
   Minimum:	135
   Maximum:	4660
   Units:	years before present (BP)
   Resolution:	5

   Radiocarbon_Conv_Age_Error

   Standard error of the Conventional (Conv) Age, in years before present (BP). BP is 1950. n.d., not determined. (Source: Producer defined)

   Range of values
   Minimum:	15
   Maximum:	30
   Units:	years before present (BP)
   Resolution:	5

   d13C

   del-Carbon-13 (d13C) is a measure of the ratio of stable isotopes Carbon-13 to Carbon-12, reported in parts per thousand (per mil). n.d., not determined. (Source: Producer defined)

   Range of values
   Minimum:	-28.58
   Maximum:	-0.76
   Units:	parts per thousand (per mil)
   Resolution:	0.01

   Delta_14C

   The relative difference between the absolute international standard (base year 1950) and sample activity corrected for age and d13C. n.d., not determined. (Source: defined in Stuiver and Polach (1977))

   Range of values
   Minimum:	-444.52
   Maximum:	-24.65
   Units:	parts per thousand (per mil)
   Resolution:	0.01

   Radiocarbon_dR

   The value of the regional deviation from the ocean reservoir age as defined by Ingram and Southon (1996) in years before present (BP). BP is 1950. n.d., not determined. (Source: Producer defined)

   Range of values
   Minimum:	0
   Maximum:	22
   Units:	years BP
   Resolution:	1

   Radiocarbon_dR_Error

   Error in the value of the regional deviation from the ocean reservoir age as defined by Ingram and Southon (1996) in years before present (BP). BP is 1950. n.d., not determined. (Source: Producer defined)

   Range of values
   Minimum:	0
   Maximum:	0.5
   Units:	years BP
   Resolution:	0.5

   Radiocarbon_Calib_Age

   Median of the 2-sigma range of Calibrated (Calib) ages calculated using CALIB 8.1 software (Heaton and others, 2020) in years anno Domini (AD) and before Christ (BC). Modern, greater than 1950; n.d., not determined. (Source: defined in Heaton and others (2020)) Alphanumeric date consisting of a numerical year and calendar abbreviation

   Radiocarbon_Calib_Age_Error

   Calibration (Calib) Age error calculated using CALIB 8.1 software (Heaton and others, 2020), in years. n.d., not determined. (Source: defined in Heaton and others (2020))

   Range of values
   Minimum:	26
   Maximum:	35
   Units:	years
   Resolution:	1

   P-wave_veolcity

   P-wave (primary wave) velocity, calculated. n.d., not determined. (Source: Producer defined)

   Range of values
   Minimum:	1151.535
   Maximum:	2472.207
   Units:	meters per second
   Resolution:	0.001

   Gamma-ray_Density

   gamma ray density, calculated. n.d., not determined. (Source: Producer defined)

   Range of values
   Minimum:	-0.3109
   Maximum:	1.6829
   Units:	grams per centimeter
   Resolution:	0.0001

   Magnetic_Susceptibility

   uncorrected magnetic susceptibility in 10exp-8 SI dimensionless units. n.d., not determined. (Source: Producer defined)

   Range of values
   Minimum:	-2937.8960
   Maximum:	2540.5160
   Units:	dimensionless
   Resolution:	0.0001

   Total_Lead-210_activity

   Activity of supported and unsupported Lead-210. n.d., not determined. (Source: Producer defined)

   Range of values
   Minimum:	0.4
   Maximum:	3.1
   Units:	disintegrations per minute per gram (dpm per g)
   Resolution:	0.1

   Total_Lead-210_uncertainty

   Measurement uncertainty of Total Lead-210 activity estimated from: detector efficiency, background correction, and one standard deviation of the counting error. n.d., not determined. (Source: Producer defined)

   Range of values
   Minimum:	0.3
   Maximum:	1.0
   Units:	disintegrations per minute per gram (dpm per g)
   Resolution:	0.1

   Radium-226_activity

   Activity of Radium-226; n.d., not determined (Source: Producer defined)

   Range of values
   Minimum:	1.1
   Maximum:	2.2
   Units:	disintegrations per minute per gram (dpm per g)
   Resolution:	0.1

   Radium-226_uncertainty

   Measurement uncertainty of Radium-226 activity estimated from: detector efficiency, background correction, and one standard deviation of the counting error. n.d., not determined (Source: Producer defined)

   Range of values
   Minimum:	0.1
   Maximum:	0.2
   Units:	disintegrations per minute per gram (dpm per g)
   Resolution:	0.1

   Excess_Lead-210_activity

   Activity of unsupported, or excess, Lead-210. n.d., not determined (Source: Producer defined)

   Range of values
   Minimum:	-1.5
   Maximum:	1.9
   Units:	disintegrations per minute per gram (dpm per g)
   Resolution:	0.1

   Excess_Lead-210_uncertainty

   Measurement uncertainty of excess Lead-210 activity estimated from: detector efficiency, background correction, and one standard deviation of the counting error. n.d., not determined (Source: Producer defined)

   Range of values
   Minimum:	0.3
   Maximum:	1.0
   Units:	disintegrations per minute per gram (dpm per g)
   Resolution:	0.1

   Cesium-137_activity

   Activity of Cesium-137. n.d., not determined (Source: Producer defined)

   Range of values
   Minimum:	0.0
   Maximum:	0.3
   Units:	disintegrations per minute per gram (dpm per g)
   Resolution:	0.1

   Cesium-137_uncertainty

   Measurement uncertainty of Cesium-137 activity estimated from: detector efficiency, background correction, and one standard deviation of the counting error. n.d., not determined (Source: Producer defined)

   Range of values
   Minimum:	0.0
   Maximum:	0.2
   Units:	disintegrations per minute per gram (dpm per g)
   Resolution:	0.1

   Total_Organic_Carbon

   Total organic carbon (TOC) content of bulk sediment. n.d., not determined (Source: Producer defined)

   Range of values
   Minimum:	0.688
   Maximum:	1.647
   Units:	weight percent (wt%)
   Resolution:	0.001

   Total_Hg_content

   Total mercury (Hg) content of fine sediment determined by cold vapor atomic absorption (CVAA). n.d., not determined (Source: Producer defined)

   Range of values
   Minimum:	0.043
   Maximum:	0.413
   Units:	milligrams per kilogram (mg/kg)
   Resolution:	0.001

   Aluminum_content

   Aluminum (Al) content of fine sediment digested by sodium peroxide fusion. n.d., not determined (Source: Producer defined)

   Range of values
   Minimum:	6.90
   Maximum:	9.58
   Units:	weight percent (wt%)
   Resolution:	0.01

   Calcium_content

   Calcium (Ca) content of fine sediment digested by sodium peroxide fusion. n.d., not determined (Source: Producer defined)

   Range of values
   Minimum:	0.69
   Maximum:	1.53
   Units:	weight percent (wt%)
   Resolution:	0.01

   Iron_content

   Iron (Fe) content of fine sediment digested by sodium peroxide fusion. n.d., not determined (Source: Producer defined)

   Range of values
   Minimum:	3.78
   Maximum:	5.08
   Units:	weight percent (wt%)
   Resolution:	0.01

   Potassium_content

   Potassium (K) content of fine sediment digested by sodium peroxide fusion. n.d., not determined (Source: Producer defined)

   Range of values
   Minimum:	1.29
   Maximum:	1.50
   Units:	weight percent (wt%)
   Resolution:	0.01

   Magnesium_content

   Magnesium (Mg) content of fine sediment digested by sodium peroxide fusion. n.d., not determined (Source: Producer defined)

   Range of values
   Minimum:	1.18
   Maximum:	1.74
   Units:	weight percent (wt%)
   Resolution:	0.01

   Sodium_content

   Sodium (Na) content of fine sediment digested with four acids. n.d., not determined (Source: producer defined)

   Range of values
   Minimum:	1.31
   Maximum:	2.41
   Units:	weight percent (wt%)
   Resolution:	0.01

   Sulfur_content

   Sulfur (S) content of fine sediment digested by sodium peroxide fusion. n.d., not determined (Source: producer defined)

   Range of values
   Minimum:	0.2
   Maximum:	0.9
   Units:	weight percent (wt%)
   Resolution:	0.1

   Silicon_content

   Silicon (Si) content of fine sediment digested by sodium peroxide fusion. n.d., not determined (Source: producer defined)

   Range of values
   Minimum:	24.1
   Maximum:	29.0
   Units:	weight percent (wt%)
   Resolution:	0.1

   Titanium_content

   Titanium (Ti) content of fine sediment digested by sodium peroxide fusion. n.d., not determined (Source: producer defined)

   Range of values
   Minimum:	0.40
   Maximum:	0.48
   Units:	weight percent (wt%)
   Resolution:	0.01

   Silver_content

   Silver (Ag) content of fine sediment digested with four acids. n.d., not determined (Source: producer defined)

   Range of values
   Minimum:	0.19
   Maximum:	0.51
   Units:	milligrams per kilogram (mg/kg)
   Resolution:	0.01

   Arsenic_content

   Arsenic (As) content of fine sediment digested with four acids. n.d., not determined (Source: producer defined)

   Range of values
   Minimum:	8.3
   Maximum:	22.5
   Units:	milligrams per kilogram (mg/kg)
   Resolution:	0.1

   Barium_content

   Barium (Ba) content of fine sediment digested with four acids. n.d., not determined (Source: producer defined)

   Range of values
   Minimum:	415
   Maximum:	495
   Units:	milligrams per kilogram (mg/kg)
   Resolution:	1

   Beryllium_content

   Beryllium (Be) content of fine sediment digested with four acids. n.d., not determined (Source: producer defined)

   Range of values
   Minimum:	1.15
   Maximum:	1.68
   Units:	milligrams per kilogram (mg/kg)
   Resolution:	0.01

   Bismuth_content

   Bismuth (Bi) content of fine sediment digested with four acids. n.d., not determined (Source: producer defined)

   Range of values
   Minimum:	0.12
   Maximum:	0.32
   Units:	milligrams per kilogram (mg/kg)
   Resolution:	0.01

   Cadmium_content

   Cadmium (Cd) content of fine sediment digested with four acids. n.d., not determined (Source: producer defined)

   Range of values
   Minimum:	0.04
   Maximum:	0.46
   Units:	milligrams per kilogram (mg/kg)
   Resolution:	0.01

   Cerium_content

   Cerium (Ce) content of fine sediment digested by sodium peroxide fusion. n.d., not determined (Source: producer defined)

   Range of values
   Minimum:	34.6
   Maximum:	47.9
   Units:	milligrams per kilogram (mg/kg)
   Resolution:	0.1

   Cobalt_content

   Cobalt (Co) content of fine sediment digested with four acids. n.d., not determined (Source: producer defined)

   Range of values
   Minimum:	12.1
   Maximum:	21.8
   Units:	milligrams per kilogram (mg/kg)
   Resolution:	0.1

   Chromium_content

   Chromium (Cr) content of fine sediment digested by sodium peroxide fusion. n.d., not determined (Source: Producer defined)

   Range of values
   Minimum:	163
   Maximum:	235
   Units:	milligrams per kilogram (mg/kg)
   Resolution:	1

   Cesium_content

   Cesium (Cs) content of fine sediment digested with four acids. n.d., not determined (Source: producer defined)

   Range of values
   Minimum:	3.24
   Maximum:	4.29
   Units:	milligrams per kilogram (mg/kg)
   Resolution:	0.01

   Copper_content

   Copper (Cu) content of fine sediment digested with four acids. n.d., not determined (Source: producer defined)

   Range of values
   Minimum:	23.9
   Maximum:	68.0
   Units:	milligrams per kilogram (mg/kg)
   Resolution:	0.1

   Dysprosium_content

   Dysprosium (Dy) content of fine sediment digested by sodium peroxide fusion. n.d., not determined (Source: Producer defined)

   Range of values
   Minimum:	3.03
   Maximum:	4.04
   Units:	milligrams per kilogram (mg/kg)
   Resolution:	0.01

   Erbium_content

   Erbium (Er) content of fine sediment digested by sodium peroxide fusion. n.d., not determined (Source: Producer defined)

   Range of values
   Minimum:	1.65
   Maximum:	2.37
   Units:	milligrams per kilogram (mg/kg)
   Resolution:	0.01

   Europium_content

   Europium (Eu) content of fine sediment digested by sodium peroxide fusion. n.d., not determined (Source: Producer defined)

   Range of values
   Minimum:	0.85
   Maximum:	8.26
   Units:	milligrams per kilogram (mg/kg)
   Resolution:	0.01

   Gallium_content

   Gallium (Ga) content of fine sediment digested with four acids. n.d., not determined (Source: producer defined)

   Range of values
   Minimum:	13.9
   Maximum:	20.3
   Units:	milligrams per kilogram (mg/kg)
   Resolution:	0.1

   Gadolinium_content g

   Gadolinium (Gd) content of fine sediment digested by sodium peroxide fusion. n.d., not determined (Source: Producer defined)

   Range of values
   Minimum:	3.18
   Maximum:	4.35
   Units:	milligrams per kilogram (mg/kg)
   Resolution:	0.01

   Hafnium_content

   Hafnium (Hf) content of fine sediment digested by sodium peroxide fusion. n.d., not determined (Source: Producer defined)

   Range of values
   Minimum:	3
   Maximum:	6
   Units:	milligrams per kilogram (mg/kg)
   Resolution:	1

   Holmium_content

   Holmium (Ho) content of fine sediment digested by sodium peroxide fusion. n.d., not determined (Source: Producer defined)

   Range of values
   Minimum:	0.56
   Maximum:	0.80
   Units:	milligrams per kilogram (mg/kg)
   Resolution:	0.01

   Indium_content

   Indium (In) content of fine sediment digested with four acids. n.d., not determined (Source: producer defined)

   Range of values
   Minimum:	0.039
   Maximum:	0.087
   Units:	milligrams per kilogram (mg/kg)
   Resolution:	0.001

   Lanthanum_content

   Lanthanum (La) content of fine sediment digested by sodium peroxide fusion. n.d., not determined (Source: Producer defined)

   Range of values
   Minimum:	17.2
   Maximum:	24.4
   Units:	milligrams per kilogram (mg/kg)
   Resolution:	0.1

   Lithium_content

   Lithium (Li) content of fine sediment digested with four acids. n.d., not determined (Source: producer defined)

   Range of values
   Minimum:	38.3
   Maximum:	58.1
   Units:	milligrams per kilogram (mg/kg)
   Resolution:	0.1

   Lutetium_content

   Lutetium (Lu) content of fine sediment digested by sodium peroxide fusion. n.d., not determined (Source: Producer defined)

   Range of values
   Minimum:	0.26
   Maximum:	0.35
   Units:	milligrams per kilogram (mg/kg)
   Resolution:	0.01

   Manganese_content

   Manganese (Mn) content of fine sediment digested with four acids. n.d., not determined (Source: producer defined)

   Range of values
   Minimum:	365
   Maximum:	843
   Units:	milligrams per kilogram (mg/kg)
   Resolution:	1

   Molybdenum_content

   Molybdenum (Mo) content of fine sediment digested with four acids. n.d., not determined (Source: producer defined)

   Range of values
   Minimum:	0.52
   Maximum:	2.07
   Units:	milligrams per kilogram (mg/kg)
   Resolution:	0.01

   Niobium_content

   Niobium (Nb) content of fine sediment digested with four acids. n.d., not determined (Source: producer defined)

   Range of values
   Minimum:	6.7
   Maximum:	9.9
   Units:	milligrams per kilogram (mg/kg)
   Resolution:	0.1

   Neodymium_content

   Neodymium (Nd) content of fine sediment digested by sodium peroxide fusion. n.d., not determined (Source: Producer defined)

   Range of values
   Minimum:	16.2
   Maximum:	22.6
   Units:	milligrams per kilogram (mg/kg)
   Resolution:	0.1

   Nickel_content

   Nickel (Ni) content of fine sediment digested by sodium peroxide fusion. n.d., not determined (Source: producer defined)

   Range of values
   Minimum:	80
   Maximum:	114
   Units:	milligrams per kilogram (mg/kg)
   Resolution:	1

   Phosphorus_content

   Phosphorus (P) content of fine sediment digested with four acids. n.d., not determined (Source: producer defined)

   Range of values
   Minimum:	561
   Maximum:	957
   Units:	milligrams per kilogram (mg/kg)
   Resolution:	1

   Lead_content

   Lead (Pb) content of fine sediment digested with four acids. n.d., not determined (Source: producer defined)

   Range of values
   Minimum:	8.9
   Maximum:	30.2
   Units:	milligrams per kilogram (mg/kg)
   Resolution:	0.1

   Praseodymium_content

   Praseodymium (Pr) content of fine sediment digested by sodium peroxide fusion. n.d., not determined (Source: Producer defined)

   Range of values
   Minimum:	4.15
   Maximum:	5.65
   Units:	milligrams per kilogram (mg/kg)
   Resolution:	0.01

   Rubidium_content

   Rubidium (Rb) content of fine sediment digested with four acids. n.d., not determined (Source: producer defined)

   Range of values
   Minimum:	56.0
   Maximum:	68.4
   Units:	milligrams per kilogram (mg/kg)
   Resolution:	0.1

   Antimony_content

   Antimony (Sb) content of content of fine sediment digested by sodium peroxide fusion. n.d., not determined (Source: producer defined)

   Range of values
   Minimum:	0.3
   Maximum:	1.5
   Units:	milligrams per kilogram (mg/kg)
   Resolution:	0.1

   Scandium_content

   Scandium (Sc) content of fine sediment digested with four acids. n.d., not determined (Source: producer defined)

   Range of values
   Minimum:	14.6
   Maximum:	23.5
   Units:	milligrams per kilogram (mg/kg)
   Resolution:	0.1

   Selenium_content

   Selenium (Se) content of fine sediment digested with four acids. QC, value did not meet quality control criteria; n.d., not determined (Source: producer defined)

   Range of values
   Minimum:	0.7
   Maximum:	1.2
   Units:	milligrams per kilogram (mg/kg)
   Resolution:	0.1

   Samarium_content

   Samarium (Sm) content of fine sediment digested by sodium peroxide fusion. n.d., not determined (Source: Producer defined)

   Range of values
   Minimum:	3.4
   Maximum:	4.6
   Units:	milligrams per kilogram (mg/kg)
   Resolution:	0.1

   Tin_content

   Tin (Sn) content of fine sediment digested with four acids. n.d., not determined (Source: Producer defined)

   Range of values
   Minimum:	1.1
   Maximum:	9.2
   Units:	milligrams per kilogram (mg/kg)
   Resolution:	0.1

   Strontium_content

   Strontium (Sr) content of fine sediment digested by sodium peroxide fusion. n.d., not determined (Source: producer defined)

   Range of values
   Minimum:	106
   Maximum:	204
   Units:	milligrams per kilogram (mg/kg)
   Resolution:	1

   Tantalum_content

   Tantalum (Ta) content of fine sediment digested by sodium peroxide fusion. <, below limit of determination; n.d., not determined (Source: producer defined)

   Range of values
   Minimum:	<0.5
   Maximum:	0.6
   Units:	milligrams per kilogram (mg/kg)
   Resolution:	0.1

   Terbium_content

   Terbium (Tb) content of fine sediment digested by sodium peroxide fusion. n.d., not determined (Source: Producer defined)

   Range of values
   Minimum:	0.49
   Maximum:	0.69
   Units:	milligrams per kilogram (mg/kg)
   Resolution:	0.01

   Tellurium_content

   Tellurium (Te) content of fine sediment digested with four acids. <, below limit of determination; n.d., not determined (Source: Producer defined)

   Range of values
   Minimum:	<0.01
   Maximum:	0.16
   Units:	milligrams per kilogram (mg/kg)
   Resolution:	0.01

   Thorium_content

   Thorium (Th) content of fine sediment digested by sodium peroxide fusion. n.d., not determined (Source: Producer defined)

   Range of values
   Minimum:	5.5
   Maximum:	9.0
   Units:	milligrams per kilogram (mg/kg)
   Resolution:	0.1

   Thallium_content

   Thallium (Tl) content of fine sediment digested with four acids. n.d., not determined (Source: producer defined)

   Range of values
   Minimum:	0.26
   Maximum:	0.38
   Units:	milligrams per kilogram (mg/kg)
   Resolution:	0.01

   Thulium_content

   Thulium (Tm) content of fine sediment digested by sodium peroxide fusion. n.d., not determined (Source: Producer defined)

   Range of values
   Minimum:	0.26
   Maximum:	0.38
   Units:	milligrams per kilogram (mg/kg)
   Resolution:	0.01

   Uranium_content

   Uranium (U) content of fine sediment digested by sodium peroxide fusion. n.d., not determined (Source: Producer defined)

   Range of values
   Minimum:	1.88
   Maximum:	2.82
   Units:	milligrams per kilogram (mg/kg)
   Resolution:	0.01

   Vanadium_content

   Vanadium (V) content of fine sediment digested with four acids. n.d., not determined (Source: producer defined)

   Range of values
   Minimum:	115
   Maximum:	190
   Units:	milligrams per kilogram (mg/kg)
   Resolution:	1

   Tungsten_content

   Tungsten (W) content of fine sediment digested with four acids. n.d., not determined (Source: producer defined)

   Range of values
   Minimum:	0.6
   Maximum:	2.2
   Units:	milligrams per kilogram (mg/kg)
   Resolution:	0.1

   Yttrium_content

   Yttrium (Y) content of fine sediment digested by sodium peroxide fusion. n.d., not determined (Source: Producer defined)

   Range of values
   Minimum:	16.3
   Maximum:	22.1
   Units:	milligrams per kilogram (mg/kg)
   Resolution:	0.1

   Ytterbium_content

   Ytterbium (Yb) content of fine sediment digested by sodium peroxide fusion. n.d., not determined (Source: Producer defined)

   Range of values
   Minimum:	1.9
   Maximum:	2.4
   Units:	milligrams per kilogram (mg/kg)
   Resolution:	0.1

   Zinc_content

   Zinc (Zn) content of fine sediment digested with four acids. n.d., not determined (Source: producer defined)

   Range of values
   Minimum:	69.1
   Maximum:	152.0
   Units:	milligrams per kilogram (mg/kg)
   Resolution:	0.1

   Zirconium_content

   Zirconium (Zr) content of fine sediment digested by sodium peroxide fusion. n.d., not determined (Source: Producer defined)

   Range of values
   Minimum:	119
   Maximum:	210
   Units:	milligrams per kilogram (mg/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
   • Mary L. McGann
   • Thomas D. Lorenson
   • Janet T. Watt
2. Who also contributed to the data set?
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?

Geophysical, geochronological, and geochemical data were used to characterize the timing and nature of recent deformation along the Hayward-Rodgers Creek fault system within northern San Pablo Bay. This work was funded by the USGS Coastal and Marine Hazards and Resources Program and the USGS San Francisco Bay-Delta Priority Ecosystem Science Program.

How was the data set created?

1. From what previous works were the data drawn?

   NOSAMS Radiocarbon Method (source 1 of 4)

   National Ocean Sciences Accelerator Mass Spectrometry (NOSAMS) facility, 2021, Radiocarbon analysis: NOSAMS, online.

   Online Links:

   • https://www2.whoi.edu/site/nosams/education-training/what-is-carbon-dating/
   • https://www.whoi.edu/nosams/Submitting_Guidelines
   • https://www2.whoi.edu/site/nosams/about/laboratory-capabilities/ams-instruments/

   Type_of_Source_Media: webpage
   Source_Contribution: Description of radiocarbon dating method and instrumentation.
   

   RGU-1 (source 2 of 4)

   International Atomic Energy Agency, 1987, IAEA-RGU-1, Uranium Ore Certified Reference Material: International Atomic Energy Agency, online.

   Online Links:

   • https://nucleus.iaea.org/sites/ReferenceMaterials/Pages/IAEA-RGU-1.aspx

   Type_of_Source_Media: online document
   Source_Contribution:

   The Certificate lists the certified properties for IAEA-RGU-1, their values, and estimated uncertainties.

   RGTh-1 (source 3 of 4)

   International Atomic Energy Agency, 1987, IAEA-RGTh-1, Thorium Ore Certified Reference Material: International Atomic Energy Agency, online.

   Online Links:

   • https://nucleus.iaea.org/sites/ReferenceMaterials/Pages/IAEA-RGTh-1.aspx

   Type_of_Source_Media: online document
   Source_Contribution:

   The Certificate lists the certified properties for IAEA-RGTh-1, their values, and estimated uncertainties.

   IAEA-300 (source 4 of 4)

   Ballestra, S., Gastaud, J., Lopez, J.J., Parsi, P., and Vas, D., 1994, Intercomparison of radionuclide measurements on marine sediment sample IAEA-300: International Atomic Energy Agency, online.

   Online Links:

   • https://inis.iaea.org/collection/NCLCollectionStore/_Public/35/066/35066057.pdf

   Type_of_Source_Media: online document
   Source_Contribution:

   The Certificate lists the certified properties for IAEA-300, their values, and estimated uncertainties.

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

   Date: 20-Oct-2016 (process 1 of 6)

   CORE COLLECTION: Sediment cores were collected with a Rossfelder P-5 vibracorer. Cores were cut into 150-centimeter-long sections.

   Date: 12-Nov-2019 (process 2 of 6)

   RADIOCARBON: Samples of 2-centimeter-thick intervals of sediment were taken from the cores. Data are reported at the midpoint depth of sampling intervals. The sediment samples were washed through stacked 450 micrometer, 150 micrometer, and 63 micrometer sieves to remove the less than 63 micrometer-sized sediment and to protect the finer sieves. The sediment remaining on the sieves was recombined, transferred to filter paper, left to air dry, and then placed in vials. The dried sediment was then spread out onto a picking tray and viewed under a microscope. Microscopic shells of mollusks, foraminifera, or plant/wood were removed with the aid of a picking brush or tweezers and placed into separate vials and weighed. These vials were then sent off for radiocarbon dating. Material was analyzed according to the NOSAMS Radiocarbon Method.

   Date: 07-Nov-2016 (process 3 of 6)

   GEOPHYSICAL PARAMETERS (CORE LOGGER): A Geotek Multi-Sensor Core Logger (MSCL) running Geotek MSCL software was used to measure P-wave velocity, gamma ray density, and magnetic susceptibility. Logging was performed on unsplit sediment cores at the USGS PCMSC Core Lab at 1-centimeter intervals from the top of each 150-centimeter-long section of core. The reference core thickness was 9.373 centimeters. Data are reported at the bottom of sampling intervals. P-wave (primary wave) velocity was measured through the core with an acoustic rolling contact (ARC) transducer using a stationary active transducer element that couples directly to the core liner. Measurements were calibrated using a short length of liner filled with distilled water and comparison to a standard velocity of distilled water at a given temperature. P-wave velocity is given in meters per second. The P-wave travel time offset (PTO) was 20.9. Measurements below 1480 meters per second (typical speed in seawater) or missing data values were the result of poor coupling with the core liner or air voids in the core. Anomalous values for P-wave velocity were not excluded from the data. Bulk density based on gamma-ray attenuation was measured with a Cesium-137 gamma-ray source and gamma detector mounted on the MSCL. Gamma-ray density measurements were calibrated using an aluminum calibration piece mounted inside a water-filled polycarbonate core liner with width (W)=0.486 centimeters. Gamma-ray density calibration parameters were A=-0.0003 and B=-0.0550. Gamma-ray density measurements below 0.1 grams per cubic centimeter or missing data values were the result of poor contact with the core sample or air voids at the logging location. Anomalous values for gamma-ray density were not excluded from the data. A 120 mm-diameter Bartington MS2C loop was used to measure magnetic susceptibility on whole cores. The sensor is electronically calibrated with a supplied stable iron standard, and calibration parameters were A=1, B=0. Magnetic susceptibility measurements were collected every 1 centimeter with 5 second dwell times. Data are reported as corrected magnetic susceptibility in 10exp-8 SI dimensionless units.

   Date: 08-Apr-2017 (process 4 of 6)

   SHORT-LIVED RADIONUCLIDE ACTIVITIES: 2-centimeter-thick intervals were subsampled from sediment cores for radionuclide determinations. Data are reported at the midpoint depth of sampling intervals. Prior to quantification by gamma spectrometry, bulk sediment was oven-dried at 60 degrees Celsius and ground to a homogeneous grain size. Short-lived radioisotopes were determined at the USGS Pacific Coastal and Marine Science Center (PCMSC) Radiochemistry Lab. Sediment packed into 10-milliliter polystyrene vials with air-tight caps and counted for 24 hours in a high-purity low-background germanium (HPGe) well detector. Unsupported Lead-210 activities were quantified by subtracting Lead-210 activities counted at the 46.52 keV peak from the average of supported Radium-226 activities counted indirectly at the Lead-214 351.9 keV peak and Bismuth-214 609.3 keV peak. Detector efficiencies for Lead-210 and Radium-226 were determined using IAEA standards RGU-1 and RGTh-1. Cesium-137 activities were counted at the 661.6 keV peak. Detector efficiency for Cesium-137 was determined using International Atomic Energy Agency (IAEA) Standard Reference Material 300.

   Date: 23-Sep-2019 (process 5 of 6)

   TOTAL ORGANIC CARBON CONTENT (TOC): 2-centimeter-thick intervals were subsampled from sediment cores for TOC determinations. Data are reported at the midpoint depth of sampling intervals. TOC was calculated as the difference between total carbon and total inorganic carbon contents of bulk sediment which were determined coulometrically (UIC, Inc.) at the USGS Pacific Coastal and Marine Science Center Sediment Laboratory. Samples were run in duplicate. Average values are reported. Coulometer performance was verified relative to a calcium carbonate reference material. Person who carried out this activity:
   

   Angela Tan

   USGS PCMSC

   Physical Scientist

   2885 Mission Street

   Santa Cruz, CA
   

   831-460-7409 (voice)

   atan@usgs.gov

   Date: 07-Feb-2019 (process 6 of 6)

   ELEMENT CONTENTS: 2-centimeter-thick intervals were subsampled from sediment cores for elemental determinations. Data are reported at the midpoint depth of sampling intervals. Sediment was oven dried at 60 degrees Celsius, gently disaggregated, and dry-sieved in stainless steel sieves to obtain the less than 0.063 millimeter-diameter (fine fraction) of sediment. Fine sediment was sent to the USGS Analytical Chemistry Project, which subcontracted AGAT Laboratories, a nationally accredited laboratory, for determinations of elemental compositions. Sediment was decomposed by two methods: a near-total four-acid digestion with low limits of determination, ideal for elements present at trace (part per million) levels, and a total digestion by sodium peroxide fusion that targeted elements in refractory minerals such as chromium, zirconium, and rare earth elements. Quantification was performed by inductively coupled plasma optical emission spectroscopy (ICP-OES) for major elements and inductively coupled plasma mass spectroscopy (ICP-MS) for minor and trace elements. Total mercury was measured by cold vapor atomic absorption spectroscopy (CVAAS). Geologic reference materials, internal standards, and consistency standards were used for calibration, quality assurance, and quality control. Person who carried out this activity:
   

   Jaime Azain

   USGS Geology, Geophysics, and Geochemistry Science Center

   Research Geologist

   Denver Federal Center, Building 20, MS 973

   Denver, C)
   

   303-236-9376 (voice)

   jsazain@usgs.gov

3. What similar or related data should the user be aware of?
   Stuiver, M., and Polach, H.A., 1977, Discussion reporting of 14C data.

   Online Links:

   • https://doi.org/10.1017/S0033822200003672

   Stuiver, M., 1980, Workshop on 14C data reporting.

   Online Links:

   • https://doi.org/10.1017/S0033822200010389

   Ingram, B.L., and Southon, J.R., 1996, Reservoir ages in eastern Pacific coastal and estuarine waters.

   Online Links:

   • https://doi.org/10.1017/S0033822200030101

   Heaton, T.J., Kohler, P., Butzin, M., Bard, E., Reimer, R.W., Austin, W.E.N., Ramsey, C. Bronk, Grootes, P.M., Hughen, K.A., Kromer, B., Reimer, P.J., Adkins, J., Burke, A., Cook, M.S., Olsen, J., and Skinner, L.C., 2020, The marine radiocarbon age calibration curve (0-55,000 ca BP).

   Online Links:

   • https://doi.org/10.1017/RDC.2020.68

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

1. How well have the observations been checked?
   GEOPHYSICAL PARAMETERS (CORE LOGGER): Quality control was conducted during the logging process and is described in the Process Steps. RADIOCARBON: All data were calibrated against known standards. Uncertainties are defined in Attribute Descriptions and reported in the data table. SHORT-LIVED RADIONUCLIDES: Activities were calculated by comparison to certified reference materials with the same geometry and counting time as samples. Reported uncertainties include 1 standard deviation counting errors, detector efficiency, and background corrections. TOTAL ORGANIC CARBON CONTENT: The average percent difference between two sets of lab duplicates was 6 percent. ELEMENT CONTENT OF SEDIMENT: Percent recoveries of all elements were within +/-15 percent of known standard values. Average percent differences of element contents in two lab duplicates ranged from 0 to 23 percent with a median of 3 percent (n=59). Terbium contents were below the limit of detection in lab duplicates so its reproducibility could not be assessed.
2. How accurate are the geographic locations?
   Position data were provided by Differential GPS (DGPS) with a stated accuracy of 1 to 3 centimeters.
3. How accurate are the heights or depths?
   
4. Where are the gaps in the data? What is missing?
   Dataset is considered complete for the information presented, as described in the abstract. Users are advised to read the rest of the metadata record carefully for additional details.
5. How consistent are the relationships among the observations, including topology?
   No formal logical accuracy 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 (USGS) as the originator 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 (SanPabloBayCoresOctober2016.csv) and are accompanied by 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?
   • Availability in digital form:

     Data format:	comma-delimited text Size: 0.2
     Network links:	https://www.sciencebase.gov/catalog/file/get/60edab1ad34e48f871733fec https://doi.org/10.5066/P9BDEB3K

   • Cost to order the data: None.

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: 15-Oct-2021

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)