The samples in this dataset were collected and analyzed under the direction of the Massachusetts Water Resources Administration. The data were generated to study the effects of the Boston sewage outflow. Data were previously incorporated into the USGS's Gulf of Maine Contaminated Sediments Database.
The purpose of this data layer is to release a digital version of the data published in Blake et al. (1993), Coats et al. (1994), Coats (1995), and Kropp and Diaz (1995) for interpretation of textural distributions.
publication date
None
384 Woods Hole Road
Please view the cross reference information for the original data set credits, and Larry Poppe for creating the ArcView shapefile.
All attributes were checked by the compilers in a consistent manner.
No additional checks for topological consistency were performed on the data
Identifiers, navigation, and grain-size data are provided for 246 stations.
Navigation was by differential GPS (+/- 10 m)
The source information was imported from an ASCII text file to an ArcView table. The table was later converted to an event theme and saved as the final shapefile.
384 Woods Hole Road
Metadata imported.
Internal feature number.
ESRI
Feature geometry.
ESRI
Unique identifier assigned as part of the Gulf of Maine Contaminated Sediments Database
Compilers
Names used to distinguish between stations
Scientist
Acronym used to identify original project
Compilers
Project abbreviations
Latitude coordinate of sample location
Scientist
Longitude coordinate of sample location
Scientist
Author and year of source reference
Compilers
Equipment used to collect samples
Scientist
Year data were collected
Scientist
Percentage of gravel in sample
Percentage of sand in sample
Scientist
Percentage of silt in sample
Scientist
Percentage of clay in sample
Scientist
Percentage of fines (silt plus clay) in sample
Scientist
Textural classification of sediment based on a scheme devised by Shepard (1954)
Compiler
384 Woods Hole Road
Although this data set has been used by the U.S. Geological Survey, no warranty, expressed or implied, is made by the USGS as to the accuracy of the data and/or 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 materials.
ESRI point shapefile
Five files (mwra.shp, mwra.dbf, mwra.shx, mwra.sbx, mwra.sbn) comprising the ArcView point shapefile components, 'prj' and 'avl' files, metadata text file and browse graphic.
384 Woods Hole Road