Amy E. East
Angela C. Tan
Leticia Hallas
Jessica L. Williamson
20230615
Grain size and charcoal abundance in sediment samples from Los Padres reservoir, Carmel River watershed, California
comma-delimited text
data release
DOI:10.5066/P9C7NKM4
Pacific Coastal and Marine Science Center, Santa Cruz, California
U.S. Geological Survey
Suggested Citation: East, A.E., Tan, A.C., Hallas, L., and Williamson, J.L., 2023, Grain size and charcoal abundance in sediment samples from Los Padres reservoir, Carmel River watershed, California: U.S. Geological Survey data release, https://doi.org/10.5066/ P9C7NKM4.
https://doi.org/10.5066/P9C7NKM4
Sediment samples were collected from Los Padres reservoir in the Carmel River watershed, central California coast, between July 11 and 17, 2017, using a CME-45 barge-mounted drill rig, to characterize sedimentary properties in the reservoir deposits following the Soberanes Fire of 2016 and high river flows in winter 2017. Borehole samples were recovered using direct push coring with an Osterberg piston sampler operated by Taber Drilling Company of Sacramento, California, and overseen by AECOM, Inc. Sediment was recovered using a split-barrel sampler and a rotary drill bit was added to the sampler where needed to penetrate coarse sediment. Samples from four boreholes are described in this data release: three sampled at multiple sediment depths (B2, B3, and B7) and a fourth (B4) from which only the topmost sample is included. Each borehole was drilled to the depth of apparent pre-dam alluvium or bedrock. Alternate sections were described and sampled; every second section was discarded without examination. Sediment samples were analyzed for grain size and charcoal abundance at the U.S. Geological Survey (USGS) laboratories in Santa Cruz, California. This data set complements data analyzed and presented by AECOM, Inc., for the Los Padres Alternatives Study Technical Memorandum prepared for the Monterey Peninsula Water Management District in October 2017 (https://www.mpwmd.net/asd/board/committees/watersupply/2018/20180123/02/Item-2-Exh-C.pdf). The USGS gratefully acknowledges collaboration with B. Kozlowicz of AECOM in the collection of these data.
Laboratory measurements of sediment grain sizes and charcoal abundance in Los Padres reservoir, Carmel River watershed, California, to characterize post-fire sedimentation history.
Additional information about the USGS field activity or activities from which these data were derived is available online at:
https://cmgds.marine.usgs.gov/fan_info.php?fan=2017-635-FA
Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government.
20170713
20170714
20170716
days of sample collection
None planned
-121.666476
-121.664314
36.383113
36.380511
ISO 19115 Topic Category
geoscientificInformation
environment
inlandWaters
Data Categories for Marine Planning
Data Content Subjects
Nonliving Resources
USGS Thesaurus
earth sciences
datasets
field inventory and monitoring
grain-size analysis
Marine Realms Information Bank (MRIB) keywords
coastal change hazards topics
None
U.S. Geological Survey
USGS
Coastal and Marine Hazards and Resources Program
CMHRP
Pacific Coastal and Marine Science Center
PCMSC
USGS Metadata Identifier
USGS:641df3c9d34e807d39b7c0a0
Geographic Names Information System (GNIS)
Carmel River
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 as the originator(s) 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
831-427-4747
pcmsc_data@usgs.gov
https://www.sciencebase.gov/catalog/file/get/641df3c9d34e807d39b7c0a0?name=IMG_5248.JPG&allowOpen=true
Borehole drilling on Los Padres resevoir
JPEG
USGS gratefully acknowledges collaboration with B. Kozlowicz (AECOM).
Excel
Beckman-Coulter
2011
Instructions for Use: LS 13 320 Laser Diffraction Particle Size Analyzer
Beckman-Coulter, 2011, Instructions for Use: LS 13 320 Laser Diffraction Particle Size Analyzer: Brea, Calif., Beckman-Coulter, 246 p.
https://www.beckmancoulter.com/wsrportal/techdocs?docname=b05577ab.pdf
Robert E. Carver
1971
Procedures in Sedimentary Petrology
Carver, R.E., 1971, Procedures in Sedimentary Petrology: Wiley Interscience, New York: 49-94.
https://tamug-ir.tdl.org/handle/1969.3/21450
E. E. Collias
M. R. Rona
D. A. McManus
J. S. Creager
1963
Machine Processing of Geological Data
Collias, E.E., Rona, M.R., McManus, D.A., and Creager, J.S., 1963, Machine processing of geological data: Department of Oceanography, University of Washington, Technical Report No. 87, 119 p.
https://apps.dtic.mil/sti/pdfs/AD0423746.pdf
Edythe E. Engleman
Larry L. Jackson
Daniel R. Norton
1985
Determination of carbonate carbon in geological materials by coulometric titration
Engleman, E.E., Jackson, L.L., and Norton, D.R., 1985, Determinations of Carbonate Carbon in Geological Materials by Coulometric Titration: Chemical Geology, 53, 125-128.
https://doi.org/10.1016/0009-2541(85)90025-7
Robert Louis Folk
1974
Petrology of Sedimentary Rocks
Folk, R.L., 1974, Petrology of Sedimentary Rocks: Hemphill Publishing Co., Austin, TX, 182 p.
https://tamug-ir.tdl.org/handle/1969.3/21435
Robert Louis Folk
1980
Petrology of Sedimentary Rocks
Folk, R.L., 1980, Petrology of Sedimentary Rocks: Hemphill Publishing Co., Austin, TX, 184 p.
https://repositories.lib.utexas.edu/bitstream/handle/2152/22930/folkpetrology.pdf?sequence=3
Robert Louis Folk
1966
A review of grain-size parameters
Folk, R.L.,1966, A review of grain-size parameters: Sedimentology, 6, 73-93.
https://doi.org/10.1111/j.1365-3091.1966.tb01572.x
Robert Louis Folk
William C. Ward
1957
Brazos River bar; a study in the significance of grain size parameters
Folk, R.L., and Ward, W.C., 1957, Brazos River bar; a study in the significance of grain size parameters: Journal of Sedimentary Research, 27, 3-26.
https://doi.org/10.1306/74D70646-2B21-11D7-8648000102C1865D
Douglas Lamar Inman
1952
Measures for describing the size distribution of sediments
Inman, D.L., 1952, Measures for describing the size distribution of sediments: Journal of Sedimentary Research, 22, 125-145.
https://doi.org/10.1306/D42694DB-2B26-11D7-8648000102C1865D
J.M. Jaquet
J.P. Vernet
1976
Moment and graphic size parameters in sediments of Lake Geneva (Switzerland)
Jaquet J.M., and Vernet J.P., 1976, Moment and graphic size parameters in sediments of Lake Geneva (Switzerland): Journal of Sedimentary Petrology, 46, 305-312.
https://doi.org/10.1306/212F6F46-2B24-11D7-8648000102C1865D
Penscil Inc.
2015
pcSDSZ: Sediment Size Analysis Software for Windows Operation Manual Version 2.00, prepared for USGS Coastal and Marine Geology
Penscil Inc., 2015, pcSDSZ: Sediment Size Analysis Software for Windows Operation Manual Version 2.00, prepared for USGS Coastal and Marine Geology. Unpublished document.
J. Syvitski
1991
Principles, Methods, and Applications of Particle Size Analysis
Syvitski, J., 1991, Principles, Methods, and Applications of Particle Size Analysis: Cambridge University Press, New York, USA. 292 p.
https://doi.org/10.1017/CBO9780511626142
Parker D. Trask
1930
Mechanical analyses of sediments by centrifuge
Trask, P.D., 1930, Mechanical analyses of sediments by centrifuge: Economic Geology, 25, p. 581-599.
https://doi.org/10.2113/gsecongeo.25.6.581
Parker D. Trask
1932
Origin and environment of source sediments of petroleum
Trask, P. D., 1932, Origin and environment of source sediments of petroleum: Gulf Publishing Company, Houston, Texas. 323 p.
https://www.cambridge.org/core/journals/journal-of-the-marine-biological-association-of-the-united-kingdom/article/abs/origin-and-environment-of-source-sediments-of-petroleum-by-d-trask-parker-assisted-by-harold-e-hammar-and-c-c-wu-gulf-publishing-co-houston-texas-323-pp-1932/E4212BACC9A798808CC166A1DE4CF691#article
UIC Inc.
2022
Operation Manual Model CM5017 CO2 Coulometer
UIC Inc., Operation Manual Model CM5017 CO2 Coulometer, Joliet, IL, 2.0, 28-30.
UIC Inc.
2022
Operation Manual Model CM5200 Autosampler Furnace
UIC Inc., Operation Manual Model CM5200 Autosampler Furnace, Joliet, IL, 2.4, 13 p.
Lysanna Anderson
Liuboc Presnetsova
David B. Wahl
Geoffrey Phelps
Alan Gous
2022
Assessing Reproducibility in Sedimentary Macroscopic Charcoal Count Data
Anderson, L., Presnetsova, L., Wahl, D.B., Phelps, G., and Gous, A., 2022, Assessing reproducibility in sedimentary macroscopic charcoal count data. Quaternary Research 111, 177–196. https://doi.org/10.1017/qua.2022.43
https://doi.org/10.1017/qua.2022.43
For grain-size analyses, annual service tests and daily calibrations with reference standards ensured that the Beckman Coulter LS 13 320 operated within specifications (Beckman-Coulter, 2011). Each sample was analyzed three times by the instrument and the data were averaged. In addition, a lab procedural duplicate was run with each batch of samples to ensure consistency and values were within 15 percent. For total carbon and total inorganic carbon analyses, duplicates were run for each sample and the results were averaged. PCMSC ensured that the instrument was within specifications by running blanks and pure, reagent-grade calcium carbonate standard before and after every 10 samples. A lab procedural duplicate was run with each batch of samples to ensure consistency and values were within 15 percent. The duplicate carbon values were within 15 percent.
Data values are within the expected values.
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.
Reported geographic coordinates of sites are estimated to be within 5 meters.
GRAIN-SIZE ANALYSIS: Grain-size analysis was conducted by the USGS Pacific Coastal and Marine Science Center (PCMSC) sediment lab using a Beckman Coulter LS 13 320 particle size analyzer with an aqueous liquid module attachment. PCMSC procedures are modified from those described in Carver (1971) and Folk (1974, 1980). 5-50 grams of sediment was sub-sampled and at least 10 milliliters of 30 percent hydrogen peroxide was added to oxidize overnight to remove organics. The samples were then heated to 250 degrees Celsius to drive off excess hydrogen peroxide. Next, samples were placed in an ultrasonic bath to help disperse silt and clay (mud) from sand and larger-sized particles. Samples were then rinsed twice in deionized water with centrifugation to remove soluble ions. Subsequently, the samples were wet sieved with 1 millimeter and 0.063 millimeter sieves to segregate the combined gravel and coarse sand fraction (greater than 1 millimeter), sand (1 millimeter to 0.063 millimeter), and mud (less than 0.063 millimeter). The coarse sand + gravel fractions were then dried, dry sieved at 1/4phi intervals and weighed (Carver, 1971). The sand fraction was dried and weighed. The mud fraction was collected in a 1 liter graduated cylinder, 5 milliliters of at least 10 percent sodium hexametaphosphate (dispersant) was added, and deionized water was added to bring the total the volume to 1 liter. The mud + dispersant solution sat overnight to ensure complete dispersion and to observe if flocculation occurred. Subsequently, a 20 milliliter aliquot was extracted from the graduated cylinder and dried to obtain the mud fraction weight normalized to a 1-liter basis. The mud and sand fractions were analyzed separately via the Beckman Coulter LS 13 320 with the aqueous liquid module attachment. All size fraction data were compiled and converted by the PCMSC sediment lab pcSDSZ program (Penscil, 2015) to a grain-size distribution at 1/4phi size intervals on a weight percent basis. pcSDSZ also calculated interpolated sizes and graphical statistics on a percent coarser basis (Folk and Ward, 1957; Folk, 1966; Folk, 1974, 1980; Inman, 1952; Trask, 1930, 1932) and moment measures (Collias and others, 1963; Jaquet and Vernet, 1976; Folk 1980).
20221229
INTERPOLATED SIZES: Grain sizes at select cumulative percentage values (D) were calculated by the PCMSC Sediment Lab software pcSDSZ version 1.71 on a percent coarser basis, which summed from coarse to fine bins. D values were interpolated between phi bins bracketing the specified D value. Grain sizes were converted into units of millimeters (mm) using the formula mm=reciprocal of 2(exponent)phi or (phi=-log2(mm)). Interpolated grain sizes at D5, D10, D16, D25, D50, D75, D84, D90, and D95 are reported in phi and millimeter units.
20221229
CHARCOAL ANALYSIS: Charcoal abundance was analyzed in 1.23-milliliter sediment samples that had been sub-sampled from dry sediment samples. The 1.23-ml sub-samples were treated with 6 percent sodium hypochlorite solution (bleach), slowly agitating the samples and bleach together in a 50-ml test tube for two hours. Samples were then wet-sieved at 125 microns, and the fraction coarser than 125 microns was washed into disposable petri dishes and oven-dried at 50 degrees C. Once dried, the samples were examined under a binocular microscope at 15x magnification using a gridded background to facilitate thorough, accurate counting coverage. Charcoal particles were counted by one technician to ensure consistency. These methods are based on those of Anderson and others, 2022.
20221229
Point
Point
45
0.00001
0.00001
Decimal Degrees
North American Datum of 1983
Geodetic Reference System 80
6378137.0
298.257223563
Attribute table
Table of data
producer defined
Sample_ID
Name of sample
producer defined
unique identifier for each sample
Date_Collected
Date of sample collection
producer defined
2017-07-13
2017-07-16
yyyy-mm-dd
Longitude_NAD83
Longitude of sample collection in decimal degrees
producer defined
-121.66648
-121.66431
decimal degrees
0.00001
Latitude_NAD83
Latitude of sample collection in decimal degrees
producer defined
36.38051
36.38311
decimal degrees
0.00001
Midpoint_depth_cm
Depth of sample location in centimeters
producer defined
3
1654
centimeters
Field_description_of_sampled_sedimentary_layer
Sample description, texture, grain size, etc.
producer defined
text to describe the sample
Charcoal_count
Abundance of charcoal particles in a sample of known volume
producer defined
0
1856
count
-4.00phi_16mm
Weight percent of sample with grain diameter greater than -4.00 phi, or 16 mm
producer defined
0
0
percentage
-3.75phi_13.5mm
Weight percent of sample with grain diameter between -4.00 and -3.75 phi, or 13.5 and 16 mm
producer defined
0
0
percentage
-3.50phi_11.2mm
Weight percent of sample with grain diameter between -3.75 and -3.50 phi, or 11.2 and 13.5 mm
producer defined
0
0
percentage
-3.25phi_9.51mm
Weight percent of sample with grain diameter between -3.50 and -3.25 phi, or 9.51 and 11.2 mm
producer defined
0
0
percentage
-3.00phi_8mm
Weight percent of sample with grain diameter between -3.25 and -3.00 phi, or 8 and 9.51 mm
producer defined
0
0
percentage
-2.75phi_6.73mm
Weight percent of sample with grain diameter between -3.00 and -2.75 phi, or 6.73 and 8 mm
producer defined
0
0
percentage
-2.50phi_5.66mm
Weight percent of sample with grain diameter between -2.75 and -2.50 phi, or 5.66 and 6.73 mm
producer defined
0
6.71
percentage
-2.25phi_4.76mm
Weight percent of sample with grain diameter between -2.50 and -2.25 phi, or 4.76 and 5.66 mm
producer defined
0
4.08
percentage
-2.00phi_4mm
Weight percent of sample with grain diameter between -2.25 and -2.00 phi, or 4 and 4.76 mm
producer defined
0
5.74
percentage
-1.75phi_3.36mm
Weight percent of sample with grain diameter between -2.00 and -1.75 phi, or 3.36 and 4 mm
producer defined
0
3.44
percentage
-1.50phi_2.83mm
Weight percent of sample with grain diameter between -1.75 and -1.50 phi, or 2.83 and 3.36 mm
producer defined
0
6.28
percentage
-1.25phi_2.38mm
Weight percent of sample with grain diameter between -1.50 and -1.25 phi, or 2.38 and 2.83 mm
producer defined
0
5.36
percentage
-1.00phi_2mm
Weight percent of sample with grain diameter between -1.25 and -1.00 phi, or 2 and 2.38 mm
producer defined
0
8.41
percentage
-0.75phi_1.68mm
Weight percent of sample with grain diameter between -1.00 and -0.75 phi, or 1.68 and 2 mm
producer defined
0
7.39
percentage
-0.50phi_1.41mm
Weight percent of sample with grain diameter between -0.75 and -0.50 phi, or 1.41 and 1.68 mm
producer defined
0
13.54
percentage
-0.25phi_1.19mm
Weight percent of sample with grain diameter between -0.50 and -0.25 phi, or 1.19 and 1.41 mm
producer defined
0
12.44
percentage
0.00phi_1mm
Weight percent of sample with grain diameter between -0.25 and 0.00 phi, or 1 and 1.19 mm
producer defined
0
11.51
percentage
0.25phi_0.8409mm
Weight percent of sample with grain diameter between 0.00 and 0.25 phi, or 0.8409 and 1 mm
producer defined
0
6.19
percentage
0.50phi_0.7071mm
Weight percent of sample with grain diameter between 0.25 and 0.50 phi, or 0.7071 and 0.8409 mm
producer defined
0
6.83
percentage
0.75phi_0.5946mm
Weight percent of sample with grain diameter between 0.50 and 0.75 phi, or 0.5946 and 0.7071 mm
producer defined
0
6.67
percentage
1.00phi_0.5mm
Weight percent of sample with grain diameter between 0.75 and 1.00 phi, or 0.5 and 0.5946 mm
producer defined
0
8.54
percentage
1.25phi_0.4204mm
Weight percent of sample with grain diameter between 1.00 and 1.25 phi, or 0.4204 and 0.5 mm
producer defined
0
9.90
percentage
1.50phi_0.3536mm
Weight percent of sample with grain diameter between 1.25 and 1.50 phi, or 0.3536 and 0.4204 mm
producer defined
0
10.53
percentage
1.75phi_0.2973mm
Weight percent of sample with grain diameter between 1.50 and 1.75 phi, or 0.2973 and 0.3536 mm
producer defined
0
11.02
percentage
2.00phi_0.25mm
Weight percent of sample with grain diameter between 1.75 and 2.00 phi, or 0.25 and 0.2973 mm
producer defined
0
10.65
percentage
2.25phi_0.2102mm
Weight percent of sample with grain diameter between 2.00 and 2.25 phi, or 0.2102 and 0.25 mm
producer defined
0
9.35
percentage
2.50phi_0.1768mm
Weight percent of sample with grain diameter between 2.25 and 2.50 phi, or 0.1768 and 0.2102 mm
producer defined
0
9.94
percentage
2.75phi_0.1487mm
Weight percent of sample with grain diameter between 2.50 and 2.75 phi, or 0.1487 and 0.1768 mm
producer defined
0
11.39
percentage
3.00phi_0.125mm
Weight percent of sample with grain diameter between 2.75 and 3.00 phi, or 0.125 and 0.1487 mm
producer defined
0
11.72
percentage
3.25phi_0.1051mm
Weight percent of sample with grain diameter between 3.00 and 3.25 phi, or 0.1051 and 0.125 mm
producer defined
0
10.73
percentage
3.50phi_0.088388mm
Weight percent of sample with grain diameter between 3.25 and 3.50 phi, or 0.088388 and 0.1051 mm
producer defined
0
8.75
percentage
3.75phi_0.074325mm
Weight percent of sample with grain diameter between 3.50 and 3.75 phi, or 0.074325 and 0.088388 mm
producer defined
0
8.42
percentage
4.00phi_0.0625mm
Weight percent of sample with grain diameter between 3.75 and 4.00 phi, or 0.0625 and 0.074325 mm
producer defined
0
7.9
percentage
4.25phi_0.052556mm
Weight percent of sample with grain diameter between 4.00 and 4.25 phi, or 0.052556 and 0.0625 mm
producer defined
0
7.95
percentage
4.50phi_0.044194mm
Weight percent of sample with grain diameter between 4.25 and 4.50 phi, or 0.044194 and 0.052556 mm
producer defined
0
7.66
percentage
4.75phi_0.037163mm
Weight percent of sample with grain diameter between 4.50 and 4.75 phi, or 0.037163 and 0.044194 mm
producer defined
0
8.36
percentage
5.00phi_0.03125mm
Weight percent of sample with grain diameter between 4.75 and 5.00 phi, or 0.03125 and 0.037163 mm
producer defined
0
8.54
percentage
5.25phi_0.026278mm
Weight percent of sample with grain diameter between 5.00 and 5.25 phi, or 0.026278 and 0.03125 mm
producer defined
0
7.98
percentage
5.50phi_0.022097mm
Weight percent of sample with grain diameter between 5.25 and 5.50 phi, or 0.022097 and 0.026278 mm
producer defined
0
7.07
percentage
5.75phi_0.018581mm
Weight percent of sample with grain diameter between 5.50 and 5.75 phi, or 0.018581 and 0.022097 mm
producer defined
0
6.18
percentage
6.00phi_0.015625mm
Weight percent of sample with grain diameter between 5.75 and 6.00 phi, or 0.015625 and 0.018581 mm
producer defined
0
5.68
percentage
6.25phi_0.013139mm
Weight percent of sample with grain diameter between 6.00 and 6.25 phi, or 0.013139 and 0.015625 mm
producer defined
0
5.41
percentage
6.50phi_0.011049mm
Weight percent of sample with grain diameter between 6.25 and 6.50 phi, or 0.011049 and 0.013139 mm
producer defined
0
5
percentage
6.75phi_0.009291mm
Weight percent of sample with grain diameter between 6.50 and 6.75 phi, or 0.009291 and 0.011049 mm
producer defined
0
4.75
percentage
7.00phi_0.007813mm
Weight percent of sample with grain diameter between 6.75 and 7.00 phi, or 0.007813 and 0.009291 mm
producer defined
0
4.51
percentage
7.25phi_0.00657mm
Weight percent of sample with grain diameter between 7.00 and 7.25 phi, or 0.00657 and 0.007813 mm
producer defined
0
4.18
percentage
7.50phi_0.005524mm
Weight percent of sample with grain diameter between 7.25 and 7.50 phi, or 0.005524 and 0.00657 mm
producer defined
0
3.87
percentage
7.75phi_0.004645mm
Weight percent of sample with grain diameter between 7.50 and 7.75 phi, or 0.004645 and 0.005524 mm
producer defined
0
3.46
percentage
8.00phi_0.003906mm
Weight percent of sample with grain diameter between 7.75 and 8.00 phi, or 0.003906 and 0.004645 mm
producer defined
0
3.14
percentage
8.25phi_0.003285mm
Weight percent of sample with grain diameter between 8.00 and 8.25 phi, or 0.003285 and 0.003906 mm
producer defined
0
2.82
percentage
8.50phi_0.002762mm
Weight percent of sample with grain diameter between 8.25 and 8.50 phi, or 0.002762 and 0.003285 mm
producer defined
0
2.46
percentage
8.75phi_0.002323mm
Weight percent of sample with grain diameter between 8.50 and 8.75 phi, or 0.002323 and 0.002762 mm
producer defined
0
2.2
percentage
9.00phi_0.001953mm
Weight percent of sample with grain diameter between 8.75 and 9.00 phi, or 0.001953 and 0.002323 mm
producer defined
0
1.97
percentage
9.25phi_0.001642mm
Weight percent of sample with grain diameter between 9.00 and 9.25 phi, or 0.001642 and 0.001953 mm
producer defined
0
1.79
percentage
9.50phi_0.001381mm
Weight percent of sample with grain diameter between 9.25 and 9.50 phi, or 0.001381 and 0.001642 mm
producer defined
0
1.63
percentage
9.75phi_0.001161mm
Weight percent of sample with grain diameter between 9.50 and 9.75 phi, or 0.001161 and 0.001381 mm
producer defined
0
1.52
percentage
9.99phi_0.000983mm
Weight percent of sample with grain diameter between 9.75 and 9.99 phi, or 0.000983 and 0.001161 mm
producer defined
0
1.34
percentage
10.25phi_0.000821mm
Weight percent of sample with grain diameter between 9.99 and 10.25 phi, or 0.000821 and 0.000983 mm
producer defined
0
1.26
percentage
10.50phi_0.000691mm
Weight percent of sample with grain diameter between 10.25 and 10.50 phi, or 0.000691 and 0.000821 mm
producer defined
0
1.04
percentage
10.75phi_0.000581mm
Weight percent of sample with grain diameter between 10.50 and 10.75 phi, or 0.000581 and 0.000691 mm
producer defined
0
0.82
percentage
10.99phi_0.000492mm
Weight percent of sample with grain diameter between 10.75 and 10.99 phi, or 0.000492 and 0.000581 mm
producer defined
0
0.57
percentage
11.25phi_0.000411mm
Weight percent of sample with grain diameter between 10.99 and 11.25 phi, or 0.000411 and 0.000492 mm
producer defined
0
0.32
percentage
11.48phi_0.00035mm
Weight percent of sample with grain diameter between 11.25 and 11.48 phi, or 0.00035 and 0.000411 mm
producer defined
0
0.07
percentage
12.02phi_0.000241mm
Weight percent of sample with grain diameter between 11.48 and 12.02 phi, or 0.000241 and 0.00035 mm
producer defined
0
0
percentage
13.02phi_0.00012mm
Weight percent of sample with grain diameter between 12.02 and 13.02 phi, or 0.00012 and 0.000241 mm
producer defined
0
0
percentage
Percent_Gravel
percent of sample greater than 2 mm
producer defined
0
31.51
percentage
Percent_Sand
percent of sample less than 2 mm and greater than 63 microns
producer defined
7.67
93.71
percentage
Percent_Silt
percent of sample less than 63 microns and greater than 4 microns
producer defined
1.85
80.36
percentage
Percent_Clay
percent of sample less than 4 microns
producer defined
0.16
19.81
percentage
Percent_Mud
percent of sample less than 63 microns
producer defined
2.02
92.33
percentage
Gravel_to_Sand_ratio
ratio of percent gravel in sample to percent sand
producer defined
0
0.47
dimensionless
Sand_to_Silt_ratio
ratio of percent sand in sample to percent silt
producer defined
0.1
35.89
dimensionless
Silt_to_Clay_ratio
ratio of percent silt in sample to percent clay
producer defined
3.46
15.07
dimensionless
Sand_to_Clay_ratio
ratio of percent sand in sample to percent clay
producer defined
0.5
406.69
dimensionless
Sand_to_Mud_ratio
ratio of percent sand in sample to percent mud
producer defined
0.08
32.98
dimensionless
Gravel_to_Mud_ratio
ratio of percent gravel in sample to percent mud
producer defined
0
15.63
dimensionless
D5_percent_coarser_in_phi
Phi size at D5 in percent coarser
producer defined
-2.45
3.8
Phi size
D10_percent_coarser_in_phi
Phi size at D10 in percent coarser
producer defined
-2.19
4.17
Phi size
D16_percent_coarser_in_phi
Phi size at D16 in percent coarser
producer defined
-1.59
4.48
Phi size
D25_percent_coarser_in_phi
Phi size at D25 in percent coarser
producer defined
-1.18
4.86
Phi size
D50_percent_coarser_in_phi
Phi size at D50 in percent coarser
producer defined
-0.53
6.18
Phi size
D75_percent_coarser_in_phi
Phi size at D75 in percent coarser
producer defined
-0.02
7.6
Phi size
D84_percent_coarser_in_phi
Phi size at D84 in percent coarser
producer defined
0.46
8.35
Phi size
D90_percent_coarser_in_phi
Phi size at D90 in percent coarser
producer defined
0.9
9.05
Phi size
D95_percent_coarser_in_phi
Phi size at D95 in percent coarser
producer defined
1.79
9.83
Phi size
D95_percent_coarser_in_mm
mm size at D95 in percent coarser
producer defined
0
0.29
millimeters
D90_percent_coarser_in_mm
mm size at D90 in percent coarser
producer defined
0
0.54
millimeters
D84_percent_coarser_in_mm
mm size at D84 in percent coarser
producer defined
0
0.73
millimeters
D75_percent_coarser_in_mm
mm size at D75 in percent coarser
producer defined
0.01
1.01
millimeters
D50_percent_coarser_in_mm
mm size at D50 in percent coarser
producer defined
0.01
1.45
millimeters
D25_percent_coarser_in_mm
mm size at D25 in percent coarser
producer defined
0.03
2.27
millimeters
D16_percent_coarser_in_mm
mm size at D16 in percent coarser
producer defined
0.04
3
millimeters
D10_percent_coarser_in_mm
mm size at D10 in percent coarser
producer defined
0.06
4.55
millimeters
D5_percent_coarser_in_mm
mm size at D5 in percent coarser
producer defined
0.07
5.45
millimeters
Folk_Ward_Median_percent_coarser
median for sample by Folk and Ward (1957) method
producer defined
-0.53
6.18
Phi size
Folk_Ward_Mean_percent_coarser
mean for sample by Folk and Ward (1957) method
producer defined
-0.55
6.29
Phi size
Folk_Ward_Sorting_percent_coarser
sorting for sample by Folk and Ward (1957) method
producer defined
1.09
3.07
dimensionless
Folk_Ward_Skewness_percent_coarser
skewness for sample by Folk and Ward (1957) method
producer defined
-0.12
0.44
dimensionless
Folk_Ward_Kurtosis_percent_coarser
kurtosis for sample by Folk and Ward (1957) method
producer defined
0.82
1.69
dimensionless
Inman_Median_percent_coarser
median for sample by Inman (1952) method
producer defined
-0.53
6.18
Phi size
Inman_Mean_percent_coarser
mean for sample by Inman (1952) method
producer defined
-0.57
6.34
Phi size
Inman_Sorting_percent_coarser
sorting for sample by Inman (1952) method
producer defined
0.98
3.19
dimensionless
Inman_Skew_16_84_percent_coarser
skewness for sample (D16-D84) by Inman (1952) method
producer defined
-0.22
0.41
dimensionless
Inman_Skew_05_95_percent_coarser
skewness for sample (D05-D95) by Inman (1952) method
producer defined
-0.5
1.12
dimensionless
Inman_Kurtosis_percent_coarser
kurtosis for sample by Inman (1952) method
producer defined
0.53
1.5
dimensionless
Trask_Median_percent_coarser
median for sample by Trask (1930) method
producer defined
0.01
1.45
millimeters
Trask_Mean_percent_coarser
mean for sample by Trask (1930) method
producer defined
0.02
1.64
millimeters
Trask_Sorting_percent_coarser
sorting for sample by Trask (1930) method
producer defined
1.5
5.42
dimensionless
Trask_Skewness_percent_coarser
skewness for sample by Trask (1930) method
producer defined
0.62
3.09
dimensionless
Trask_Kurtosis_percent_coarser
kurtosis for sample by Trask (1930) method
producer defined
0.12
0.29
dimensionless
1_Moment_Mean_Phi
First Moment measure
producer defined
-0.43
6.12
Phi size
1_Moment_Mean_mm
First Moment measure
producer defined
0.01
1.35
millimeters
2_Moment_Variance
Second Moment measure
producer defined
1.89
8.98
dimensionless
2_Moment_Standard_Deviation
Second Moment measure
producer defined
1.37
3
Phi size
3_Moment_Skewness
Third Moment measure
producer defined
-0.7
2.13
dimensionless
4_Moment_Kurtosis
Fourth Moment measure
producer defined
2.37
11.9
dimensionless
The first line of the csv file is a header line.
U.S. Geological Survey
U.S. Geological Survey - ScienceBase
mailing and physical
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sciencebase@usgs.gov
These data are available in csv format (LosPadres_grainsize_and_charcoal_abundance_data.csv), which also includes CSDGM FGDCcompliant 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
Excel Version 2208
LosPadres_grainsize_and_charcoal_abundance_data.csv
No compression applied.
0.03331
https://www.sciencebase.gov/catalog/file/get/641df3c9d34e807d39b7c0a0
https://doi.org/10.5066/P9C7NKM4
Data can be downloaded using the Network_Resource_Name links. The first link is a direct link to download a zipped file of data and metadata. The second link points to the landing page for the entire data release.
None.
These data can be viewed with any text-reading or spreadsheet software.
20230615
U.S. Geological Survey, Pacific Coastal and Marine Science Center
PCMSC Science Data Coordinator
mailing and physical
2885 Mission Street
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Content Standard for Digital Geospatial Metadata
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