Marine Geoscience Data System
NCShelf_Walsh Sediment:Description
Grain-size data of surface sediment samples from the North Carolina shelf post-Hurricane Florence (2019 survey)
Hurricane Florence made landfall as a Category 1 near Wilmington, NC on the morning of September 14, 2018. Hurricane-force winds were experienced over a large region, yielding powerful storm surge and waves over 8 m offshore. The overarching objective of the project was to collect seafloor mapping data and sediment samples over a previously surveyed portion of the Morehead City Ocean Dredged Material Disposal Site (ODMDS) to assess shelf sediment reworking associated with Hurricane Florence. The project collected geophysical data and sediment grab samples over a portion of the ODMDS offshore of Bogue Banks, NC in early 2019. Twenty-one surface sediment samples collected on February 26, 2019 were analyzed with a laser diffraction Mastersizer 3000 instrument. Percentages were adjusted for the pre-sieved gravel (>2 mm) fraction. The data files are in ASCII comma-separated format, with column headers. Funding was provided by an NSF RAPID grant titled "RAPID: Examining Seafloor Dynamics offshore Bogue Banks, North Carolina, Related to Hurricane Florence", Award OCE 1906073 to lead investigator J.P. Walsh.
Device Info
Benthos (Boat)
Geodynamics LLC
The data have been processed/modified to a level beyond that of basic quality control (e.g. final processed sonar data, photo-mosaics).

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