 Figure 14. Map showing the station locations used to verify the acoustic data with bottom sampling and photography during the RAFAEL 05007 cruise.

The sediment grainsize dataset provided here contains information on the collection, location, description, and texture of sediments at stations occupied during the verification cruise RAFAEL 05007 (fig. 14). All analyses were conducted in the sedimentation laboratory at the USGS's Woods Hole Science Center. Records without textural data and statistics are based on visual descriptions. The basic structure of the data is in "flatfile" format, a matrix where records are rows representing individual samples and the columns contain sample and stationspecific information. This matrix contains 50 fields which are defined in the Data Dictionary below.
The sediment data are provided in two formats: Microsoft Excel and delimited ASCII text format. In the delimited ASCII text file, each field or column of data is separated from the next by commas and can be downloaded into many types of software.
raf05007_seddata.xls
raf05007_seddata.txt
Data Dictionary
An integral part of any database is the dictionary that explains the structure and content. It contains a list of the fields and the definitions of parameters measured. Data utilization is facilitated by reference to this document because it defines abbreviations and lists field names.
LABNO  Unique sample identifier assigned in the laboratory
STATIONID  Sample name or number as assigned in the field
PROJECTID  Project under which samples were taken or data generated
CRUISEID  Name or number of cruise on which sample collected or station occupied
PRINCIPAL  Name of Principal Investigator
MONTH  Calendar month sample analyzed
DAY  Calendar day sample analyzed
YEAR  Calendar year sample analyzed
LATITUDE  Latitude in decimal degrees
LONGITUDE  Longitude in decimal degrees (west longitudes are negative values)
DEVICE  Device used to collect the sample
AREA  General geographic area
DEPTH_M  Measured depth of water overlying sediment at sample time, not corrected for tides, in meters
T_DEPTH  Top depth of the sample below the sedimentwater interface, in cm
B_DEPTH  Bottom depth of the sample below the sedimentwater interface, in cm
WEIGHT  Weight of sample in grams
ZGRAVEL  Gravel content in percent dry weight of the sample (particles with nominal diameters greater than 2 mm; 1 and larger)
ZSAND  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 through 4 )
ZSILT  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 through 8 , inclusive)
ZCLAY  Clay content in percent dry weight of the sample (particles with nominal diameters less than 0.004 mm; 9 and smaller)
SEDCLASS  Sediment description based on a rigorous definition (Shepard, 1954)
MEDIAN  Middle point in the grain size distribution in phi units
MEAN  Average value in the grain size distribution in phi units
STDDEV  Standard deviation (root mean square of the deviations) of the grain size distribution in phi units (i.e. sorting)
SKEWNESS  Deviation from symmetrical form of the grain size distribution in phi units
KURTOSIS  Degree of curvature near the mode of the grain size distribution in phi units
MODE_1_CLA  First mode (particle size that occurs the most number of times) in phi units
MODE_1_FRE  Modal strength of the first mode in frequency percent
MODE_2_CLA  Second mode in phi units
MODE_2_FRE  Modal strength of the second mode in frequency percent
MODE_3_CLA  Third mode in phi units
MODE_3_FRE  Modal strength of the third mode in frequencypercent
NMODES  Number of modes
PHI_11  Weight percent of the sample in the 11 fraction (nominal diameter of particles greater than or equal to 0.5 µm, but less than 0.001 mm); fine clay
PHI_10  Weight percent of the sample in the 10 fraction (nominal diameter of particles greater than or equal to 0.001 mm, but less than 0.002 mm); medium clay
PHI_9  Weight percent of the sample in the 9 fraction (nominal diameter of particles greater than or equal to 0.002 mm, but less than 0.004 mm); coarse clay
PHI_8  Weight percent of the sample in the 8 fraction (nominal diameter of particles greater than or equal to 0.004 mm, but less than 0.008 mm); very fine silt
PHI_7  Weight percent of the sample in the 7 fraction (nominal diameter of particles greater than or equal to 0.008 mm, but less than 0.016 mm); fine silt
PHI_6  Weight percent of the sample in the 6 fraction (nominal diameter of particles greater than or equal to 0.016 mm, but less than 0.031 mm); medium silt
PHI_5  Weight percent of the sample in the 5 fraction (nominal diameter of particles greater than or equal to 0.031 mm, but less than 0.0625 mm); coarse silt
PHI_4  Weight percent of the sample in the 4 fraction (nominal diameters of particles greater than or equal to .0625 mm, but less than 0.125 mm); very fine sand
PHI_3  Weight percent of the sample in the 3 fraction (nominal diameter of particles greater than or equal to 0.125 mm, but less than 0.25 mm); fine sand
PHI_2  Weight percent of the sample in the 2 fraction (nominal diameter of particles greater than or equal to 0.25 mm, but less than 0.5 mm); medium sand
PHI_1  Weight percent of the sample in the 1 fraction (nominal diameter of particles greater than or equal to 0.5 mm, but less than 1 mm); coarse sand
PHI_0  Weight percent of the sample in the 0 fraction (nominal diameters of particles greater than or equal to 1 mm, but less than 2 mm); very coarse sand
PHIM1  Weight percent of the sample in the 1 fraction (nominal diameter of particles greater than or equal to 2 mm, but less than 4 mm); very fine pebbles (granules)
PHIM2  Weight percent of the sample in the 2 fraction (nominal diameter of particles greater than or equal to 4 mm, but less than 8 mm); fine pebbles
PHIM3  Weight percent of the sample in the 3 fraction (nominal diameter of particles greater than or equal to 8 mm, but less than 16 mm); medium pebbles
PHIM4  Weight percent of the sample in the 4 fraction (nominal diameter of particles greater than or equal to 16 mm, but less than 32 mm); coarse pebbles
PHIM5  Weight percent of the sample in the 5 fraction (nominal diameter of particles greater than or equal to 32 mm; very coarse pebbles to boulders
NOTE: Microsoft Excel software is necessary to view spreadsheets in XLS format.
Title 
Introduction 
Setting 
Methods 
Overview 
Interpretation 
Discussion 
Data Catalog 
Acknowledgments 
References 
Figures 
Bottom Photographs 
Sediment Data 
Contacts
