Identifier | 1987-027-FA | ||||||||
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Alternate names | DISC 87-1 | ||||||||
Purpose | Collection of high-resolution seismic reflection data in order to define the geology and shallow structure of the Chesapeake Bay. | ||||||||
Location | Cove Point, Sandy Point, northern Chesapeake Bay, Maryland, United States, North America, North Atlantic; | ||||||||
Summary | The cruise was very successful and was blessed with extremely good weather. A total of 378 nm (700 km) of tracklines was covered. The seismic reflection records obtained were very good except in local areas where the sediments contained biogenic gas. Penetration achieved by the seismic signals was mostly 100 ms or more, and the records clearly show the entire Quaternary and upper part of the Tertiary sequence of deposits. Multiple overlapping channels and channel-fill deposits related to major fluctuations in sea level were observed. Several questions about the relations among the different generations of channels were resolved, and the channels were traced into the northern part of the bay. The cruise effectively completed the basic seismic reflection grid between the mouth of the bay and the Annapolis Bridge. | ||||||||
Comments | Project = Geology of Chesapeake Bay, Geology of Chesapeake Bay | ||||||||
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Organization |
384 Woods Hole Road
Quissett Campus
Woods Hole, MA02543-1598
(508) 548-8700
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Principal investigators | Stephen Colman | ||
Crew members |
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Affiliate principal | Jeff Halka - MGS |
Data category: | Seismics, Location-Elevation |
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Data type: | Boomer, Air Gun / Water Gun, Sparker, Sub Bottom Profiler, Navigation |
Name | Description |
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Cruise report | Chief Scientist's cruise report including personnel, purpose, equipment and equipment performance, brief cruise summary, and trackmap. |
Equipment | Usage description | Data types | Datasets |
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ORE GeoPulse | Boomer | (no data reported) | |
Benthos AQ-4 10-element hydrophone streamer | Air Gun / Water Gun, Boomer, Sparker | 3 | |
Datasonics SST 220 sub-bottom 3.5k | Sub Bottom Profiler | (no data reported) | |
Loran-C | Navigation | 4 |
Dataset name | Equipment | Description | Dataset contact |
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1987-027-FA-SE-001 | Benthos AQ-4 10-element hydrophone streamer | Collection of paper record displays of seismic data( GEOP) for lines | Nancy K. Soderberg |
1987-027-FA-SE-002 | Benthos AQ-4 10-element hydrophone streamer | microfilm of | Nancy K. Soderberg |
1987-027-FA-SE-003 | Benthos AQ-4 10-element hydrophone streamer | analog tape of seismic data | Nancy K. Soderberg |
1987-027-FA-LN-001 | Loran-C | Navigation trackline plot for field activity 87027 | Nancy K. Soderberg |
1987-027-FA-LN-001-01 | Loran-C | Trackline map with line numbers, dates and time. | Nancy K. Soderberg |
1987-027-FA-LN-002 | Loran-C | Floppy disk(s) containing NV-MEGAPULSE, NV-MEGAPULSE, NV-MEGAPULSE, NV-MEGAPULSE, NV-MEGAPULSE, NV-MEGAPULSE, NV-MEGAPULSE, NV-MEGAPULSE, NV-MEGAPULSE, NV-MEGAPULSE, | Nancy K. Soderberg |
1987-027-FA-LN-003 | Loran-C | Digital tape(s) of NV, | Nancy K. Soderberg |