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Third Quarter Cruise News: R/V G.K. Gilbert
6/24-7/1: Transited from Murrel's Inlet, SC, to Lake Okeechobee in South Florida to examine the lake bottom and edges with sidescan and seismic surveys. The purpose was to test penetration and interpretability of single-channel seismic data in organic-rich sediments. The data were used to map the underlying strata and showed that the lake basin was not formed by a bolide impact, which had been proposed as a possible origin for the 35-mi-wide lake. Jack Kindinger conducted the survey with Dana Wiese. 7/20-7/30: Dry dock in St. Pete, FL, for annual maintenance to hull and jets. 8/3: Demonstrated how well a new high-resolution Chirp sonar works in 40 ft of water over a ledge 12 nmi off Tampa Bay as part of a reef-building investigation conducted by Dr. Gregg Brooks of Eckerd College's Marine Science Program. 8/4-8/18: Removed deck crane for sandblasting and painting, and cut out and refit new under-deck support structure. 8/19: Deployed a bottom current-sensing acoustic doppler profiler to assess the sediment transport off Sarasota, FL. The University of South Florida's Department of Marine Science's Coastal Ocean Monitoring Prediction System, under Dr. Robert Weisberg, uses several of these types of instruments along Florida's west coast (out to 80 nmi) to enable modeling of coastal water-circulation patterns. 8/22-8/30: Transited to Panama City, FL, to take 10 vibracores for the Office of Naval Research, then moved 45 nmi west and took 10 more off Destin, FL. 9/1: Recovered the acoustic doppler profiler system deployed on 8/19 off Sarasota, FL, and then picked up a deep-water instrumented buoy in Venice, FL, that broke free of its mooring 60 nmi offshore. The buoy was towed in by a local fisherman. 9/23: Took 12 Eckerd College Marine Science students out to St. Pete Beach to gain some hands-on experience with the vibracorer (see related story in this issue).
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in this issue:
Cruise News
Earth Science Week in Woods Hole |
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U. S. Department of the Interior | U.S. Geological Survey
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