Sediments off Cape Ann to Cape Cod, MA acquired in 1973 (SCHLEE73 shapefile)

Online link https://cmgds.marine.usgs.gov/catalog/whcmsc/open_file_report/ofr2003-001/schlee73.shp.faq.html
Description The reconnaissance maps upon which this data set is based show the areal distribution of the major bottom sediment types covering the sea floor off Massachusetts between Cape Ann and Cape Cod. The maps were intended as a guide to the future mapping of gravel, sand, silt, and clay, and, because these sediments reflect the hydraulic conditions, they are also helpful for deducing the important sediment transport mechanisms.
Originators Poppe, Lawrence J.; Paskevich, Valerie F.; Williams, S. Jeffress; Hastings, Mary E.; Kelley, John T.; Belknap, D. F.; Ward, Larry G.; Fitzgerald, D. M.; and Larsen, Peter F.

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Thumbnail image showing extent and distribution of data layer coverage.
Thumbnail image showing extent and distribution of data layer coverage.