Geochemical and isotopic compositions of stream sediment, parent rock, and nearshore sediment from southwest Puerto Rico, April 2017-June 2018

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What does this data set describe?

1. How might this data set be cited?
   Takesue, Renee K., 20190814, Geochemical and isotopic compositions of stream sediment, parent rock, and nearshore sediment from southwest Puerto Rico, April 2017-June 2018: data release DOI:10.5066/P9QEAV6O, U.S. Geological Survey, Pacific Coastal and Marine Science Center, Santa Cruz, California.

   Online Links:

   • https://doi.org/10.5066/P9QEAV6O
   • https://www.sciencebase.gov/catalog/item/5c7dcfece4b0fe48cb5333ad

2. What geographic area does the data set cover?

   West_Bounding_Coordinate: -67.0499
   East_Bounding_Coordinate: -66.3137
   North_Bounding_Coordinate: 18.1088
   South_Bounding_Coordinate: 17.8844
   

3. What does it look like?
4. Does the data set describe conditions during a particular time period?

   Beginning_Date: 06-Apr-2017

   Ending_Date: 14-Jun-2018

   Currentness_Reference:

   Stream sediment and bedrock were collected during April 2017 and June 2017. Nearshore trapped and seabed sediment was collected from May 2017 to June 2018.

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 (136)
   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

   Table of data. Abbreviations: n.d., not determined; ins, insufficient material; >, greater than; <, less than; QC, value did not meet quality control criteria. (Source: Producer defined)

   Sample I.D.

   Unique laboratory identifier assigned to each sample by the CMERSC Analytical Chemistry Laboratory (Source: Producer defined) Sequential sample identification numbers assigned by the CMERSC Analytical Chemistry Laboratory

   Field I.D.

   Sample identifier assigned during field collection based on location, basin, and/or type. (Source: Producer defined) Unique alphanumeric sample identifiers

   Sample type

   Type of sediment sample (Source: Producer defined)

   Value	Definition
   MAR	marine sample collected seaward of the shoreline
   ROC	bedrock
   TER	terrestrial sample collected at or landward of the shoreline

   Sample feature

   Geomorphic feature from which the sample was collected (Source: Producer defined)

   Value	Definition
   beach	intertidal zone
   bedrock	rock outcrop
   canal	agricultural irrigation canal
   reservoir	impounded water behind a dam
   seabed	seafloor
   stream	flowing freshwater body
   trap	an upward-opening tube-shaped sampler that traps sinking particles

   Collection date

   Date the sample was collected, in mm/dd/yy (Source: Producer defined)

   Range of values
   Minimum:	04/06/17
   Maximum:	06/14/18
   Units:	mm/dd/yy
   Resolution:	1

   Longitude

   Longitude where the sample was collected (Source: Producer defined)

   Range of values
   Minimum:	-66.3137
   Maximum:	-67.0499
   Units:	decimal degrees
   Resolution:	0.0001

   Latitude

   Latitude where the sample was collected (Source: Producer defined)

   Range of values
   Minimum:	17.8844
   Maximum:	18.1088
   Units:	decimal degrees
   Resolution:	0.0001

   Drainage name

   Geographic area or drainage basin in which sediment was collected (Source: Producer defined)

   Value	Definition
   Bucana	Rio Bucana watershed
   Coamo	Rio Coamo watershed
   Coral reef	Coral reef flat
   Descalabrado	Rio Descalabrado watershed
   Guanica Bay	Guanica Bay
   Guanica Bay offshore	Guanica Bay offshore
   Guayanilla	Rio Guayanilla watershed
   Inabon	Rio Inabon watershed
   Jacaguas	Rio Jacaguas watershed
   Lajas Valley	Lajas Valley drainage
   Lucchetti reservoir	Lake Lucchetti
   Macana	Rio Macana watershed
   Matilde	Rio Matilde watershed
   Portuges	Rio Portuges watershed
   Rio Loco	Rio Loco watershed
   Tallaboa	Rio Tallaboa watershed
   Yauco	Rio Yauco watershed

   Drainage abbreviation

   Abbreviation of area or stream name (Source: Producer defined)

   Value	Definition
   BUC	Rio Bucana
   COA	Rio Coamo
   DES	Rio Descalabrado
   GB	Guanica Bay
   GBO	Guanica Bay offshore
   GUY	Rio Guayanilla
   INA	Rio Inabon
   JAC	Rio Jacaguas
   LAJ	Lajas Valley
   LOC	Rio Loco
   LUC	Lake Lucchetti
   MAC	Rio Macana
   MAT	Rio Matilde
   POR	Rio Portuges
   REEF	Coral reef flat
   TAL	Rio Tallaboa
   YAU	Rio Yauco

   Median grain size, in millimeters

   Particle diameter at the midpoint of the grain size distribution. n.d.=not determined; ins=insufficient material (Source: Producer defined)

   Range of values
   Minimum:	0.002
   Maximum:	1.703
   Units:	millimeters
   Resolution:	0.001

   Percent fines

   Percentage by weight of particles less than 0.063 millimeters in diameter (fines). n.d.=not determined; ins=insufficient material (Source: Producer defined)

   Range of values
   Minimum:	1.256
   Maximum:	100.000
   Units:	percent
   Resolution:	0.001

   Silt to clay ratio

   Unitless quotient of the statistical grain size parameters percent silt divided by percent clay. n.d.=not determined; ins=insufficient material (Source: Producer defined)

   Range of values
   Minimum:	0.000
   Maximum:	5.537
   Units:	unitless
   Resolution:	0.001

   Carbonate content, in percent

   Percent by weight of calcium carbonate. n.d.=not determined; ins=insufficient material (Source: Producer defined)

   Range of values
   Minimum:	0.0
   Maximum:	96.0
   Units:	millimeters
   Resolution:	0.1

   Total organic carbon content, in percent

   Percent by weight of organic carbon. n.d.=not determined; ins=insufficient material (Source: Producer defined)

   Range of values
   Minimum:	0.1
   Maximum:	12.0
   Units:	millimeters
   Resolution:	0.1

   Beryllium-7 activity, in dpm per g

   Activity of Beryllium-7. n.d.=not determined; ins=insufficient material (Source: Producer defined)

   Range of values
   Minimum:	0.17
   Maximum:	9.22
   Units:	disintegrations per minute per gram (dpm per g)
   Resolution:	0.01

   Beryllium-7 activity error, in dpm per g

   Measurement uncertainty of Beryllium-7 activity estimated from: detector efficiency, background correction, and one standard deviation of the counting error. n.d.=not determined; ins=insufficient material (Source: Producer defined)

   Range of values
   Minimum:	0.16
   Maximum:	1.73
   Units:	disintegrations per minute per gram (dpm per g)
   Resolution:	0.01

   Excess Lead-210 activity, in dpm per g

   Activity of Lead-210. n.d.=not determined; ins=insufficient material (Source: Producer defined)

   Range of values
   Minimum:	2.62
   Maximum:	22.78
   Units:	disintegrations per minute per gram (dpm per g)
   Resolution:	0.01

   Excess Lead-210 activity error, in dpm per g

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

   Range of values
   Minimum:	0.20
   Maximum:	0.63
   Units:	disintegrations per minute per gram (dpm per g)
   Resolution:	0.01

   Cesium-137 activity, in dpm per g. n.d.=not determined; ins=insufficient material

   Activity of Cesium-137 (Source: Producer defined)

   Range of values
   Minimum:	0.00
   Maximum:	0.06
   Units:	disintegrations per minute per gram (dpm per g)
   Resolution:	0.01

   Cesium-137 activity error, in dpm per g

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

   Range of values
   Minimum:	0.00
   Maximum:	0.03
   Units:	disintegrations per minute per gram (dpm per g)
   Resolution:	0.01

   Thorium-234 activity, in dpm per g

   Activity of Thorium-234. n.d.=not determined; ins=insufficient material (Source: Producer defined)

   Range of values
   Minimum:	1.13
   Maximum:	23.49
   Units:	disintegrations per minute per gram (dpm per g)
   Resolution:	0.01

   Thorium-234 activity error, in dpm per g

   Measurement uncertainty of Thorium-234 activity estimated from: detector efficiency, background correction, and one standard deviation of the counting error. n.d.=not determined; ins=insufficient material (Source: Producer defined)

   Range of values
   Minimum:	0.13
   Maximum:	0.62
   Units:	disintegrations per minute per gram (dpm per g)
   Resolution:	0.01

   87/86 Strontium ratio

   Ratio of Strontium-87 to Strontium-86. n.d.=not determined; ins=insufficient material (Source: Producer defined)

   Range of values
   Minimum:	0.703584
   Maximum:	0.708699
   Units:	unitless
   Resolution:	0.000001

   87/86 Strontium ratio error

   1 standard deviation uncertainty of the Stronitum Isotope Ratio measurement. n.d.=not determined; ins=insufficient material (Source: Producer defined)

   Range of values
   Minimum:	0.000001
   Maximum:	0.352576
   Units:	unitless
   Resolution:	0.000001

   Al2O3, in %

   Aluminum oxide content in units of weight percent (%). n.d.=not determined (Source: Producer defined)

   Range of values
   Minimum:	0.37
   Maximum:	19.20
   Units:	percent
   Resolution:	0.01

   BaO, in %

   Barium oxide content in units of weight percent (%). n.d.=not determined (Source: Producer defined)

   Range of values
   Minimum:	<0.01
   Maximum:	0.34
   Units:	percent
   Resolution:	0.01

   CaO, in %

   Calcium oxide content in units of weight percent (%). n.d.=not determined (Source: Producer defined)

   Range of values
   Minimum:	0.64
   Maximum:	54.60
   Units:	percent
   Resolution:	0.01

   Cr2O3, in %

   Chromium oxide content in units of weight percent (%). n.d.=not determined (Source: Producer defined)

   Range of values
   Minimum:	<0.01
   Maximum:	0.41
   Units:	percent
   Resolution:	0.01

   Fe2O3, in %

   Iron oxide content in units of weight percent (%). n.d.=not determined (Source: Producer defined)

   Range of values
   Minimum:	0.24
   Maximum:	11.40
   Units:	percent
   Resolution:	0.01

   K2O, in %

   Potassium oxide content in units of weight percent (%). n.d.=not determined (Source: Producer defined)

   Range of values
   Minimum:	0.02
   Maximum:	5.37
   Units:	percent
   Resolution:	0.01

   MgO, in %

   Magnesium oxide content in units of weight percent (%). n.d.=not determined (Source: Producer defined)

   Range of values
   Minimum:	0.46
   Maximum:	36.80
   Units:	percent
   Resolution:	0.01

   MnO, in %

   Manganese oxide content in units of weight percent (%). n.d.=not determined (Source: Producer defined)

   Range of values
   Minimum:	0.01
   Maximum:	0.38
   Units:	percent
   Resolution:	0.01

   Na2O, in %

   Sodium oxide content in units of weight percent (%). n.d.=not determined (Source: Producer defined)

   Range of values
   Minimum:	<0.01
   Maximum:	5.39
   Units:	percent
   Resolution:	0.01

   P2O5, in %

   Phosphorus pentoxide content in units of weight percent (%). n.d.=not determined (Source: Producer defined)

   Range of values
   Minimum:	<0.01
   Maximum:	0.44
   Units:	percent
   Resolution:	0.01

   SiO2, in %

   Silicon dioxide content in units of weight percent (%). n.d.=not determined (Source: Producer defined)

   Range of values
   Minimum:	1.16
   Maximum:	66.80
   Units:	percent
   Resolution:	0.01

   SrO, in %

   Strontium oxide content in units of weight percent (%). n.d.=not determined (Source: Producer defined)

   Range of values
   Minimum:	<0.01
   Maximum:	0.57
   Units:	percent
   Resolution:	0.01

   TiO2, in %

   Titanium dioxide content in units of weight percent (%). n.d.=not determined (Source: Producer defined)

   Range of values
   Minimum:	0.02
   Maximum:	1.30
   Units:	percent
   Resolution:	0.01

   V2O5, in %

   Vanadium pentoxide content in units of weight percent (%). n.d.=not determined (Source: Producer defined)

   Range of values
   Minimum:	<0.01
   Maximum:	0.06
   Units:	percent
   Resolution:	0.01

   Al by fusion, in %

   Aluminum (Al) content of fused, digested sediment in units of weight percent (%) (Source: Producer defined)

   Range of values
   Minimum:	0.22
   Maximum:	10.40
   Units:	weight percent (%)
   Resolution:	0.01

   Ca by fusion, in %

   Calcium (Ca) content of fused, digested sediment in units of weight percent (%) (Source: Producer defined)

   Range of values
   Minimum:	0.51
   Maximum:	39.20
   Units:	weight percent (%)
   Resolution:	0.01

   Fe by fusion, in %

   Iron (Fe) content of fused, digested sediment in units of weight percent (%) (Source: Producer defined)

   Range of values
   Minimum:	0.14
   Maximum:	8.46
   Units:	weight percent (%)
   Resolution:	0.01

   K by fusion, in %

   Potassium (K) content of fused, digested sediment in units of weight percent (%) (Source: Producer defined)

   Range of values
   Minimum:	0.02
   Maximum:	4.92
   Units:	weight percent (%)
   Resolution:	0.01

   Mg by fusion, in %

   Magnesium (Mg) content of fused, digested sediment in units of weight percent (%) (Source: Producer defined)

   Range of values
   Minimum:	0.26
   Maximum:	20.50
   Units:	weight percent (%)
   Resolution:	0.01

   Na by multi-acid, in %

   Sodium (Na) content of multi-acid digested sediment in units of weight percent (%) (Source: producer defined)

   Range of values
   Minimum:	0.01
   Maximum:	>10
   Units:	weight percent (%)
   Resolution:	0.01

   S by fusion, in %

   Sulfur (S) content of fused, digested sediment in units of weight percent (%) (Source: producer defined)

   Range of values
   Minimum:	<0.1
   Maximum:	1.7
   Units:	weight percent (%)
   Resolution:	0.1

   Si by fusion, in %

   Silica (Si) content of fused, digested sediment in units of weight percent (%) (Source: producer defined)

   Range of values
   Minimum:	0.63
   Maximum:	30.80
   Units:	weight percent (%)
   Resolution:	0.01

   Ti by fusion, in %

   Titanium (Ti) content of fused, digested sediment in units of weight percent (%) (Source: producer defined)

   Range of values
   Minimum:	0.01
   Maximum:	0.77
   Units:	weight percent (%)
   Resolution:	0.01

   Ag by multi-acid, in mg/kg

   Silver (Ag) content of multi-acid digested sediment in units of mg/kg (Source: producer defined)

   Range of values
   Minimum:	<0.01
   Maximum:	0.92
   Units:	milligrams per kilogram (mg/kg)
   Resolution:	0.01

   As by multi-acid, in mg/kg

   Arsenic (As) content of multi-acid digested sediment in units of mg/kg (Source: producer defined)

   Range of values
   Minimum:	0.6
   Maximum:	26.7
   Units:	milligrams per kilogram (mg/kg)
   Resolution:	0.1

   Ba by multi-acid, in mg/kg

   Barium (Ba) content of multi-acid digested sediment in units of mg/kg (Source: producer defined)

   Range of values
   Minimum:	9
   Maximum:	2840
   Units:	milligrams per kilogram (mg/kg)
   Resolution:	1

   Be by multi-acid, in mg/kg

   Beryllium (Be) content of multi-acid digested sediment in units of mg/kg (Source: producer defined)

   Range of values
   Minimum:	<0.05
   Maximum:	1.96
   Units:	milligrams per kilogram (mg/kg)
   Resolution:	0.01

   Bi by multi-acid, in mg/kg

   Bismuth (Bi) content of multi-acid digested sediment in units of mg/kg (Source: producer defined)

   Range of values
   Minimum:	<0.01
   Maximum:	0.18
   Units:	milligrams per kilogram (mg/kg)
   Resolution:	0.01

   Cd by multi-acid, in mg/kg

   Cadmium (Cd) content of multi-acid digested sediment in units of mg/kg (Source: producer defined)

   Range of values
   Minimum:	<0.02
   Maximum:	0.88
   Units:	milligrams per kilogram (mg/kg)
   Resolution:	0.01

   Ce by fusion, in mg/kg

   Cerium (Ce) content of fused, digested sediment in units of mg/kg (Source: producer defined)

   Range of values
   Minimum:	<0.1
   Maximum:	47.6
   Units:	milligrams per kilogram (mg/kg)
   Resolution:	0.1

   Co by multi-acid, in mg/kg

   Cobalt (Co) content of multi-acid digested sediment in units of mg/kg (Source: producer defined)

   Range of values
   Minimum:	1.02
   Maximum:	112.00
   Units:	milligrams per kilogram (mg/kg)
   Resolution:	0.01

   Cr by fusion, in mg/kg

   Chromium (Cr) content of fused, digested sediment in units of mg/kg (Source: Producer defined)

   Range of values
   Minimum:	<10
   Maximum:	2700
   Units:	milligrams per kilogram (mg/kg)
   Resolution:	1

   Cs by multi-acid, in mg/kg

   Cesium (Cs) content of multi-acid digested sediment in units of mg/kg (Source: producer defined)

   Range of values
   Minimum:	0.02
   Maximum:	3.49
   Units:	milligrams per kilogram (mg/kg)
   Resolution:	0.01

   Cu by multi-acid, in mg/kg

   Copper (Cu) content of multi-acid digested sediment in units of mg/kg (Source: producer defined)

   Range of values
   Minimum:	<0.5
   Maximum:	303.0
   Units:	milligrams per kilogram (mg/kg)
   Resolution:	0.1

   Dy by fusion, in mg/kg

   Dysprosium (Dy) content of fused, digested sediment in units of mg/kg (Source: Producer defined)

   Range of values
   Minimum:	0.15
   Maximum:	7.30
   Units:	milligrams per kilogram (mg/kg)
   Resolution:	0.01

   Er by fusion, in mg/kg

   Erbium (Er) content of fused, digested sediment in units of mg/kg (Source: Producer defined)

   Range of values
   Minimum:	0.15
   Maximum:	4.93
   Units:	milligrams per kilogram (mg/kg)
   Resolution:	0.01

   Eu by fusion, in mg/kg

   Europium (Eu) content of fused, digested sediment in units of mg/kg (Source: Producer defined)

   Range of values
   Minimum:	<0.5
   Maximum:	1.69
   Units:	milligrams per kilogram (mg/kg)
   Resolution:	0.01

   Ga by multi-acid, in mg/kg

   Gadolinium (Ga) content of multi-acid digested sediment in units of mg/kg (Source: producer defined)

   Range of values
   Minimum:	0.50
   Maximum:	20.10
   Units:	milligrams per kilogram (mg/kg)
   Resolution:	0.01

   Gd by fusion, in mg/kg

   Gadolinium (Gd) content of fused, digested sediment in units of mg/kg (Source: Producer defined)

   Range of values
   Minimum:	0.08
   Maximum:	7.49
   Units:	milligrams per kilogram (mg/kg)
   Resolution:	0.01

   Ge by fusion, in mg/kg

   Germanium (Ge) content of fused, digested sediment in units of mg/kg (Source: Producer defined)

   Range of values
   Minimum:	<1
   Maximum:	2
   Units:	milligrams per kilogram (mg/kg)
   Resolution:	1

   Hf by fusion, in mg/kg

   Hafnium (Hf) content of fused, digested sediment in units of mg/kg (Source: Producer defined)

   Range of values
   Minimum:	<1
   Maximum:	4
   Units:	milligrams per kilogram (mg/kg)
   Resolution:	1

   Ho by fusion, in mg/kg

   Holmium (Ho) content of fused, digested sediment in units of mg/kg (Source: Producer defined)

   Range of values
   Minimum:	<0.05
   Maximum:	1.61
   Units:	milligrams per kilogram (mg/kg)
   Resolution:	0.01

   In by multi-acid, in mg/kg

   Indium (In) content of multi-acid digested sediment in units of mg/kg (Source: producer defined)

   Range of values
   Minimum:	<0.005
   Maximum:	0.101
   Units:	milligrams per kilogram (mg/kg)
   Resolution:	0.001

   La by fusion, in mg/kg

   Lanthanum (La) content of fused, digested sediment in units of mg/kg (Source: Producer defined)

   Range of values
   Minimum:	<0.1
   Maximum:	25.4
   Units:	milligrams per kilogram (mg/kg)
   Resolution:	0.1

   Li by multi-acid, in mg/kg

   Lithium (Li) content of multi-acid digested sediment in units of mg/kg (Source: producer defined)

   Range of values
   Minimum:	0.9
   Maximum:	44.5
   Units:	milligrams per kilogram (mg/kg)
   Resolution:	0.1

   Lu by fusion, in mg/kg

   Lutetium (Lu) content of fused, digested sediment in units of mg/kg (Source: Producer defined)

   Range of values
   Minimum:	<0.05
   Maximum:	0.72
   Units:	milligrams per kilogram (mg/kg)
   Resolution:	0.01

   Mn by multi-acid, in mg/kg

   Manganese (Mn) content of multi-acid digested sediment in units of mg/kg (Source: producer defined)

   Range of values
   Minimum:	8
   Maximum:	2880
   Units:	milligrams per kilogram (mg/kg)
   Resolution:	1

   Mo by multi-acid, in mg/kg

   Molybdenum (Mo) content of multi-acid digested sediment in units of mg/kg (Source: producer defined)

   Range of values
   Minimum:	0.09
   Maximum:	3.83
   Units:	milligrams per kilogram (mg/kg)
   Resolution:	0.05

   Nb by multi-acid, in mg/kg

   Niobium (Nb) content of multi-acid digested sediment in units of mg/kg (Source: producer defined)

   Range of values
   Minimum:	<0.1
   Maximum:	15.9
   Units:	milligrams per kilogram (mg/kg)
   Resolution:	0.1

   Nd by fusion, in mg/kg

   Neodymium (Nd) content of fused, digested sediment in units of mg/kg (Source: Producer defined)

   Range of values
   Minimum:	<0.1
   Maximum:	24.5
   Units:	milligrams per kilogram (mg/kg)
   Resolution:	0.1

   Ni by multi-acid, in mg/kg

   Nickel (Ni) content of multi-acid digested sediment in units of mg/kg (Source: producer defined)

   Range of values
   Minimum:	3.0
   Maximum:	2020.0
   Units:	milligrams per kilogram (mg/kg)
   Resolution:	0.1

   P by multi-acid, in mg/kg

   Phosphorus (P) content of multi-acid digested sediment in units of mg/kg (Source: producer defined)

   Range of values
   Minimum:	58
   Maximum:	2170
   Units:	milligrams per kilogram (mg/kg)
   Resolution:	1

   Pb by multi-acid, in mg/kg

   Lead (Pb) content of multi-acid digested sediment in units of mg/kg (Source: producer defined)

   Range of values
   Minimum:	0.1
   Maximum:	34.3
   Units:	milligrams per kilogram (mg/kg)
   Resolution:	0.1

   Pr by fusion, in mg/kg

   Praseodymium (Pr) content of fused, digested sediment in units of mg/kg (Source: Producer defined)

   Range of values
   Minimum:	<0.05
   Maximum:	5.21
   Units:	milligrams per kilogram (mg/kg)
   Resolution:	0.05

   Rb by multi-acid, in mg/kg

   Rubidium (Rb) content of multi-acid digested sediment in units of mg/kg (Source: producer defined)

   Range of values
   Minimum:	0.4
   Maximum:	70.8
   Units:	milligrams per kilogram (mg/kg)
   Resolution:	0.1

   Sb by multi-acid, in mg/kg

   Antimony (Sb) content of multi-acid digested sediment in units of mg/kg. QC=value did not meet quality control criteria (Source: producer defined)

   Range of values
   Minimum:	<0.05
   Maximum:	2.58
   Units:	milligrams per kilogram (mg/kg)
   Resolution:	0.01

   Sc by multi-acid, in mg/kg

   Scandium (Sc) content of multi-acid digested sediment in units of mg/kg. QC=value did not meet quality control criteria (Source: producer defined)

   Range of values
   Minimum:	0.3
   Maximum:	44.8
   Units:	milligrams per kilogram (mg/kg)
   Resolution:	0.1

   Sc by fusion, in mg/kg

   Scandium (Sc) content of fused, digested sediment in units of mg/kg (Source: Producer defined)

   Range of values
   Minimum:	<5
   Maximum:	43
   Units:	milligrams per kilogram (mg/kg)
   Resolution:	1

   Se by multi-acid, in mg/kg

   Selenium (Se) content of multi-acid digested sediment in units of mg/kg. QC=value did not meet quality control criteria (Source: producer defined)

   Range of values
   Minimum:	<0.5
   Maximum:	1.7
   Units:	milligrams per kilogram (mg/kg)
   Resolution:	0.1

   Sm by fusion, in mg/kg

   Samarium (Sm) content of fused, digested sediment in units of mg/kg (Source: Producer defined)

   Range of values
   Minimum:	<0.1
   Maximum:	5.3
   Units:	milligrams per kilogram (mg/kg)
   Resolution:	0.1

   Sn by fusion, in mg/kg

   Tin (Sn) content of fused, digested sediment in units of mg/kg (Source: Producer defined)

   Range of values
   Minimum:	<1
   Maximum:	36
   Units:	milligrams per kilogram (mg/kg)
   Resolution:	1

   Sr by multi-acid, in mg/kg

   Strontium (Sr) content of multi-acid digested sediment in units of mg/kg (Source: producer defined)

   Range of values
   Minimum:	5
   Maximum:	5000
   Units:	milligrams per kilogram (mg/kg)
   Resolution:	1

   Ta by multi-acid, in mg/kg

   Tantalum (Ta) content of multi-acid digested sediment in units of mg/kg (Source: producer defined)

   Range of values
   Minimum:	<0.05
   Maximum:	1.54
   Units:	milligrams per kilogram (mg/kg)
   Resolution:	0.01

   Tb by fusion, in mg/kg

   Terbium (Tb) content of fused, digested sediment in units of mg/kg (Source: Producer defined)

   Range of values
   Minimum:	<0.05
   Maximum:	1.15
   Units:	milligrams per kilogram (mg/kg)
   Resolution:	0.01

   Te by multi-acid, in mg/kg

   Tellurium (Te) content of multi-acid digested sediment in units of mg/kg. QC=value did not meet quality control criteria (Source: producer defined)

   Range of values
   Minimum:	<0.01
   Maximum:	0.17
   Units:	milligrams per kilogram (mg/kg)
   Resolution:	0.01

   Th by fusion, in mg/kg

   Thorium (Th) content of fused, digested sediment in units of mg/kg (Source: Producer defined)

   Range of values
   Minimum:	<0.1
   Maximum:	4.5
   Units:	milligrams per kilogram (mg/kg)
   Resolution:	0.1

   Tl by multi-acid, in mg/kg

   Thallium (Tl) content of multi-acid digested sediment in units of mg/kg (Source: producer defined)

   Range of values
   Minimum:	<0.01
   Maximum:	0.42
   Units:	milligrams per kilogram (mg/kg)
   Resolution:	0.01

   Tm by fusion, in mg/kg

   Thulium (Tm) content of fused, digested sediment in units of mg/kg (Source: Producer defined)

   Range of values
   Minimum:	<0.05
   Maximum:	0.68
   Units:	milligrams per kilogram (mg/kg)
   Resolution:	0.01

   U by fusion, in mg/kg

   Uranium (U) content of fused, digested sediment in units of mg/kg (Source: Producer defined)

   Range of values
   Minimum:	<0.05
   Maximum:	5.50
   Units:	milligrams per kilogram (mg/kg)
   Resolution:	0.01

   V by multi-acid, in mg/kg

   Vanadium (V) content of multi-acid digested sediment in units of mg/kg (Source: producer defined)

   Range of values
   Minimum:	4.2
   Maximum:	321.0
   Units:	milligrams per kilogram (mg/kg)
   Resolution:	0.1

   W by multi-acid, in mg/kg

   Tungsten (W) content of multi-acid digested sediment in units of mg/kg (Source: producer defined)

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

   Y by fusion, in mg/kg

   Yttrium (Y) content of fused digested sediment in units of mg/kg (Source: Producer defined)

   Range of values
   Minimum:	1.1
   Maximum:	41.0
   Units:	milligrams per kilogram (mg/kg)
   Resolution:	0.1

   Yb by fusion, in mg/kg

   Ytterbium (Yb) content of fused digested sediment in units of mg/kg (Source: Producer defined)

   Range of values
   Minimum:	0.2
   Maximum:	4.7
   Units:	milligrams per kilogram (mg/kg)
   Resolution:	0.1

   Zn by multi-acid, in mg/kg

   Zinc (Zn) content of multi-acid digested sediment in units of mg/kg (Source: producer defined)

   Range of values
   Minimum:	3.7
   Maximum:	184.0
   Units:	milligrams per kilogram (mg/kg)
   Resolution:	0.1

   Zr by fusion, in %

   Zirconium (Zr) content of the fused, digested sediment in units of weight percent (%) (Source: Producer defined)

   Range of values
   Minimum:	1.1
   Maximum:	170.0
   Units:	weight percent (%)
   Resolution:	0.1

   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?

   Powdered rocks and sediments were submitted for compositional analysis (elemental and major oxide contents) to the Analytical Chemistry Project of the USGS Central Mineral and Environmental Resources Science Center (CMERSC), which contracted with Agat Laboratories for analyses. CMERSC staff performed QA/QC checks. Strontium isotopes were analyzed by Dr. Aaron Reyes at the W. M. Keck Isotope Facility at the University of California at Santa Cruz. Angela Tan analyzed grain size parameters, total organic carbon contents, and carbonate contents at the USGS Pacific Coastal and Marine Science Center sediment laboratory.

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?

Geochemical and isotopic compositions of terrestrial sediment and parent rocks show the source, fate, and timing of runoff from southwest Puerto Rico watersheds to nearshore coral reefs. Sample collection for the study spanned pre- and post-hurricane conditions in the coastal region associated with Hurricanes Irma and Maria in September 2017. Knowledge about terrestrial runoff sources can identify watershed where restoration and erosion control activities are most needed.

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: 17-May-2019 (process 1 of 11)

   GRAIN-SIZE DISTRIBUTION: 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 <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 (<0.063 millimeter) particles. The sand and gravel fractions were dried at 80 degrees Celsius and weighed. Five milliliters of sodium hexametaphosphate was 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. Particle size distributions of mud and sand were analyzed separately using a Beckman Coulter Counter (LS 13 320). Gravel particle sizes were analyzed by dry sieving. The gravel, sand, and mud fractional weights were integrated into a single grain-size distribution for each sample. Grain size statistical parameters were calculated according to Folk and Ward (1957). Person who carried out this activity:
   

   Angela Tan

   USGS Pacific Coastal and Marine Science Center

   Physical scientist

   2885 Mission Street

   Santa Cruz, CA
   

   831-460-7409 (voice)

   atan@usgs.gov

   Date: 04-Mar-2018 (process 2 of 11)

   CARBON AND CARBONATE CONTENTS: Total carbon (TC), total inorganic carbon (TIC), and total organic carbon contents of bulk sediment were determined coulometrically (CM 5015 coulometer; UIC, Inc.) at the USGS Pacific Coastal and Marine Science Center sediment lab. Approximately 1 gram of sediment was dried overnight at 80 degrees Celsius and pulverized by hand in a mortar and pestle. TC was determined by incineration at 950 degrees Celsius (UIC CM 5200 furnace) of 20 milligrams of dry sediment loaded into in foil capsules. TIC was determined by perchloric acid digestion (UIC CM 5130 acid digester) of 20 milligrams of dry sediment. TOC was calculated as the difference between TC and TIC. The calcium carbonate (CaCO3) content of sediment in weight percent was determined by multiplying TIC by 8.333, the mass ratio of CaCO3 to carbon. Person who carried out this activity:
   

   Angela Tan

   USGS Pacific Coastal and Marine Science Center

   Physical scientist

   2885 Mission Street

   Santa Cruz, CA
   

   831-460-7409 (voice)

   atan@usgs.gov

   Date: 25-Jul-2018 (process 3 of 11)

   SHORT-LIVED COSMOGENIC NUCLIDES: Prior to quantification of sedimentary activities of short-lived radionuclides by gamma spectroscopy, sediment was oven-dried at 60 degrees Celsius, ground by hand in a mortar and pestle to a homogeneous grain size, and loaded into 10 milliliter graduated polystyrene vials. Vials were capped and taped with Parafilm to prevent gas exchange.

   Date: 02-Nov-2017 (process 4 of 11)

   STRONTIUM ISOTOPES: Prior to analyses of sedimentary strontium isotope ratios, sediment was oven-dried at 60 degrees Celsius, disaggregated gently to avoid changing grain sizes, and dry-sieved through stainless steel sieves to obtain the <0.063 millimeter-diameter fraction for geochemical analyses. Carbonate was removed from the fine fraction by leaching for 6 hours in a weak (2.5 Normal) hydrochloric acid solution. After carbonate removal, residues were decomposed and analyzed for strontium isotope ratios. Person who carried out this activity:
   

   Aaron O. Reyes

   Westfield State University

   Associate Professor

   Westfield State University, Wilson Hall Room 312-B, 577 Western Avenue

   Westfield, MA
   

   413-572-8380 (voice)

   413-572-5441 (FAX)

   aoreyes@westfield.ma.edu

   Date: 27-Jul-2017 (process 5 of 11)

   ROCK SAMPLE PREPARATION: Prior to analyses in bedrock of major element oxide contents, trace elemental contents, and strontium isotope ratios, bedrock samples were powdered to less than 0.075 millimeter-diameter particles by ALS USA, Inc., a commercial laboratory. Person who carried out this activity:
   

   Mary Stollenwerk

   ALS USA, Inc.

   Manager Client Services and Marketing, Geochemistry

   4977 Energy Way

   Reno, NV
   

   775-356-5395 (voice)

   Mary.Stollenwerk@alsglobal.com

   Date: 10-Aug-2018 (process 6 of 11)

   SEDIMENT SAMPLE PREPARATION: Prior to analyses in sediment of major element oxide and trace elemental contents, sediment was oven-dried at 60 degrees Celsius, disaggregated gently to avoid changing grain sizes, and dry-sieved through stainless steel sieves to obtain the <0.063 millimeter-diameter fraction for geochemical analyses.

   Date: 21-Nov-2019 (process 7 of 11)

   Two minor edits were made to the xml syntax. No data information was changed. Person who carried out this activity:
   

   Susan A. Cochran

   U.S. Geological Survey, Pacific Coastal and Marine Science Center

   2885 Mission St.

   Santa Cruz, CA
   

   USA

   831-460-7545 (voice)

   scochran@usgs.gov

   Date: 18-Aug-2020 (process 8 of 11)

   Corrected one of the field activity URLs found in the Supplemental Information section. No data information was changed. Person who carried out this activity:
   

   Susan A. Cochran

   U.S. Geological Survey, Pacific Coastal and Marine Science Center

   2885 Mission St.

   Santa Cruz, CA
   

   USA

   831-460-7545 (voice)

   scochran@usgs.gov

   Date: 19-Oct-2020 (process 9 of 11)

   Edited metadata to add keywords section with USGS persistent identifier as theme keyword. No data were changed. Person who carried out this activity:
   

   U.S. Geological Survey

   Attn: VeeAnn A. Cross

   Marine Geologist

   384 Woods Hole Road

   Woods Hole, MA
   

   508-548-8700 x2251 (voice)

   508-457-2310 (FAX)

   vatnipp@usgs.gov

   Date: 01-Jul-2021 (process 10 of 11)

   Metadata file was updated to add citation information for a recently published journal article in which these data were used to the Abstract and Cross-Reference sections. No data were changed. Person who carried out this activity:
   

   Susan A. Cochran

   U.S. Geological Survey, Pacific Coastal and Marine Science Center

   2885 Mission St.

   Santa Cruz, CA
   

   USA

   831-460-7545 (voice)

   scochran@usgs.gov

   Date: 13-Oct-2021 (process 11 of 11)

   Performed minor edits to the metadata to correct typos. No data were changed Person who carried out this activity:
   

   U.S. Geological Survey

   Attn: Susan A. Cochran

   Geologist

   2885 Mission Street

   Santa Cruz, CA
   

   831-460-7545 (voice)

   scochran@usgs.gov

3. What similar or related data should the user be aware of?
   Takesue, R.K., Sherman, C., Ramirez, N.I., Reyes, A.O., Cheriton, O.M., Rios, R.V., and Storlazzi, C.D., 2021, Land-based sediment sources and transport to southwest Puerto Rico coral reefs after Hurricane Maria, May 2017 to June 2018.

   Online Links:

   • https://doi.org/10.1016/j.ecss.2021.107476

   Other_Citation_Details:

   Takesue, R.K., Sherman, C., Ramirez, N.I., Reyes, A.O., Cheriton, O.M., Rios, R.V., and Storlazzi, C.D., 2021, Land-based sediment sources and transport to southwest Puerto Rico coral reefs after Hurricane Maria, May 2017 to June 2018: Estuarine, Coastal and Shelf Science, v. 59, p. 107476.

   Folk, Robert L., and Ward, William C., 1957, Brazos River bar; a study in the significance of grain size parameters.

   Online Links:

   • https://doi.org/10.1306/74D70646-2B21-11D7-8648000102C1865D

   Other_Citation_Details:

   Folk, R.L., and Ward, W.C., 1957, Brazos River bar; a study in the significance of grain size parameters: Journal of Sedimentary Research, v. 27, n. 1, p. 3-26.

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

1. How well have the observations been checked?
   For major oxides, elemental compositions, and strontium isotopes, rock reference materials were used to assess accuracy of the data. The percent recoveries for all oxides and elements were within 15% of reference values for concentrations that were five times the limit of detection or higher. Strontium isotope ratios were within 0.0006% of the reference value. For short-lived cosmogenic radionuclides, sample activities were calculated by comparison to reference standards with the same geometry and counting time; reported uncertainties include 1 standard deviation counting errors, detector efficiency, and background corrections. For grain size analyses, duplicates analyzed every 20 samples were within 15% of original values. Carbon analyses were run in duplicate and averaged.
2. How accurate are the geographic locations?
   Garmin 78sc 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?
   Major oxide contents were not determined in the majority of marine sediments. Strontium isotopes were determined in select stream and nearshore sediments. Short-lived cosmogenic radionuclide activities were not determined in bedrock or stream sediment. Grain size distributions and carbon contents were not determined in bedrock. Various samples had insufficient material for major oxide, elemental, strontium isotope, grain size, and carbon analyses.
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 (SouthwestPuertoRicoSedimentRockCompositions2017-2018.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?
   • Availability in digital form:

     Data format:	Zip file contains the csv table and the associated metadata. in format comma-delimited text Size: 0.02
     Network links:	https://www.sciencebase.gov/catalog/file/get/5c7dcfece4b0fe48cb5333ad https://doi.org/10.5066/P9QEAV6O

   • 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: 13-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)