U.S. Geological Survey
2018
Location and analysis of sediment samples collected during field activity 2012-035-FA by the U.S. Geological Survey and Massachusetts Office of Coastal Zone Management in Ipswich Bay and Massachusetts Bay, Massachusetts, in August 2012 (point shapefile and CSV file)
1.0
vector and tabular digital data
data release
DOI:10.5066/P924M8R1
Woods Hole Coastal and Marine Science Center, Woods Hole, Massachusetts
U.S. Geological Survey, Coastal and Marine Geology Program
https://doi.org/10.5066/P924M8R1
https://cmgds.marine.usgs.gov/data/field-activity-data/2012-035-FA/
Emily C. Huntley
Seth D. Ackerman
Robert L. Boeri
Todd P. Callaghan
Daniel W. Sampson
Dann S. Blackwood
2018
Sampling data collected in Ipswich Bay and Massachusetts Bay, Massachusetts, in 2012, U.S. Geological Survey Field Activity 2012-035-FA
1.0
data release
DOI:10.5066/P924M8R1
Reston, VA
U.S. Geological Survey
https://doi.org/10.5066/P924M8R1
https://cmgds.marine.usgs.gov/data/field-activity-data/2012-035-FA/
Suggested citation: Huntley, E.C., Ackerman, S.D., Boeri, R.L., Callaghan, T.P., Sampson, D.W., and Blackwood, D.S., 2018, Sampling data collected in Ipswich Bay and Massachusetts Bay, Massachusetts, in 2012, U.S. Geological Survey Field Activity 2012-035-FA: U.S. Geological Survey data release, https://doi.org/10.5066/P924M8R1.
Accurate data and maps of sea-floor geology are important first steps toward protecting habitat, delineating marine resources, and assessing environmental changes due to natural or human effects. Initiated in 2003, the primary objective of the Geologic Mapping of the Massachusetts Sea Floor program is to develop regional geologic framework information for the management of coastal and marine resources. The program is focused on the inshore waters (primarily 5-30 meters deep, although the region surveyed in this field activity includes waters up to 90 meters deep) of Massachusetts. This dataset, collected aboard the Ocean Survey Vessel (OSV) Bold as part of the Geologic Mapping of the Massachusetts Sea Floor Program, is from U.S. Geological Survey (USGS) sampling survey 2012-035-FA (August 21-27, 2012) by the USGS Woods Hole Coastal and Marine Science Center and the Massachusetts Office of Coastal Zone Management with partners from the Massachusetts Bays Program, the Massachusetts Department of Environmental Protection, the Massachusetts Division of Marine Fisheries, and the U.S. Environmental Protection Agency. During the survey, surficial sediment samples and bottom still and video imagery were collected in Ipswich Bay and Massachusetts Bay, Massachusetts.
This dataset includes the locations and grain-size analysis or textural description of surficial sediments collected with a modified Van Veen grab on the SEABed Observation and Sampling System (SEABOSS) during USGS survey 2012-035-FA.
Physical sediment samples were additionally analyzed for benthic infauna by AECOM (see report by the Massachusetts Office of Coastal Zone Management [2013] available from the cross-reference citation). Bottom still and video imagery was also taken at each station (see shapefiles 2012-035-FA_photos.shp and 2012-035-FA_videos.shp available from the larger work citation; see the Coastal and Marine Geology Program Video and Photograph Portal to view the bottom videos [Golden and others, 2015; link available from the cross-reference citation]). For more information about this field activity, see https://cmgds.marine.usgs.gov/fan_info.php?fan=2012-035-FA. For more information about the Geologic Mapping of the Massachusetts Sea Floor program, see https://woodshole.er.usgs.gov/project-pages/coastal_mass/.
20120821
20120827
ground condition
None planned
-70.907127
-70.498603
42.873395
42.296985
None
U.S. Geological Survey
USGS
Coastal and Marine Geology Program
CMGP
Woods Hole Coastal and Marine Science Center
WHCMSC
Massachusetts Office of Coastal Zone Management
MassCZM
MA CZM
CZM
ground-truth
seafloor samples
sediment samples
sediment data
surficial sediment classification
stations
seafloor
sea floor
marine geology
sediments
SEABOSS
SEABed Observation and Sampling System
Van Veen grab sampler
gravel
sand
silt
clay
shapefile
field activity 2012-035-FA
field activity number 12035
OSV Bold
USGS Thesaurus
grab sampling
grain-size analysis
marine geology
sea-floor characteristics
ISO 19115 Topic Category
oceans
geoscientificInformation
location
Marine Realms Information Bank (MRIB) keywords
marine geology
sediment analysis
bay
continental shelf
None
North America
United States
Atlantic Ocean
Gulf of Maine
Bigelow Bight
Massachusetts
Ipswich Bay
Massachusetts Bay
Cape Ann
Plum Island
None
sea floor
seafloor
seabed
None
2012
None
Public domain data from the U.S. Government are freely redistributable with proper metadata and source attribution. Please recognize the U.S. Geological Survey as the originator of the dataset.
Seth Ackerman
U.S. Geological Survey
Geologist
mailing and physical address
384 Woods Hole Rd.
Woods Hole
MA
02543-1598
USA
508-548-8700 x2315
508-457-2310
sackerman@usgs.gov
https://cmgds.marine.usgs.gov/data/field-activity-data/2012-035-FA/data/samples/2012-035-FA_samples_browse.jpg
Thumbnail image of sample locations in Ipswich Bay and Massachusetts Bay, Massachusetts.
JPEG
Microsoft Windows 7 Version 6.1 (Build 7601) Service Pack 1; Esri ArcGIS 10.3.1.4959
Massachusetts Office of Coastal Zone Management
2013
ENV13 CZM 01 Benthic Infaunal Analysis Report
Boston, MA
Massachusetts Office of Coastal Zone Management
https://www.mass.gov/files/documents/2016/08/ws/benthic-infauna-report-2012.pdf
Nadine E. Golden
Seth D. Ackerman
Evan T. Dailey
2015
Coastal and Marine Geology Program video and photograph portal
Santa Cruz, CA
U.S. Geological Survey
https://dx.doi.org/10.5066/F7JH3J7N
National Oceanic and Atmospheric Administration (NOAA) National Centers for Environmental Information (formerly NOAA National Geophysical Data Center)
201110
U.S. Coastal Relief Model
Boulder, CO
NOAA National Centers for Environmental Information
https://www.ngdc.noaa.gov/mgg/coastal/crm.html
D. Blackwood
K. Parolski
2001
Seabed observation and sampling system
1.0
Sea Technology
v. 42, no. 2, p. 39-43
Arlington, VA
Compass Publications, Inc.
L.J. Poppe
K.Y. McMullen
S.J. Williams
V.F. Paskevich
2014
USGS east-coast sediment analysis: Procedures, database, and GIS data
3.0
Open-File Report
2005-1001
Reston, VA
U.S. Geological Survey
https://pubs.usgs.gov/of/2005/1001/
F.P. Shepard
1954
Nomenclature based on sand-silt-clay ratios
Journal of Sedimentary Petrology
v. 24, no. 3., p. 151-158
Tulsa, OK
Society of Economic Paleontologists and Mineralogists
https://doi.org/10.1306/D4269774-2B26-11D7-8648000102C1865D
J.S. Schlee
1973
Atlantic continental shelf and slope of the United States - sediment texture of the northeastern part
Professional Paper
529-L
Reston, VA
U.S. Geological Survey
https://pubs.er.usgs.gov/publication/pp529L
All attributes were evaluated during data processing as standard quality control to ensure attributes contain accurate and relevant information and values.
The physical sediment samples were all collected with the same modified Van Veen grab sampler mounted on the InterOcean SEABOSS. The station numbers (FIELD_NO) were determined before the survey and are not necessarily in sequential order of when they were occupied. Gaps in sequential station numbers exist as not all planned stations were occupied during the survey. No additional checks for topological consistency were performed on these data.
All 350 stations that were occupied during USGS survey 2012-035-FA are included in this dataset; however, physical sediment samples were only collected at 219 of the 350 stations. Sediment samples were only attempted in areas where collecting a sample would not damage the SEABOSS; therefore, no samples were collected in areas with a cobble, boulder, or rocky seabed, as identified in real time using the top-side live video feed. At one site (station 115), a sample was attempted in what appeared in the real-time video as mud, but the sampler got caught in a net and no sample was successfully collected. The 131 stations with no physical sediment sample were classified by USGS geologists based on the visual observation of the bottom still and video imagery taken during the sampler deployment, which is noted in the comments field for these stations. Note that the term "sediment samples" used herein may be used to describe physical samples as well as stations where the bottom type was determined by visual observation and no physical sediment sample was collected.
Navigation for survey 2012-035-FA used Differential Global Positioning System (DGPS). The DGPS was set to receive fixes at a two-second interval in geographic coordinates (World Geodetic System of 1984 [WGS 84]). The recorded position of each sediment sample is the position of the DGPS antenna on the survey vessel, not the SEABOSS sampler. The antenna was mounted at the top of the vessel's A-frame from which the sampler was deployed, within a few meters of the sampler (+/- 3 meters). No layback or offset was applied to the recorded position. In addition to the +/- 3-meter offset, the sampler may drift away from the survey vessel when deployed to the sea floor. Based on the various sources of horizontal offsets, a conservative estimate of the horizontal accuracy of the sediment sample locations is 10 meters. The visual observation sediment samples are generally located along the bottom video trackline at the start of the sampler retrieval; the sampler retrieval position was chosen as the sample location because the video clip is considered the sample in the absence of a physical sample. Twenty-nine of the 131 visual observation stations did not intersect a bottom video trackline and were moved to the last navigation fix along the station's bottom video trackline (stations 6, 8, 9, 13, 14, 23, 26, 33, 34, 45, 67, 76, 77, 97, 151, 214, 219, 224, 258, 260, 264, 265, 266, 271, 272, 278, 308, and 310) or to the last bottom image if the recorded video was cut short (station 125).
The depths recorded for each sample were derived from the National Oceanic and Atmospheric Administration (NOAA) U.S. Coastal Relief Model. See the original data to determine the vertical accuracy of these depth values (link available from the cross-reference citation).
U.S. Geological Survey
Unpublished Material
Sediment sample locations with sediment grain-size analysis and navigation data
tabular digital data
disc
20120821
20120827
ground condition
Sediment sample locations with sediment grain-size analysis and raw navigation files
Sediment samples were acquired using the InterOcean SEABOSS. The sediment data and the observations from video and still cameras are used to explore the nature of the sea floor and, in conjunction with high-resolution geophysical data, to make interpretive maps of sedimentary environments and validate acoustic remote sensing data. The InterOcean SEABOSS incorporates a downward-looking video camera, a still camera, and a modified Van Veen sediment sampler. The elements of this particular SEABOSS system are held within a stainless-steel frame that measures 1.15 x 1.15 meters. The frame has a stabilizer fin that orients the system as it drifts over the seabed. The OSV Bold occupied one of the target stations and the SEABOSS was deployed off the vessel's A-frame on the stern of the ship. The vessel and sampler drifted with wind and current for up to a few minutes to ensure a decent image with a clear view of the sea floor and then at most stations the sea floor was sampled with the SEABOSS's integrated Van Veen grab. Sediment samples were only attempted in areas where collecting a sample would not damage the SEABOSS; therefore, no samples were collected in areas with a cobble, boulder, or rocky seabed, as identified in real time using the top-side live video feed. The system was then raised and recovered to the deck of the survey vessel. DGPS navigation from a Garmin GPSMAP 76CSx receiver was logged through a Microsoft HyperTerminal (version 5.1) session on a Dell Latitude D820 laptop computer running Windows XP SP2 via serial cable and was also recorded to the audio channel of the video files. The DGPS was set to receive fixes at a two-second interval in geographic coordinates (WGS 84). Log files were saved approximately for each Julian day in ASCII text format.
Three hundred fifty stations were occupied aboard the OSV Bold during USGS survey 2012-035-FA with the InterOcean SEABOSS (Blackwood and Parolski, 2001). The SEABOSS was equipped with a Van Veen grab sampler, a still camera, and a downward-looking video camera. Physical sediment samples were collected at 219 of the 350 stations. Times for the sampler retrieval, which would later be used to derive the sample locations, were manually recorded in the logbook from the DGPS receiver when the sampler was lifted from the seabed (the Van Veen sampler closed and collected a sample as it was lifted off the sea floor). Once the sampler was recovered, the sample was divided in the Van Veen grab using an acrylic sheet. One side was used for grain-size analysis, while the other side was processed for benthic infaunal analysis by AECOM (see report by the Massachusetts Office of Coastal Zone Management [2013] available from the cross-reference citation).
201208
Physical sediment samples
Logbook
Seth Ackerman
U.S. Geological Survey
Geologist
mailing and physical address
384 Woods Hole Rd.
Woods Hole
MA
02543-1598
USA
508-548-8700 x2315
508-457-2310
sackerman@usgs.gov
DGPS navigation from a Garmin GPSMAP 76CSx receiver was logged through a Microsoft HyperTerminal (version 5.1) session on a Dell Latitude D820 laptop computer running Windows XP SP2 via serial cable. The DGPS was set to receive fixes at a two-second interval in geographic coordinates (WGS 84). Log files were saved approximately for each Julian day in ASCII text format. Dates and times were recorded in UTC. The original log files were reformatted into log files by full Julian day based on UTC time. An AWK script (awkseth.gprmc.12035.awk) was run on the log files to parse for the GPRMC navigation string and create ASCII Comma Separated Value (CSV) text files. The output files were merged and then reformatted using an AWK script (nav_time_reformat.awk), creating a final processed navigation file for the entire sampling survey.
Raw navigation files
201209
Processed two-second navigation file
Seth Ackerman
U.S. Geological Survey
Geologist
mailing and physical address
384 Woods Hole Rd.
Woods Hole
MA
02543-1598
USA
508-548-8700 x2315
508-457-2310
sackerman@usgs.gov
The sediment samples were geolocated by linking the sampler retrieval time, which was recorded in the logbook as the VOFFB (vehicle off bottom) time, to the corresponding time in the navigation file.
Logbook
Processed two-second navigation file
201210
Sediment sample locations CSV file
Seth Ackerman
U.S. Geological Survey
Geologist
mailing and physical address
384 Woods Hole Rd.
Woods Hole
MA
02543-1598
USA
508-548-8700 x2315
508-457-2310
sackerman@usgs.gov
Samples were analyzed in the sediment laboratory at the USGS Woods Hole Coastal and Marine Science Center. The coarse fraction was determined by sieve; the fine fraction was determined using a Coulter Counter. See Poppe and others (2014) for analytical specifics for grain-size measurement processes. Sediment statistics and sample locations were recorded in Microsoft Excel and saved as a CSV file.
Physical sediment samples
Sediment sample locations CSV file
201211
Sediment grain-size analysis CSV file
Kate McMullen
U.S. Geological Survey
Geologist
mailing and physical address
384 Woods Hole Rd.
Woods Hole
MA
02543-1598
USA
508-548-8700
508-457-2310
A shapefile was created using the sediment grain-size analysis CSV file in Esri ArcGIS (version 10.2). Stations with no physical sediment sample were included in the shapefile and classified by USGS geologists based on the visual observation of the bottom still and video imagery taken during the sampler deployment.
Sediment grain-size analysis CSV file
201402
Sediment grain-size analysis shapefile
Seth Ackerman
U.S. Geological Survey
Geologist
mailing and physical address
384 Woods Hole Rd.
Woods Hole
MA
02543-1598
USA
508-548-8700 x2315
508-457-2310
sackerman@usgs.gov
The visual observation sediment samples are generally located along the bottom video trackline at the start of the sampler retrieval; the sampler retrieval position was chosen as the sample location because the video clip is considered the sample in the absence of a physical sample. When creating the bottom video tracklines shapefile, the manually recorded sampler retrieval times for some stations were replaced with more precise video end times obtained from the audio channel of the video files. As a result, 29 of the 131 visual observation stations did not intersect a bottom video trackline and were moved in Esri ArcGIS (version 10.3.1); these stations were moved to the last navigation fix along the bottom video trackline (stations 6, 8, 9, 13, 14, 23, 26, 33, 34, 45, 67, 76, 77, 97, 151, 214, 219, 224, 258, 260, 264, 265, 266, 271, 272, 27, 308, and 310) or to the last bottom photo if the recorded video was cut short (station 125). The latitude and longitude of the edited points were calculated using the Calculate Geometry tool (Property=Y Coordinate of Point and X Coordinate of Point, respectively; Use coordinate system of the data source=WGS 1984; Unit=Decimal Degrees). XTools Pro (version 12.0) for Esri ArcGIS was used to edit field types in the point shapefile (Table Operations - Table Restructure). The field calculator in Esri ArcGIS was used to add a no data value (-9999) to empty numeric attributes in the attribute table as needed. The shapefile's attribute table was exported and saved as a CSV file. The FID field was deleted in the CSV file.
Sediment grain-size analysis shapefile
Bottom video tracklines shapefile (2012-035-FA_videos.shp)
Bottom still imagery shapefile (2012-035-FA_photos.shp)
Processed two-second navigation file
201711
Final sediment grain-size analysis shapefile
Final sediment grain-size analysis CSV file
Emily Huntley
U.S. Geological Survey
Geographer/Database Specialist
mailing and physical address
384 Woods Hole Rd.
Woods Hole
MA
02543-1598
USA
508-548-8700
508-457-2310
ehuntley@usgs.gov
Vector
Entity point
350
0.00000001
0.00000001
Decimal degrees
D_WGS_1984
WGS_1984
6378137.000000
298.257224
2012-035-FA_samples
Sample locations and textural analysis for samples collected during USGS survey 2012-035-FA in Ipswich Bay and Massachusetts Bay, Massachusetts, in 2012.
U.S. Geological Survey
FID
Internal feature number.
Esri
Sequential unique whole numbers that are automatically generated.
Shape
Feature geometry.
Esri
Coordinates defining the features.
GROUP
Sample group number assigned to data by USGS sediment laboratory based on source.
Modified from USGS East-Coast Sediment Texture Database data dictionary
3
Sediment entirely or partially analyzed, processed, or visually described by USGS Woods Hole scientists; most samples analyzed in the USGS Woods Hole Sediment Laboratory.
USGS East-Coast Sediment Texture Database data dictionary
DB_ID
Database identifier assigned by sediment laboratory.
Modified from USGS East-Coast Sediment Texture Database data dictionary
Character string.
FIELD_NO
Sample name or number as assigned in the field by the Chief Scientist.
USGS East-Coast Sediment Texture Database data dictionary
Character string.
PROJECT
Survey area of the research project.
Modified from USGS East-Coast Sediment Texture Database data dictionary.
Character sting.
CRUISE_ID
Name or number of cruise on which sample collected. Historically cruise identifiers were a combination of ship name, year of cruise, and cruise leg. In more recent years, cruise identifier is a sequential serial number assigned to field activities within a specific year (in the format YYYY-XXX-FA where YYYY is the survey year, XXX is the cruise number within that year, and FA is Field Activity).
Modified from USGS East-Coast Sediment Texture Database data dictionary
Character string.
CONTACT
Name of Principal Investigator or Chief Scientist responsible for data collection (usually first initial and last name).
USGS East-Coast Sediment Texture Database data dictionary
Character string.
AREA
Regional research focus for USGS survey 2012-035-FA.
Modified from USGS East-Coast Sediment Texture Database data dictionary
Character string.
LATITUDE
Latitude coordinate, in decimal degrees (WGS 84), of sample location. South latitude is recorded as negative values.
Modified from USGS East-Coast Sediment Texture Database data dictionary
42.29698500
42.87339500
decimal degrees
0.00000001
LONGITUDE
Longitude coordinate, in decimal degrees (WGS 84), of sample location. West longitude is recorded as negative values.
Modified from USGS East-Coast Sediment Texture Database data dictionary
-70.90712670
-70.49860330
decimal degrees
0.00000001
DEPTH_M
Depth in meters extracted from the NOAA U.S. Coastal Relief Model data.
Modified from USGS East-Coast Sediment Texture Database data dictionary
11.0
87.3
meters
0.1
T_DEPTH
Top depth of the sub-sample collected from the whole grab sample below the sediment-water interface in centimeters. No data value is -9999.
Modified from USGS East-Coast Sediment Texture Database data dictionary
0
0
centimeters
B_DEPTH
Bottom depth of the sub-sample collected from the whole grab sample below the sediment-water interface in centimeters. No data value is -9999.
Modified from USGS East-Coast Sediment Texture Database data dictionary
2
2
centimeters
DEVICE
Device used to collect the sample.
Modified from USGS East-Coast Sediment Texture Database data dictionary
Character string.
MONTH_COLL
Calendar month sample collected based on time in UTC.
Modified from USGS East-Coast Sediment Texture Database data dictionary
8
8
months
1
DAY_COLL
Calendar day sample collected based on time in UTC.
Modified from USGS East-Coast Sediment Texture Database data dictionary
21
27
days
1
YEAR_COLL
Calendar year sample collected based on time in UTC.
Modified from USGS East-Coast Sediment Texture Database data dictionary
2012
2012
years
1
MONTH_ANAL
Calendar month sample analyzed. No data value is -9999.
Modified from USGS East-Coast Sediment Texture Database data dictionary
11
11
months
1
DAY_ANAL
Calendar day sample analyzed. No data value is -9999.
Modified from USGS East-Coast Sediment Texture Database data dictionary
28
28
days
1
YEAR_ANAL
Calendar year sample analyzed. No data value is -9999.
Modified from USGS East-Coast Sediment Texture Database data dictionary
2012
2012
years
1
WEIGHT
Weight of dry sample in grams. No data value is -9999.
Modified from USGS East-Coast Sediment Texture Database data dictionary
16.7942
246.6600
grams
0.0001
GRAVEL_PCT
Gravel content in percent dry weight of the sample (particles with nominal diameters greater than 2 mm; -1 phi and larger). No data value is -9999.
Modified from USGS East-Coast Sediment Texture Database data dictionary
0
74.51
percent
0.01
SAND_PCT
Sand content in percent dry weight of the sample (particles with nominal diameters less than 2 mm, but greater than or equal to 0.0625 mm; 0 phi through 4 phi, inclusive). No data value is -9999.
Modified from USGS East-Coast Sediment Texture Database data dictionary
5.39
99.69
percent
0.01
SILT_PCT
Silt content in percent dry weight of the sample (particles with nominal diameters less than 0.0625 mm, but greater than or equal to 0.004 mm; 5 phi through 8 phi, inclusive). No data value is -9999.
Modified from USGS East-Coast Sediment Texture Database data dictionary
0.18
70.51
percent
0.01
CLAY_PCT
Clay content in percent dry weight of the sample (particles with nominal diameters less than 0.004 mm; 9 phi and smaller). No data value is -9999.
Modified from USGS East-Coast Sediment Texture Database data dictionary
0.08
34.49
percent
0.01
CLASSIFICA
Sediment classification based on a rigorous definition (Shepard [1954] as modified by Schlee [1973] and Poppe and others [2014]). For stations where a physical sample was not collected, the classification was based on visual analysis by USGS geologists of the bottom still and video imagery taken during the sampler deployment. In the definitions below, gravel is defined as particles with nominal diameters greater than 2 mm; sand consists of particles with nominal diameters less than 2 mm, but greater than or equal to 0.0625 mm; silt consists of particles with nominal diameters less than 0.0625 mm, but greater than or equal to 0.004 mm; and clay consists of particles with nominal diameters less than 0.004 mm.
Modified from USGS East-Coast Sediment Texture Database data dictionary
CLAYEY SILT
Silt less than 75 percent and equal to or greater than 50 percent, clay greater than sand, and sand less than 20 percent.
USGS East-Coast Sediment Texture Database data dictionary
GRAVEL
Gravel equal to or greater than 50 percent.
USGS East-Coast Sediment Texture Database data dictionary
GRAVELLY SEDIMENT
Gravel equal to or greater than 10 percent, but less than 50 percent.
USGS East-Coast Sediment Texture Database data dictionary
MUD
Mud (silt plus clay) equal to or greater than 50 percent based on visual observation.
U.S. Geological Survey
SAND
Sand equal to or greater than 75 percent.
USGS East-Coast Sediment Texture Database data dictionary
SAND SILT CLAY
Clay, sand, and silt greater than 20 percent each.
USGS East-Coast Sediment Texture Database data dictionary
SANDY SILT
Silt less than 75 percent and equal to or greater than 50 percent, sand greater than clay, and clay less than 20 percent.
USGS East-Coast Sediment Texture Database data dictionary
SILTY SAND
Sand less than 75 percent and equal to or greater than 50 percent, silt greater than clay, and clay less than 20 percent.
USGS East-Coast Sediment Texture Database data dictionary
MEDIAN
Middle point in the grain-size distribution in phi units. No data value is -9999.
Modified from USGS East-Coast Sediment Texture Database data dictionary
-4.20
7.34
phi
0.01
MEAN
Average value in the grain-size distribution in phi units. No data value is -9999.
Modified from USGS East-Coast Sediment Texture Database data dictionary
-2.37
7.06
phi
0.01
STDEV
Standard deviation (root mean square of the deviations) of the grain-size distribution in phi units (sorting). No data value is -9999.
Modified from USGS East-Coast Sediment Texture Database data dictionary
0.44
4.65
phi
0.01
SKEWNESS
Skewness (deviation from symmetrical form) of the grain-size distribution where positive values show an excess of fine-grained sediments and negative values show an excess of coarse-grained sediments. No data value is -9999.
Modified from USGS East-Coast Sediment Texture Database data dictionary
-0.45
5.30
unitless
0.01
KURTOSIS
Kurtosis (degree of curvature near the mode) of the grain-size distribution. No data value is -9999.
Modified from USGS East-Coast Sediment Texture Database data dictionary
-1.44
144.45
unitless
0.01
MODE1CLASS
First mode (particle size that occurs the most number of times) in phi units.
USGS East-Coast Sediment Texture Database data dictionary
-9999 (representing no data for this field).
MODE1FREQ
Modal strength of the first mode in percent.
USGS East-Coast Sediment Texture Database data dictionary
-9999 (representing no data for this field).
MODE2CLASS
Second mode in phi units.
USGS East-Coast Sediment Texture Database data dictionary
-9999 (representing no data for this field).
MODE2FREQ
Modal strength of the second mode in percent.
USGS East-Coast Sediment Texture Database data dictionary
-9999 (representing no data for this field).
MODE3CLASS
Third mode in phi units.
USGS East-Coast Sediment Texture Database data dictionary
-9999 (representing no data for this field).
MODE3FREQ
Modal strength of the third mode in percent.
USGS East-Coast Sediment Texture Database data dictionary
-9999 (representing no data for this field).
NMODES
Number of modes.
USGS East-Coast Sediment Texture Database data dictionary
-9999 (representing no data for this field).
PHIm5
Weight percent of the sample in the -5-phi fraction and larger (nominal diameter of particles greater than or equal to 32 mm); very coarse pebbles, cobbles, and boulders. No data value is -9999.
Modified from USGS East-Coast Sediment Texture Database data dictionary
0
0
percent
0.01
PHIm4
Weight percent of the sample in the -4-phi fraction (nominal diameter of particles greater than or equal to 16 mm, but less than 32 mm); coarse pebbles. No data value is -9999.
Modified from USGS East-Coast Sediment Texture Database data dictionary
0
62.49
percent
0.01
PHIm3
Weight percent of the sample in the -3-phi fraction (nominal diameter of particles greater than or equal to 8 mm, but less than 16 mm); medium pebbles. No data value is -9999.
Modified from USGS East-Coast Sediment Texture Database data dictionary
0
26.13
percent
0.01
PHIm2
Weight percent of the sample in the -2-phi fraction (nominal diameter of particles greater than or equal to 4 mm, but less than 8 mm); fine pebbles. No data value is -9999.
Modified from USGS East-Coast Sediment Texture Database data dictionary
0
29.58
percent
0.01
PHIm1
Weight percent of the sample in the -1-phi fraction (nominal diameter of particles greater than or equal to 2 mm, but less than 4 mm); very fine pebbles (granules). No data value is -9999.
Modified from USGS East-Coast Sediment Texture Database data dictionary
0
40.11
percent
0.01
PHI_0
Weight percent of the sample in the 0-phi fraction (nominal diameters of particles greater than or equal to 1 mm, but less than 2 mm); very coarse sand. No data value is -9999.
Modified from USGS East-Coast Sediment Texture Database data dictionary
0.01
41.54
percent
0.01
PHI_1
Weight percent of the sample in the 1-phi fraction (nominal diameter of particles greater than or equal to 0.5 mm, but less than 1 mm); coarse sand. No data value is -9999.
Modified from USGS East-Coast Sediment Texture Database data dictionary
0.02
81.40
percent
0.01
PHI_2
Weight percent of the sample in the 2-phi fraction (nominal diameter of particles greater than or equal to 0.25 mm, but less than 0.5 mm); medium sand. No data value is -9999.
Modified from USGS East-Coast Sediment Texture Database data dictionary
0.10
61.82
percent
0.01
PHI_3
Weight percent of the sample in the 3-phi fraction (nominal diameter of particles greater than or equal to 0.125 mm, but less than 0.25 mm); fine sand. No data value is -9999.
Modified from USGS East-Coast Sediment Texture Database data dictionary
0.12
74.09
percent
0.01
PHI_4
Weight percent of the sample in the 4-phi fraction (nominal diameters of particles greater than or equal to 0.0625 mm, but less than 0.125 mm); very fine sand. No data value is -9999.
Modified from USGS East-Coast Sediment Texture Database data dictionary
0.02
92.53
percent
0.01
PHI_5
Weight percent of the sample in the 5-phi fraction (nominal diameter of particles greater than or equal to 0.031 mm, but less than 0.0625 mm); coarse silt. No data value is -9999.
Modified from USGS East-Coast Sediment Texture Database data dictionary
0.04
18.99
percent
0.01
PHI_6
Weight percent of the sample in the 6-phi fraction (nominal diameter of particles greater than or equal to 0.016 mm, but less than 0.031 mm); medium silt. No data value is -9999.
Modified from USGS East-Coast Sediment Texture Database data dictionary
0.03
18.06
percent
0.01
PHI_7
Weight percent of the sample in the 7-phi fraction (nominal diameter of particles greater than or equal to 0.008 mm, but less than 0.016 mm); fine silt. No data value is -9999.
Modified from USGS East-Coast Sediment Texture Database data dictionary
0.05
29.21
percent
0.01
PHI_8
Weight percent of the sample in the 8-phi fraction (nominal diameter of particles greater than or equal to 0.004 mm, but less than 0.008 mm); very fine silt. No data value is -9999.
Modified from USGS East-Coast Sediment Texture Database data dictionary
0.05
27.05
percent
0.01
PHI_9
Weight percent of the sample in the 9-phi fraction (nominal diameter of particles greater than or equal to 0.002 mm, but less than 0.004 mm); coarse clay. No data value is -9999.
Modified from USGS East-Coast Sediment Texture Database data dictionary
0.04
18.67
percent
0.01
PHI_10
Weight percent of the sample in the 10-phi fraction (nominal diameter of particles greater than or equal to 0.001 mm, but less than 0.002 mm); medium clay. No data value is -9999.
Modified from USGS East-Coast Sediment Texture Database data dictionary
0.02
10.59
percent
0.01
PHI_11
Weight percent of the sample in the 11-phi fraction and smaller (nominal diameter of particles less than 0.001 mm); fine clay. No data value is -9999.
Modified from USGS East-Coast Sediment Texture Database data dictionary
0.02
5.23
percent
0.01
ANALYST
Name (usually first initial and last name) of person who analyzed the sediment samples in the sediment lab.
Modified from USGS East-Coast Sediment Texture Database data dictionary
Character string.
ANAL_COMM
Any further information about sediment analysis for all or specific parameters in this table.
USGS East-Coast Sediment Texture Database data dictionary
Character string.
LITHOLOGY
Description of physical characteristics of the sample, if appropriate.
Modified from USGS East-Coast Sediment Texture Database data dictionary.
Character string.
COMMENTS
Comments on sample collection or lithology. Visual observation of bottom type was made from bottom still and video imagery for this survey.
USGS East-Coast Sediment Texture Database data dictionary
Character string.
The CSV file has the same attributes, except for FID (which is not included), with the same definitions.
U.S. Geological Survey
Seth Ackerman
U.S. Geological Survey
Geologist
mailing and physical address
384 Woods Hole Rd.
Woods Hole
MA
02543-1598
USA
508-548-8700 x2315
508-457-2310
sackerman@usgs.gov
USGS data release 2012-035-FA contains sediment sample locations and grain-size analysis collected offshore of Massachusetts in Ipswich Bay and Massachusetts Bay (2012-035-FA_samples.zip). The zip file contains the following files: a shapefile of the sediment sample locations and analysis (2012-035-FA_samples.shp); a CSV file of the sediment sample locations and analysis (2012-035-FA_samples.csv); a browse graphic of sediment sample locations (2012-035-FA_samples_browse.jpg); and Federal Geographic Data Committee (FGDC) Content Standard for Digital Geospatial Metadata (CSDGM) metadata files in three standard formats (2012-035-FA_samples_meta.html, 2012-035-FA_samples_meta.txt, and 2012-035-FA_samples_meta.xml).
Neither the U.S. Government, the Department of the Interior, nor the USGS, nor any of their employees, contractors, or subcontractors, make any warranty, express or implied, nor assume any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, nor represent that its use would not infringe on privately owned rights. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the USGS in the use of these data or related materials. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government.
Shapefile
Esri ArcGIS 10.3.1
Shapefile
The zip file contains a shapefile and CSV file of sediment sample locations and grain-size analysis collected by the U.S. Geological Survey Woods Hole Coastal and Marine Science Center and Massachusetts Office of Coastal Zone Management in Ipswich Bay and Massachusetts Bay, Massachusetts, in 2012 and the associated metadata.
Use WinZip, 7-Zip, PeaZip, PKUNZIP, or other uncompressing software
0.2
https://cmgds.marine.usgs.gov/data/field-activity-data/2012-035-FA/data/samples/2012-035-FA_samples.zip
https://doi.org/10.5066/P924M8R1
https://cmgds.marine.usgs.gov/data/field-activity-data/2012-035-FA/
The first link is a direct link to download the zip file of the data and metadata. The second and third links are for the field activity data page where additional datasets from this survey are available.
CSV
Microsoft Excel 2016 for Mac
Comma Separated Value (CSV) text file
The zip file contains a shapefile and CSV file of the sediment sample locations and grain-size analysis collected by the U.S. Geological Survey Woods Hole Coastal and Marine Science Center and Massachusetts Office of Coastal Zone Management in Ipswich Bay and Massachusetts Bay, Massachusetts, in 2012 and the associated metadata.
Use WinZip, 7-Zip, PeaZip, PKUNZIP, or other uncompressing software
0.2
https://cmgds.marine.usgs.gov/data/field-activity-data/2012-035-FA/data/samples/2012-035-FA_samples.zip
https://doi.org/10.5066/P924M8R1
https://cmgds.marine.usgs.gov/data/field-activity-data/2012-035-FA/
The first link is a direct link to download the zip file of the data and metadata. The second and third links are for the field activity data page where additional datasets from this survey are available.
none
This zip file contains data available as a point shapefile and CSV file. The user must have software capable of reading shapefile format to use the point shapefile. The CSV file can be read with a text editor.
20180823
Emily Huntley
U.S. Geological Survey
Geographer/Database Specialist
mailing and physical address
384 Woods Hole Rd.
Woods Hole
MA
02543-1598
USA
508-548-8700
508-457-2310
ehuntley@usgs.gov
FGDC Content Standard for Digital Geospatial Metadata
FGDC-STD-001-1998
local time