Rachel M. Allen
Samantha C. McGill
Angela C. Tan
20211015
Grain size of bed sediment surface samples from south San Francisco Bay, California, summer 2020
Comma-separated values
data release
doi:10.5066/P99Q4CHM
Pacific Coastal and Marine Science Center, Santa Cruz, California
U.S. Geological Survey
https://doi.org/10.5066/P99Q4CHM
https://www.sciencebase.gov/catalog/item/602a99d4d34eb1203113b187
Rachel M. Allen
Jessica R. Lacy
Samantha C. McGill
Joanne C.T. Ferreira
20210330
Hydrodynamic, sediment transport, and sediment flocculation data from south San Francisco Bay, California, summer 2020
data release
doi:10.5066/P99Q4CHM
Pacific Coastal and Marine Science Center, Santa Cruz, California
U.S. Geological Survey
https://doi.org/10.5066/P99Q4CHM
Bed sediment samples were collected in south San Francisco Bay on two days in July 2020 to analyze for sediment grain size distributions. Sediment samples were collected from the R/V Snavely near pre-established U.S. Geological Survey instrument moorings using a Gomex or Ponar box corer that was subsampled by scraping the top 0.5 cm of the core. Data are provided in a comma-delimited values spreadsheet.
These data were collected to reveal the primary particle grain size of sediment available on the bed at the instrumentation sites. They were collected as part of a collaborative study funded by the San Francisco Estuary Institute on tidal controls of suspended particle size in south San Francisco Bay. These data are intended for researchers, students, policy makers, and the general public.
Additional information about the field activity from which these data were derived is available online at:
https://cmgds.marine.usgs.gov/fan_info.php?fan=2020-621-FA
Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government.
20200716
20200730
ground condition
None planned
-122.1788
-122.1669
37.5491
37.5414
USGS Metadata Identifier
USGS:a171bd80-34e0-40c2-a6b2-238ad72920ab
ISO 19115 Topic Category
oceans
USGS Thesaurus
grab sampling
sea-floor characteristics
grain-size analysis
unconsolidated deposits
sediment transport
Data Categories for Marine Planning
Substrate
Marine Realms Information Bank (MRIB) keywords
Sediment
None
USGS
U.S. Geological Survey
PCMSC
Pacific Coastal and Marine Science Center
CMHRP
Coastal and Marine Hazards and Resources Program
Geographic Names Information System
San Francisco Bay
State of California
None
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.
U.S. Geological Survey, Pacific Coastal and Marine Science Center
PCMSC Science Data Coordinator
mailing and physical
2885 Mission Street
Santa Cruz
CA
95060
831-460-4747
pcmsc_data@usgs.gov
https://www.sciencebase.gov/catalog/file/get/602a99d4d34eb1203113b187?name=CSF20_SiteMap.jpg&allowOpen=true
Map of study area showing locations of USGS moorings and bed grab locations in the channel and shallows.
JPEG
Robert Louis Folk
William C. Ward
1957
Brazos River bar; a study in the significance of grain size parameters
Journal article
Journal of Sedimentary Research, v. 27, n. 1, p. 3-26
Boulder, CO
SEPM Society for Sedimentary Geology
https://doi.org/10.1306/74D70646-2B21-11D7-8648000102C1865D
Douglas Lamar Inman
1952
Measures for describing the size distribution of sediments
Journal article
Journal of Sedimentary Research, v. 22, n. 3, p. 125-145
Boulder, CO
SEPM Society for Sedimentary Geology
https://doi.org/10.1306/D42694DB-2B26-11D7-8648000102C1865D
Parker D. Trask
1930
Mechanical analyses of sediments by centrifuge
Journal article
Economic Geology, v. 26, n. 6, p. 581-599
Littleton, CO
Society of Economic Geologists (SEG)
https://doi.org/10.2113/gsecongeo.25.6.581
Data values are within the expected values.
Data values are within the expected values.
Each sample included the top 0.5 cm of bed sediment; subsampled from Ponar and Gomex grabs. Samples were placed into Whirl-pak bags.
The grain-size distributions of samples were determined in the USGS Pacific Coastal and Marine Science Center sediment lab. Approximately 20 g of sediment was subsampled and 10 mL of 30 percent hydrogen peroxide was added to remove organic material in the sample. The sample was heated at 250 degrees C to remove any remaining hydrogen peroxide and was placed in an ultrasonic bath to liberate the fine fraction. Subsequently, the sample was centrifuged for 1.5 hours to remove soluble salts. Samples were funneled through a 1-mm and a 63-um sieve to separate the gravel (greater than 1 mm), sand (63 um to 1 mm), and mud (less than 63 um). The sand and gravel fractions were dried in an 80-degree C oven and weighed. Five mL of sodium hexametaphosphate was added to the mud fraction and a 20 mL aliquot was taken from a 1 L graduated cylinder to determine the weight of the mud. The particle-size distribution of the mud and sand fractions 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. Where used, phi sizes are equal to the negative log base 1 of millimeter size.
20200810
Data were collected in south San Francisco Bay, California
Point
Point
607
1.0E-5
1.0E-5
Decimal degrees
World Geodetic System 1984 (WGS84)
WGS84
6378137.0
298.257223563
CSF20_GrainSizeAnalysis.csv
Table containing attribute information associated with the dataset
Producer defined
FAN ID
Unique U.S. Geological Survey field activity number (FAN). "NA" indicates that no value was assigned.
Producer defined
Unique U.S. Geological Survey field activity number (FAN).
Sample ID
Sample identifier
Producer defined
Unique identifier for samples; assigned in the field.
Lab ID
Sample identifier for sediment lab in YY-FFFFF-XX format, where YY is the 2-digit year (for example 19=2019), FFFFF is the 5-digit field-activity-number (FAN) ID code, and XX is a sequential number given to the sample in the lab. "NA" indicates that no value was assigned.
Producer defined
Unique identifier for samples; assigned in the sediment lab.
Date Collected
Date in month/day/year format of sample collection.
Producer defined
07/16/2020
07/30/2020
Date in month/day/year format
Time (PDT)
Time of sample collection, in hours:minutes:seconds format, Pacific Daylight Time (PDT),
Producer defined
08:00:49
13:45:00
hours:minutes:seconds format, Pacific Daylight Time (PDT)
Decription
Collection method.
Producer defined
ponar grab
samples collected with ponar grab
Producer defined
gomex grab
samples collected with gomex grab
Producer defined
Latitude
Latitude of sample location in decimal degrees, north.
Producer defined
37.54184
37.54780
Decimal degrees
Longitude
Longitude of sample location in decimal degrees, east.
Producer defined
-122.16768
-122.17565
Decimal degrees
Core Depth
The midpoint of the depth into the sediment bed of the sample.
Producer defined
0.25
7.50
centimeters
Processing Notes
Relevant information regarding the sample during its processing
Producer defined
Unique note of relevant information regarding sample
Wt. percent in -4.00 phi bin or 16 mm bin
Weight percent of sample with grain diameter greater than -4.00 phi, or 16 mm, "NA" indicates that no value was calculated.
producer defined
0
0
percentage
Wt. percent in -3.75 phi bin or 13.5 mm bin
Weight percent of sample with grain diameter between -4.00 and -3.75 phi, or 13.5 and 16 mm, "NA" indicates that no value was calculated.
producer defined
0
0
percentage
Wt. percent in -3.50 phi bin or 11.2 mm bin
Weight percent of sample with grain diameter between -3.75 and -3.50 phi, or 11.2 and 13.5 mm, "NA" indicates that no value was calculated.
producer defined
0
0
percentage
Wt. percent in -3.25 phi bin or 9.51 mm bin
Weight percent of sample with grain diameter between -3.50 and -3.25 phi, or 9.51 and 11.2 mm, "NA" indicates that no value was calculated.
producer defined
0
0
percentage
Wt. percent in -3.00 phi bin or 8 mm bin
Weight percent of sample with grain diameter between -3.25 and -3.00 phi, or 8 and 9.51 mm, "NA" indicates that no value was calculated.
producer defined
0
0
percentage
Wt. percent in -2.75 phi bin or 6.73 mm bin
Weight percent of sample with grain diameter between -3.00 and -2.75 phi, or 6.73 and 8 mm, "NA" indicates that no value was calculated.
producer defined
0
0
percentage
Wt. percent in -2.50 phi bin or 5.66 mm bin
Weight percent of sample with grain diameter between -2.75 and -2.50 phi, or 5.66 and 6.73 mm, "NA" indicates that no value was calculated.
producer defined
0
0
percentage
Wt. percent in -2.25 phi bin or 4.76 mm bin
Weight percent of sample with grain diameter between -2.50 and -2.25 phi, or 4.76 and 5.66 mm, "NA" indicates that no value was calculated.
producer defined
0
0
percentage
Wt. percent in -2.00 phi bin or 4 mm bin
Weight percent of sample with grain diameter between -2.25 and -2.00 phi, or 4 and 4.76 mm, "NA" indicates that no value was calculated.
producer defined
0
0
percentage
Wt. percent in -1.75 phi bin or 3.36 mm bin
Weight percent of sample with grain diameter between -2.00 and -1.75 phi, or 3.36 and 4 mm, "NA" indicates that no value was calculated.
producer defined
0
0
percentage
Wt. percent in -1.50 phi bin or 2.83 mm bin
Weight percent of sample with grain diameter between -1.75 and -1.50 phi, or 2.83 and 3.36 mm, "NA" indicates that no value was calculated.
producer defined
0
0
percentage
Wt. percent in -1.25 phi bin or 2.38 mm bin
Weight percent of sample with grain diameter between -1.50 and -1.25 phi, or 2.38 and 2.83 mm, "NA" indicates that no value was calculated.
producer defined
0
0
percentage
Wt. percent in -1.00 phi bin or 2 mm bin
Weight percent of sample with grain diameter between -1.25 and -1.00 phi, or 2 and 2.38 mm, "NA" indicates that no value was calculated.
producer defined
0
0
percentage
Wt. percent in -0.75 phi bin or 1.68 mm bin
Weight percent of sample with grain diameter between -1.00 and -0.75 phi, or 1.68 and 2 mm, "NA" indicates that no value was calculated.
producer defined
0
0.132621
percentage
Wt. percent in -0.50 phi bin or 1.41 mm bin
Weight percent of sample with grain diameter between -0.75 and -0.50 phi, or 1.41 and 1.68 mm, "NA" indicates that no value was calculated.
producer defined
0
0.288888
percentage
Wt. percent in -0.25 phi bin or 1.19 mm bin
Weight percent of sample with grain diameter between -0.50 and -0.25 phi, or 1.19 and 1.41 mm, "NA" indicates that no value was calculated.
producer defined
0
0.599365
percentage
Wt. percent in 0.00 phi bin or 1 mm bin
Weight percent of sample with grain diameter between -0.25 and 0.00 phi, or 1 and 1.19 mm, "NA" indicates that no value was calculated.
producer defined
0
0.713481
percentage
Wt. percent in 0.25 phi bin or 0.8409 mm bin
Weight percent of sample with grain diameter between 0.00 and 0.25 phi, or 0.8409 and 1 mm, "NA" indicates that no value was calculated.
producer defined
0
0.704229
percentage
Wt. percent in 0.50 phi bin or 0.7071 mm bin
Weight percent of sample with grain diameter between 0.25 and 0.50 phi, or 0.7071 and 0.8409 mm, "NA" indicates that no value was calculated.
producer defined
0
0.525344
percentage
Wt. percent in 0.75 phi bin or 0.5946 mm bin
Weight percent of sample with grain diameter between 0.50 and 0.75 phi, or 0.5946 and 0.7071 mm, "NA" indicates that no value was calculated.
producer defined
0
0.365993
percentage
Wt. percent in 1.00 phi bin or 0.5 mm bin
Weight percent of sample with grain diameter between 0.75 and 1.00 phi, or 0.5 and 0.5946 mm, "NA" indicates that no value was calculated.
producer defined
0
0.398892
percentage
Wt. percent in 1.25 phi bin or 0.4204 mm bin
Weight percent of sample with grain diameter between 1.00 and 1.25 phi, or 0.4204 and 0.5 mm, "NA" indicates that no value was calculated.
producer defined
0
0.316646
percentage
Wt. percent in 1.50 phi bin or 0.3536 mm bin
Weight percent of sample with grain diameter between 1.25 and 1.50 phi, or 0.3536 and 0.4204 mm, "NA" indicates that no value was calculated.
producer defined
0
0.104573
percentage
Wt. percent in 1.75 phi bin or 0.2973 mm bin
Weight percent of sample with grain diameter between 1.50 and 1.75 phi, or 0.2973 and 0.3536 mm, "NA" indicates that no value was calculated.
producer defined
0
0.096071
percentage
Wt. percent in 2.00 phi bin or 0.25 mm bin
Weight percent of sample with grain diameter between 1.75 and 2.00 phi, or 0.25 and 0.2973 mm, "NA" indicates that no value was calculated.
producer defined
0
0.225155
percentage
Wt. percent in 2.25 phi bin or 0.2102 mm bin
Weight percent of sample with grain diameter between 2.00 and 2.25 phi, or 0.2102 and 0.25 mm, "NA" indicates that no value was calculated.
producer defined
0.000061
0.425134
percentage
Wt. percent in 2.50 phi bin or 0.1768 mm bin
Weight percent of sample with grain diameter between 2.25 and 2.50 phi, or 0.1768 and 0.2102 mm, "NA" indicates that no value was calculated.
producer defined
0.0056
0.872752
percentage
Wt. percent in 2.75 phi bin or 0.1487 mm bin
Weight percent of sample with grain diameter between 2.50 and 2.75 phi, or 0.1487 and 0.1768 mm, "NA" indicates that no value was calculated.
producer defined
0.07003
1.526384
percentage
Wt. percent in 3.00 phi bin or 0.125 mm bin
Weight percent of sample with grain diameter between 2.75 and 3.00 phi, or 0.125 and 0.1487 mm, "NA" indicates that no value was calculated.
producer defined
0.100043
1.553295
percentage
Wt. percent in 3.25 phi bin or 0.1051 mm bin
Weight percent of sample with grain diameter between 3.00 and 3.25 phi, or 0.1051 and 0.125 mm, "NA" indicates that no value was calculated.
producer defined
0.094040
1.014122
percentage
Wt. percent in 3.50 phi bin or 0.08839 mm bin
Weight percent of sample with grain diameter between 3.25 and 3.50 phi, or 0.08839 and 0.1051 mm, "NA" indicates that no value was calculated.
producer defined
0.140060
0.624282
percentage
Wt. percent in 3.75 phi bin or 0.07433 mm bin
Weight percent of sample with grain diameter between 3.50 and 3.75 phi, or 0.07433 and 0.08839 mm, "NA" indicates that no value was calculated.
producer defined
0.300019
0.654420
percentage
Wt. percent in 4.00 phi bin or 0.0625 mm bin
Weight percent of sample with grain diameter between 3.75 and 4.00 phi, or 0.0625 and 0.07433 mm, "NA" indicates that no value was calculated.
producer defined
0.660281
1.016506
percentage
Wt. percent in 4.25 phi bin or 0.052556 mm bin
Weight percent of sample with grain diameter between 4.00 and 4.25 phi, or 0.052556 and 0.0625 mm, "NA" indicates that no value was calculated.
producer defined
1.139992
1.759672
percentage
Wt. percent in 4.50 phi bin or 0.044194 mm bin
Weight percent of sample with grain diameter between 4.25 and 4.50 phi, or 0.044194 and 0.052556 mm, "NA" indicates that no value was calculated.
producer defined
1.849986
2.788052
percentage
Wt. percent in 4.75 phi bin or 0.037163 mm bin
Weight percent of sample with grain diameter between 4.50 and 4.75 phi, or 0.037163 and 0.044194 mm, "NA" indicates that no value was calculated.
producer defined
2.729980
3.734879
percentage
Wt. percent in 5.00 phi bin or 0.03125 mm bin
Weight percent of sample with grain diameter between 4.75 and 5.00 phi, or 0.03125 and 0.037163 mm, "NA" indicates that no value was calculated.
producer defined
3.344415
4.272701
percentage
Wt. percent in 5.25 phi bin or 0.02628 mm bin
Weight percent of sample with grain diameter between 5.00 and 5.25 phi, or 0.02628 and 0.03125 mm, "NA" indicates that no value was calculated.
producer defined
3.432681
4.250592
percentage
Wt. percent in 5.50 phi bin or 0.0221 mm bin
Weight percent of sample with grain diameter between 5.25 and 5.50 phi, or 0.0221 and 0.02628 mm, "NA" indicates that no value was calculated.
producer defined
3.233891
3.860538
percentage
Wt. percent in 5.75 phi bin or 0.01858 mm bin
Weight percent of sample with grain diameter between 5.50 and 5.75 phi, or 0.01858 and 0.0221 mm, "NA" indicates that no value was calculated.
producer defined
3.058539
3.551509
percentage
Wt. percent in 6.00 phi bin or 0.01563 mm bin
Weight percent of sample with grain diameter between 5.75 and 6.00 phi, or 0.01563 and 0.01858 mm, "NA" indicates that no value was calculated.
producer defined
3.094539
3.611535
percentage
Wt. percent in 6.25 phi bin or 0.01314 mm bin
Weight percent of sample with grain diameter between 6.00 and 6.25 phi, or 0.01314 and 0.01563 mm, "NA" indicates that no value was calculated.
producer defined
3.429391
3.981692
percentage
Wt. percent in 6.50 phi bin or 0.01105 mm bin
Weight percent of sample with grain diameter between 6.25 and 6.50 phi, or 0.01105 and 0.01314 mm, "NA" indicates that no value was calculated.
producer defined
3.707373
4.289968
percentage
Wt. percent in 6.75 phi bin or 0.00929 mm bin
Weight percent of sample with grain diameter between 6.50 and 6.75 phi, or 0.00929 and 0.01105 mm, "NA" indicates that no value was calculated.
producer defined
3.868224
4.479967
percentage
Wt. percent in 7.00 phi bin or 0.00781 mm bin
Weight percent of sample with grain diameter between 6.75 and 7.00 phi, or 0.00781 and 0.00929 mm, "NA" indicates that no value was calculated.
producer defined
3.975664
4.589966
percentage
Wt. percent in 7.25 phi bin or 0.00657 mm bin
Weight percent of sample with grain diameter between 7.00 and 7.25 phi, or 0.00657 and 0.00781 mm, "NA" indicates that no value was calculated.
producer defined
4.056501
4.669965
percentage
Wt. percent in 7.50 phi bin or 0.00552 mm bin
Weight percent of sample with grain diameter between 7.25 and 7.50 phi, or 0.00552 and 0.00657 mm, "NA" indicates that no value was calculated.
producer defined
4.155485
4.769965
percentage
Wt. percent in 7.75 phi bin or 0.00465 mm bin
Weight percent of sample with grain diameter between 7.50 and 7.75 phi, or 0.00465 and 0.00552 mm, "NA" indicates that no value was calculated.
producer defined
4.092589
4.679965
percentage
Wt. percent in 8.00 phi bin or 0.00391 mm bin
Weight percent of sample with grain diameter between 7.75 and 8.00 phi, or 0.00391 and 0.00465 mm, "NA" indicates that no value was calculated.
producer defined
4.065369
4.649966
percentage
Wt. percent in 8.25 phi bin or 0.00329 mm bin
Weight percent of sample with grain diameter between 8.00 and 8.25 phi, or 0.00329 and 0.00391 mm, "NA" indicates that no value was calculated.
producer defined
3.948136
4.499967
percentage
Wt. percent in 8.50 phi bin or 0.00276 mm bin
Weight percent of sample with grain diameter between 8.25 and 8.50 phi, or 0.00276 and 0.00329 mm, "NA" indicates that no value was calculated.
producer defined
3.660618
4.159969
percentage
Wt. percent in 8.75 phi bin or 0.00232 mm bin
Weight percent of sample with grain diameter between 8.50 and 8.75 phi, or 0.00232 and 0.00276 mm, "NA" indicates that no value was calculated.
producer defined
3.454154
3.909971
percentage
Wt. percent in 9.00 phi bin or 0.00195 mm bin
Weight percent of sample with grain diameter between 8.75 and 9.00 phi, or 0.00195 and 0.00232 mm, "NA" indicates that no value was calculated.
producer defined
3.247936
3.669973
percentage
Wt. percent in 9.25 phi bin or 0.00164 mm bin
Weight percent of sample with grain diameter between 9.00 and 9.25 phi, or 0.00164 and 0.00195 mm, "NA" indicates that no value was calculated.
producer defined
3.059905
3.449974
percentage
Wt. percent in 9.50 phi bin or 0.00138 mm bin
Weight percent of sample with grain diameter between 9.25 and 9.50 phi, or 0.00138 and 0.00164 mm, "NA" indicates that no value was calculated.
producer defined
2.908076
3.279976
percentage
Wt. percent in 9.75 phi bin or 0.00116 mm bin
Weight percent of sample with grain diameter between 9.50 and 9.75 phi, or 0.00116 and 0.00138 mm, "NA" indicates that no value was calculated.
producer defined
2.801356
3.169977
percentage
Wt. percent in 9.99 phi bin or 0.00098 mm bin
Weight percent of sample with grain diameter between 9.75 and 9.99 phi, or 0.00098 and 0.00116 mm, "NA" indicates that no value was calculated.
producer defined
2.568740
2.909978
percentage
Wt. percent in 10.25 phi bin or 0.00082 mm bin
Weight percent of sample with grain diameter between 9.99 and 10.25 phi, or 0.00082 and 0.00098 mm, "NA" indicates that no value was calculated.
producer defined
2.488417
2.829979
percentage
Wt. percent in 10.50 phi bin or 0.00069 mm bin
Weight percent of sample with grain diameter between 10.25 and 10.50 phi, or 0.00069 and 0.00082 mm, "NA" indicates that no value was calculated.
producer defined
2.084027
2.379982
percentage
Wt. percent in 10.75 phi bin or 0.00058 mm bin
Weight percent of sample with grain diameter between 10.50 and 10.75 phi, or 0.00058 and 0.00069 mm, "NA" indicates that no value was calculated.
producer defined
1.696960
1.939986
percentage
Wt. percent in 10.99 phi bin or 0.00049 mm bin
Weight percent of sample with grain diameter between 10.75 and 10.99 phi, or 0.00049 and 0.00058 mm, "NA" indicates that no value was calculated.
producer defined
1.184297
1.359990
percentage
Wt. percent in 11.25 phi bin or 0.0004 mm bin
Weight percent of sample with grain diameter between 10.99 and 11.25 phi, or 0.0004 and 0.00049 mm, "NA" indicates that no value was calculated.
producer defined
0.672785
0.779994
percentage
Wt. percent in 11.48 phi bin or 0.00035 mm bin
Weight percent of sample with grain diameter between 11.25 and 11.48 phi, or 0.00035 and 0.0004 mm, "NA" indicates that no value was calculated.
producer defined
0.161468
0.180077
percentage
Wt. percent in 12.02 phi bin or 0.000241 mm bin
Weight percent of sample with grain diameter between 11.50 and 12.02 phi, or 0.000241 and 0.00035 mm, "NA" indicates that no value was calculated.
producer defined
0.0
0.0
percentage
Wt. percent in 13.02 phi bin or 0.00012 mm bin
Weight percent of sample with grain diameter between 12.02 and 13.02 phi, or 0.00012 and 0.000241 mm, "NA" indicates that no value was calculated.
producer defined
0.0
0.0
percentage
Percent Gravel
Percent of sample greater than 2 mm, "NA" indicates that no value was calculated.
Producer defined
0.0
0.0
Percentage
Percent Sand
Percent of sample less than 2 mm and greater than 63 microns, "NA" indicates that no value was calculated.
Producer defined
1.398094
12.045763
Percentage
Percent Silt
Percent of sample less than 63 microns and greater than 4 microns, "NA" indicates that no value was calculated.
Producer defined
54.017363
61.338545
Percentage
Percent Clay
Percent of sample less than 4 microns, "NA" indicates that no value was calculated.
Producer defined
33.936875
38.519715
Percentage
Percent Mud
Percent of sample less than 63 microns, "NA" indicates that no value was calculated.
Producer defined
87.954237
98.601906
Percentage
Gravel to Sand Ratio
ratio of percent gravel in sample to percent sand.
producer defined
0.0
0.0
no unit
Sand to Silt Ratio
ratio of percent sand in sample to percent silt.
producer defined
0.023
0.223
no unit
Silt to Clay Ratio
ratio of percent silt in sample to percent clay.
producer defined
1.550
1.674
no unit
Sand to Clay Ratio
ratio of percent sand in sample to percent clay.
producer defined
0.037
0.355
no unit
Sand to Mud Ratio
ratio of percent sand in sample to percent mud.
producer defined
0.014
0.137
no unit
Gravel to Mud Ratio
ratio of percent gravel in sample to percent mud.
producer defined
0.0
0.0
no unit
D5 Phi
Phi size at D5 for sample, "NA" indicates that no value was calculated.
producer defined
2.316
4.540
Phi size
D10 Phi
Phi size at D10 for sample, "NA" indicates that no value was calculated.
Producer defined
3.329
4.938
Phi size
D16 Phi
Phi size at D16 for sample, "NA" indicates that no value was calculated.
Producer defined
4.533
5.335
Phi size
D25 Phi
Phi size at D25 for sample, "NA" indicates that no value was calculated.
Producer defined
5.229
5.973
Phi size
D50 Phi
Phi size at D50 for sample, "NA" indicates that no value was calculated.
Producer defined
7.02
7.39
Phi size
D75 Phi
Phi size at D75 for sample, "NA" indicates that no value was calculated.
Producer defined
8.598
8.817
Phi size
D84 Phi
Phi size at D84 for sample, "NA" indicates that no value was calculated.
Producer defined
9.301
9.467
Phi size
D90 Phi
Phi size at D90 for sample, "NA" indicates that no value was calculated.
Producer defined
9.833
9.951
Phi size
D95 Phi
Phi size at D95 for sample, "NA" indicates that no value was calculated.
Producer defined
10.346
10.423
Phi size
D5 mm
mm size at D5 for sample, "NA" indicates that no value was calculated.
Producer defined
0.0007
0.0008
millimeters
D10 mm
mm size at D10 for sample, "NA" indicates that no value was calculated.
Producer defined
0.0010
0.0011
millimeters
D16 mm
mm size at D16 for sample, "NA" indicates that no value was calculated.
Producer defined
0.0014
0.0016
millimeters
D25 mm
mm size at D25 for sample, "NA" indicates that no value was calculated.
Producer defined
0.0022
0.0026
millimeters
D50 mm
mm size at D50 for sample, "NA" indicates that no value was calculated.
Producer defined
0.0060
0.0077
millimeters
D75 mm
mm size at D75 for sample, "NA" indicates that no value was calculated.
Producer defined
0.0159
0.0267
millimeters
D84 mm
mm size at D84 for sample, "NA" indicates that no value was calculated.
Producer defined
0.0248
0.0432
millimeters
D90 mm
mm size at D90 for sample, "NA" indicates that no value was calculated.
Producer defined
0.0326
0.0995
millimeters
D95 mm
mm size at D95 for sample, "NA" indicates that no value was calculated.
Producer defined
0.0430
0.2008
millimeters
F-W Median
Phi size median for sample by Folk and Ward (1957) method, "NA" indicates that no value was calculated.
producer defined
7.019964
7.390292
Phi size
F-W Mean
Phi size mean for sample by Folk and Ward (1957) method, "NA" indicates that no value was calculated.
producer defined
6.951370
7.397612
Phi size
F-W Sorting
sorting for sample by Folk and Ward (1957) method, "NA" indicates that no value was calculated.
producer defined
1.925284
2.408530
Phi size
F-W Skewness
skewness for sample by Folk and Ward (1957) method, "NA" indicates that no value was calculated.
producer defined
-0.107344
0.0305160
Phi size
F-W Kurtosis
Kurtosis for sample by Folk and Ward (1957) method, "NA" indicates that no value was calculated.
producer defined
0.803234
0.976966
Phi size
Inman Median
Phi size median for sample by Inman (1952) method, "NA" indicates that no value was calculated.
producer defined
7.019964
7.390292
Phi size
Inman Mean
Phi size mean for sample by Inman (1952) method, "NA" indicates that no value was calculated.
producer defined
6.917074
7.401272
Phi size
Inman Sorting
sorting for sample by Inman (1952) method, "NA" indicates that no value was calculated.
producer defined
2.065848
2.383646
Phi size
Inman Skew 16-84
skewness for sample (D16-D84) by Inman (1952) method, "NA" indicates that no value was calculated.
producer defined
-0.043165
0.009909
Phi size
Inman Skew 05-95
skewness for sample (D5-D95) by Inman (1952) method, "NA" indicates that no value was calculated.
producer defined
-0.288921
0.071828
Phi size
Inman Kurtosis
Kurtosis for sample by Inman (1952) method, "NA" indicates that no value was calculated.
producer defined
0.388415
0.684451
Phi size
Trask Median
mm size median for sample by Trask (1930) method in mm, "NA" indicates that no value was calculated.
producer defined
0.005961
0.007705
millimeters
Trask Mean
mm size mean for sample by Trask (1930) method in mm, "NA" indicates that no value was calculated.
producer defined
0.009072
0.014622
millimeters
Trask Sorting
sorting for sample by Trask (1930) method in mm, "NA" indicates that no value was calculated.
producer defined
2.679840
3.213944
millimeters
Trask Skewness
skewness for sample by Trask (1930) method in mm, "NA" indicates that no value was calculated.
producer defined
0.993968
1.164973
millimeters
Trask Kurtosis
kurtosis for sample by Trask (1930) method in mm, "NA" indicates that no value was calculated.
producer defined
0.122381
0.235789
millimeters
Mean Phi
phi size mean for sample, "NA" indicates that no value was calculated.
producer defined
6.758916
7.399557
Phi size
Mean mm
mm size mean for sample, "NA" indicates that no value was calculated.
producer defined
0.005923
0.009233
millimeters
Variance Phi
variance for sample, "NA" indicates that no value was calculated.
producer defined
3.368779
6.244550
Phi size
Std. Dev. Phi
standard deviation for sample, "NA" indicates that no value was calculated.
producer defined
1.835423
2.498910
Phi size
Skewness Phi
skewness for sample, "NA" indicates that no value was calculated.
producer defined
-0.662683
0.053508
Phi size
Kurtosis Phi
kurtosis for sample, "NA" indicates that no value was calculated.
producer defined
2.077427
3.275506
Phi size
U.S. Geological Survey - ScienceBase
U.S. Geological Survey
mailing and physical
Denver Federal Center, Building 810, Mail Stop 302
Denver
CO
80225
United States
1-888-275-8747
sciencebase@usgs.gov
These data are available in csv format (CSF20_GrainSizeAnalysis_data.csv) accompanied by CSDGM FGDC-compliant metadata.
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.
comma-delimited text
Microsoft Excel 2002 (12527.20988) 64-bit
zip file contains the csv table, associated metadata, and an image map of the study area showing sample locations, grain size summaries, and elevation model
No compression applied
0.12
https://www.sciencebase.gov/catalog/file/get/602a99d4d34eb1203113b187
https://www.sciencebase.gov/catalog/item/602a99d4d34eb1203113b187
https://doi.org/10.5066/P99Q4CHM
Data can be downloaded using the Network_Resource_Name links. The first link is a direct link to download the zipped file of data, metadata, and a map showing sample locations. The second link points to the landing page for the data, metadata, and browse image. The third link points to the landing page for the entire data release, including links to pages of the various data files.
None.
The data are available in comma-separated values (CSV) spreadsheet format. Text editing software can be used to open the file, as well as spreadsheet programs, such as Microsoft Excel.
20211015
PCMSC Science Data Coordinator
U.S. Geological Survey, Pacific Coastal and Marine Science Center
mailing and physical
2885 Mission Street
Santa Cruz
CA
95060
United States
831-427-7520
pcmsc_data@usgs.gov
Content Standard for Digital Geospatial Metadata
FGDC-STD-001-1998