Sediment texture samples collected within New York Bight 1995 - 1998

Metadata also available as - [Outline] - [Parseable text]

Frequently-anticipated questions:

What does this data set describe?
    Title:
    Sediment texture samples collected within New York Bight 1995 - 1998
    Abstract:
    A better understanding of sediment dynamics in coastal areas can be attained by mapping the surface sediment distribution and subsurface stratigraphy of the lower shoreface and inner-continental shelf. In 1995, the U.S. Geological Survey, in cooperation with the U.S. Army Corps of Engineers, began a program to produce geologic maps of the sea floor throughout the New York Bight Apex using high-resolution sidescan-sonar, subbottom profiling, and sediment sampling techniques. The goals of the investigation are to investigate the role that inner-shelf morphology and geologic framework play in the evolution of the coastal region.

  1. How should this data set be cited?

    U.S. Geological Survey, 2000, Sediment texture samples collected within New York Bight 1995 - 1998:.

     

    This is part of the following larger work.

    Schwab, William C., Denny, Jane F., Foster, David S., Lotto, Linda L., Allison, Mead A., Uchupi, Elazar, Swift, B. Ann, Danforth, William W., Thieler, Robert E., and Butman, Bradford, 2002, High-Resolution Quaternary seismic stratigraphy of the New York Bight Continental Shelf: Open-File Report OFR02-152, U.S. Geological Survey, Woods Hole, MA.

     

  2. What geographic area does the data set cover?

    West_Bounding_Coordinate: -74.06
    East_Bounding_Coordinate: -71.8000
    North_Bounding_Coordinate: 41.2322
    South_Bounding_Coordinate: 40.15

  3. What does it look like?

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

    Beginning_Date: 1995
    Ending_Date: 1998
    Currentness_Reference: ground condition

  5. What is the general form of this data set?

    Geospatial_Data_Presentation_Form: vector digital data

  6. How does the data set represent geographic features?

    1. How are geographic features stored in the data set?

      This is a Vector data set. It contains the following vector data types (SDTS terminology):

      • point

    2. What coordinate system is used to represent geographic features?

      Horizontal positions are specified in geographic coordinates, that is, latitude and longitude. Latitudes are given to the nearest 0.000089992. Longitudes are given to the nearest 0.000089992. Latitude and longitude values are specified in Decimal degrees.

      The horizontal datum used is WGS84.
      The ellipsoid used is WGS84.
      The semi-major axis of the ellipsoid used is 6378137.0000000.
      The flattening of the ellipsoid used is 1/298.26.

  7. How does the data set describe geographic features?

    Sed.shp
    Arcview shapefile (Source: ESRI)

    Shape
    Feature geometry. (Source: ESRI)

    ValueDefinition
    pointfeature geometry name

    Longitude
    x coordinate of feature (Source: ESRI)

    Range of values
    Minimum:-73.85764
    Maximum:-73.82913
    Units:decimal degrees

    Latitude
    location of y coordinate (Source: ESRI)

    Range of values
    Minimum:40.35101
    Maximum:40.42375
    Units:decimal degrees

    Easting
    location of X coordinate in UTM space (Source: ESRI)

    Range of values
    Minimum:550000
    Maximum:750000
    Units:meters

    Northing
    location of Y coordinate in UTM space (Source: ESRI)

    Range of values
    Minimum:4000000
    Maximum:6000000
    Units:meters

    Sample_num
    Sample number; based on Cruise ID (Source: USGS)

    Formal codeset
    Codeset Name:sediment classification
    Codeset Source:Folk

    Gravel
    percentage of gravel within sample (Source: Folk)

    Range of values
    Minimum:0
    Maximum:100
    Units:Percentage of total sample weight

    Sand
    percentage of sand within sample (Source: Folk)

    Range of values
    Minimum:0
    Maximum:100
    Units:Percentage of total sample weight

    Silt
    percentage of gravel within sample (Source: Folk)

    Range of values
    Minimum:0
    Maximum:100
    Units:Percentage of total sample weight

    Clay
    percentage of clay within sample (Source: Folk)

    Range of values
    Minimum:0
    Maximum:100
    Units:Percentage of total sample weight

    SedType
    Sediment Type Classification (Source: Folk)

    Formal codeset
    Codeset Name:Sediment classification
    Codeset Source:Folk

    Mean
    Statistical mean of sample (Source: Folk)

    Range of values
    Minimum:-5.43
    Maximum:7.35
    Units:phi

    Median
    Statistical median of sample (Source: Folk)

    Range of values
    Minimum:-5.30
    Maximum:7.38
    Units:phi

    StDev
    Statistical standard deviation of sample (Source: Folk)

    Range of values
    Minimum:0
    Maximum:3.97
    Units:phi

    Skewness
    Statistical skewness of sample (Source: Folk)

    Range of values
    Minimum:0
    Maximum:6.01
    Units:phi

    Kurtosis
    Statistical kurtosis of sample (Source: Folk)

    Range of values
    Minimum:10.86
    Maximum:155
    Units:phi

    Phi11
    Cummulative weight percent of 11 phi class (Source: Folk)

    Range of values
    Minimum:0
    Maximum:100
    Units:percent

    Phi10
    Cummulative weight percent of 10 phi class (Source: Folk)

    Range of values
    Minimum:0
    Maximum:100
    Units:percent

    Phi9
    Cummulative weight percent of 9 phi class (Source: Folk)

    Range of values
    Minimum:0
    Maximum:100
    Units:percent

    Phi8
    Cummulative weight percent of 8 phi class (Source: Folk)

    Range of values
    Minimum:0
    Maximum:100
    Units:percent

    Phi7
    Cummulative weight percent of 7 phi class (Source: Folk)

    Range of values
    Minimum:0
    Maximum:100
    Units:percent

    Phi6
    Cummulative weight percent of 6 phi class (Source: Folk)

    Range of values
    Minimum:0
    Maximum:100
    Units:percent

    Phi5
    Cummulative weight percent of 5 phi class (Source: Folk)

    Range of values
    Minimum:0
    Maximum:100
    Units:percent

    Phi4
    Cummulative weight percent of 4 phi class (Source: Folk)

    Range of values
    Minimum:0
    Maximum:100
    Units:percent

    Phi3
    Cummulative weight percent of 3 phi class (Source: Folk)

    Range of values
    Minimum:0
    Maximum:100
    Units:percent

    Phi2
    Cummulative weight percent of 2 phi class (Source: Folk)

    Range of values
    Minimum:0
    Maximum:100
    Units:percent

    Phi1
    Cummulative weight percent of 1 phi class (Source: Folk)

    Range of values
    Minimum:0
    Maximum:100
    Units:percent

    Phi0
    Cummulative weight percent of 0 phi class (Source: Folk)

    Range of values
    Minimum:0
    Maximum:100
    Units:percent

    Phi_1
    Cummulative weight percent of -1 phi class (Source: Folk)

    Range of values
    Minimum:0
    Maximum:100
    Units:percent

    Phi_2
    Cummulative weight percent of -2 phi class (Source: Folk)

    Range of values
    Minimum:0
    Maximum:100
    Units:percent

    Phi_3
    Cummulative weight percent of -3 phi class (Source: Folk)

    Range of values
    Minimum:0
    Maximum:100
    Units:percent

    Phi_4
    Cummulative weight percent of -4 phi class (Source: Folk)

    Range of values
    Minimum:0
    Maximum:100
    Units:percent

    Phi_5
    Cummulative weight percent of -5 phi class (Source: Folk)

    Range of values
    Minimum:0
    Maximum:100
    Units:percent

    Entity_and_Attribute_Overview:
    All of the statistical and cummulative weight percentages calculated within the USGS sedimentology laboratory are listed as attributes within these data.
    Entity_and_Attribute_Detail_Citation:
    Poppe, L.J., Eliason, A.H., and Fredricks, J.J, 1985, U.S. Geological Survey Circular 963, 1-77.

Who produced the data set?

  1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)

  2. Who also contributed to the data set?

  3. To whom should users address questions about the data?

Why was the data set created?
In 1995, the U.S. Geological Survey (USGS), in cooperation with the U.S. Army Corps of Engineers (USACE), began a program to generate reconnaissance maps of the sea floor offshore of the New York - New Jersey metropolitan area and within the southern Long Island nearshoe area. Our methods include high-resolution sidescan sonar and subbottom profiling techniques, along with surface grab and vibracore sampling to verify the geophysical interpretations. The goal of the investigation is to provide a regional synthesis of the sea-floor environment, to determine regional-scale availability of sand as a resource for beach nourishment programs, and to investigate the role that inner-shelf morphology and geologic framework have in the evolution of the coastal region within the New York Bight Apex and southern Long Island. Maps derived from interpretation of the subbottom profiles show information on the geometry and distribution of the Quaternary sediments and the underlying coastal-plain unconformity. This seismic stratigraphy yields a regional framework on which explanations of present (and past) sediment movement, dispersal, and erosion processes are based.

How was the data set created?
  1. From what previous works were the data drawn?

    U.S.G.P.O. (source 1 of 1)
    Poppe, Larry, Hastings, Polly, and Polloni, Chris, 2000, USGS EAST-COAST SEDIMENT ANALYSIS: PROCEDURES, DATABASE, AND GEOREFERENCED DISPLAYS: Open-File Report of00-358, U.S. Geological Survey, Reston, VA.

    Online Links:

    Type_of_Source_Media: online and DVDROM
    Source_Contribution: Provided sediment textural data for the New York Bight Apex

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

    Date: 2000 (process 1 of 2)

    The textural data were acquired from the USGS sediment analysis laboratory as an ASCII file. These data were then imported, as a table, into ArcView 3.2. The tabular data were then converted into an ArcView 3.2 shapefile. All of the sediment textural information is contained within the ArcView shapefile as attributes.

    Person who carried out this activity:

    Jane F. Denny
    US Geological Survey
    Geologist
    384 Woods Hole Road
    Woods Hole, MA 02543
    USA

    508-457-2311 (voice)
    508-457-2310 (FAX)
    jdenny@usgs.gov

    Date: 2000 (process 2 of 2)
    The sample data were editted witin ArcView 3.2 to only include those sample locations that fell within the 1995 and 1996 survey areas.

    Person who carried out this activity:

    Jane F. Denny
    US Geological Survey
    Geologist
    384 Woods Hole Road
    Woods Hole, MA 02543
    USA

    508-457-2311 (voice)
    508-457-2310 (FAX)
    jdenny@usgs.gov

  3. What similar or related data should the user be aware of?

How reliable are the data; what problems remain in the data set?
  1. How well have the observations been checked?

    Unknown

  2. How accurate are the geographic locations?

    DGPS is assumed to be accurate within 1-2 meters. Standard GPS is assumed accurate within 5-10 meters. 99% of the positional data is DGPS. Unless noted, all GPS/DGPS data is referenced to WGS84 (NAD83). Offsets were not accounted for GPS antenna to sampler. Therefore, horizontal accuracy for grab samples is assumed to be within +/- 20 meters.

  3. How accurate are the heights or depths?

    Unknown

  4. Where are the gaps in the data? What is missing?

    These data are known to be complete.

  5. How consistent are the relationships among the observations, including topology?

    These data are considered to be logically consistent.

How can someone get a copy of the data set?
Are there legal restrictions on access or use of the data?

Access_Constraints:
None
Use_Constraints:
Please recognize the USGS as the source of these data.

  1. Who distributes the data set? (Distributor 1 of 1)

    Jane F. Denny
    US Geological Survey
    Geologist
    384 Woods Hole Road
    Woods Hole, MA 02543
    USA

    508-457-2311 (voice)
    508-457-2310 (FAX)
    jdenny@usgs.gov

  2. What's the catalog number I need to order this data set?

    sed_of.shp

  3. What legal disclaimers am I supposed to read?

    Altough this data set and its lineage have been used by the USGS, no warranty, expressed or implied, is made by the USGS as to the accuracy of the data and/or it's related materials. 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 items. Users must assume responsibility for the proper use of this data. This data should not be used at resolutions for which it is not intended. This data has no been reviewed for conformity with US Geological Survey editorial standards, or the North American Strigraphic code. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the US Government.

  4. How can I download or order the data?

Who wrote the metadata?
Dates:
Last modified: 19-Jan-2002
Last Reviewed: 2002

Metadata author:
Jane F. Denny
US Geological Survey
Geologist
384 Woods Hole Road
Woods Hole, MA 02543
USA

508-457-2311 (voice)
508-457-2310 (FAX)
jdenny@usgs.gov

Metadata standard:
FGDC Content Standards for Digital Geospatial Metadata (FGDC-STD-001-1998)

Generated by mp version 2.7.17 on Thu Apr 11 12:23:51 2002