Collect sediment cores at one station in Boston Harbor (Hingham Bay) for pore water analysis and for lab-based erosion studies.
Location
Hingham Bay, Boston Harbor, Massachusetts, United States, North America, North Atlantic;
Summary
The divers collected the required samples with excellent quality and in a short amount of time. We used a kayak to make a 3-point mooring which was very effective in holding the boat on location. This gave us perfect conditions to test the pole corer in these sediments with poor results as described below. RAFAEL was launched near Hingham on October 10 and tied up overnight at a floating dock next to the Ferry Boat dock. The pole core was tried twice without satisfactory results. For pole cores we restricted penetration to about 30 cm to fit the sediment core into the erosion chamber. This did not penetrate firm enough sediment to make a plug of mud at the bottom of the core (the surface had very high water content). The sample partially fell out of the bottom of the barrel before we could get the piston into the barrel just below the sea surface using Dann's long arm. The push corer worked ok in Falmouth Harbor sediments with a barrel pushed in to maximum sediment depth. Approximately 7 cores were collected by divers and processed in the laboratory for pore water profiles, erosion experiments and resistivity.
Info derived
Samples and chemical analysis;
Comments
Original Center People field contained: D. Blackwood (boat captain and diving consultant); R. Rendigs and S. Baldwin (divers); Mike Bothner (chief scientist).
Project = Coastal Geologic Processes and Long-Term Environmental Change, Coastal Geologic Processes and Long-Term Environmental Change
