USGS - science for a changing world

USGS Coastal and Marine Geology Program

Field Activity Details for field activity 2015-001-FA

Other ID: none

Status: Completed

Organization(s): USGS, Woods Hole Coastal and Marine Science Center

Funding Program(s): Other (Other)

Principal Investigator(s): Laura Brothers, E. Robert Thieler

Affiliate Investigator(s):

Information Specialist(s): Elizabeth Pendleton

Data Type(s): Imagery: Photo, Imagery: Video, Location-Elevation: Navigation, Sampling: Geology, Seismics: Boomer, Seismics: Multichannel, Seismics: Sub Bottom Profiler, Sonar: Interferometric, Sonar: Sidescan, Sonar: Sound Velocity

Scientific Purpose/Goals: map inner shelf bathymetry, surficial sediment type, geologic framework

Vehicle(s):

Start Port/Location: Ocean City, MD

End Port/Location: Norfolk, VA

Start Date: 2015-06-08

End Date: 2015-07-17

Equipment Used: SEA SWATHplus-M 234 kHz, Sensor - MVP30 (Odim), GeoEel 16-channel hydrophone, Other, Edgetech 4200 sidescan, Real Time Kinematic GPS, GoPro camera, Van Veen grab sampler, S-Boom seismic source

Information to be Derived: Sea floor map;Bathymetric maps; sub subsurface data

Summary of Activity and Data Gathered: Collected 5,516 km of geophysical tracklines. 125 grab samples

Staff: Seth Ackerman, Brian Andrews, Wayne Baldwin, Emile Bergeron, Laura Brothers, William Danforth, David Foster, Eric Moore, Alexander Nichols, Charles Worley, Other

Affiliate Staff:

Notes: Other instrumentation: Edgetech 512i

Other Staffing: Jackson Curie from the PCMSC also participated in the field activity.
Inner shelf Delmarva peninsula, Cape Henlopen, DE to Fisherman Island, VA

Location:

Mid-Atlantic Bight, Delaware/Maryland/Virginia, United States, North America, North Atlantic

Boundaries
North: 38.80547 South: 36.85325 West: -76.1352 East: -74.82788

Platform(s):

photo of Scarlett Isabella
Scarlett Isabella

Publications

Ellis, A.M., Shaw, J.E., Osterman, L.E., Smith, C.G.,, 2018, The Foraminifera of Chincoteague Bay, Assateague Island, and the Surrounding Areas: a Regional Distribution Study: Journal of Foraminiferal Research, v. 48 no. 3, pp. 223–240, doi: 10.2113/gsjfr.48.3.223.

Ellis, A.M., Wheaton, C.J., Smith, C.G., 2017, Archive of sediment physical properties and grain-size data for sediment samples collected offshore of Assateague Island, Maryland and Virginia: U.S. Geological Survey data release, https://doi.org/10.5066/F7HX19WB.

Brothers, L.L., Foster, D.S., Pendleton, E.A., and Thieler, E.R., Distribution and Tentative Ages of an Extensive Paleochannel Network Offshore of the Delmarva Peninsula. [abs.]: , GSA 2015 Fall Annual Meeting. Baltimore, MD, November 1-4, 2015.

Pendleton, E.A., Brothers, L.L., Sweeney, E.S., Thieler, E.R., and Foster, D.S., 2017, Sediment texture and geomorphology of the sea floor from Fenwick Island, Maryland to Fisherman's Island, Virginia: U.S. Geological Survey data release, https://doi.org/10.5066/F78K779J.

Pendleton, E.A., Sweeney, E.M., and Brothers, L.L., 2019, Optimizing an inner-continental shelf geologic framework investigation through data repurposing and machine learning: Geosciences, v. 9, issue 6, https://doi.org/10.3390/geosciences9050231.

Sweeney, E.M., Pendleton, E.A., Ackerman, S.D., Andrews, B.D., Baldwin, W.E., Danforth, W.W., Foster, D.S., Thieler, E.R., and Brothers, L.L., 2015, High-resolution geophysical data collected along the Delmarva Peninsula 2015, U.S. Geological Survey Field Activity 2015-001-FA (ver. 3.0, May 2016): U.S. Geological Survey data release, https://doi.org/10.5066/F7P55KK3.

Wehmiller, J.F., Brothers, L.L., Ramsey, K.W., Foster, D.S., Mattheus, C.R., Hein, C.J., Shawler, J.L., 2021, Molluscan aminostratigraphy of the US Mid-Atlantic Quaternary coastal system: Implications for onshore-offshore correlation, paleochannel and barrier island evolution, and local late Quaternary sea-level history: Quaternary Geochronology doi:10.1016/j.quageo.2021.101177.

Portals/Viewers

FAN 2015-001-FA has data viewable in the CMGP Video and Photograph Portal. View the data in this application here. See the instructions for working with this application.

Data Acquired

Survey EquipmentSurvey InfoData Type(s)Data Collected
SEA SWATHplus-M 234 kHzThese swath interferometric bathymetry data were collected to identify sea-floor morphology.Interferometric
2015-001-FA_bathy (Bathymetric data from swath interferometric bathymetry data. Bathymetric data are useful geophysical datasets for geologic framework studies. These data can be used in conjunction with other geophysical and sample data to identify sea-floor morphology.)
Sensor - MVP30 (Odim)These data were deployed to correct sound velocity artifacts in bathymetery dataSound Velocity
2015-001-FA_MVP-SVP_data (Location of sound velocity profiles along with profile plots collected in 2015 by the U.S. Geological Survey along the Delmarva Peninsula, MD, and VA)
GeoEel 16-channel hydrophoneThese seismic reflection profile data were collected to image the sediment layers beneath the seafloor.Multichannel
2015-001-FA_MCS (multi-channel streamer seismic-reflection profiles collected in 2015 by the U.S. Geological Survey along the Delmarva Peninsula, MD, and VA.)
Other --- --- ---
Edgetech 4200 sidescanSidescan sonar data were collected with an Edgetech 4200 dual frequency (100/410 kHz) frequency modulated sidescan-sonar towfish on the M/V Scarlet Isablella. The sonar was towed from the stern A-frame of the vessel. A 3PS digital block cable counter was used to measure the amount of tow cable deployed, and cable out values were transmitted via serial connection to the Edgetech Discover (version 34.0.1.106) acquisition software (lines L40F1 to L47F1) and SonarWiz software (version 6.01.0009) (lines L47F3 to L183-20150714_134804) on the sonar acquisition computer for layback calculation. Tracklines are generally spaced 200m apart.Sidescan
2015-001-FA_sss (sidescan-sonar data collected by the U.S. Geological Survey along the Delmarva Peninsula, MD, and VA in 2015)
Real Time Kinematic GPSNavigation data were collected to provide spatial navigation for bathymetric data collection and to spatially correlate the bathymetric data with other data in the GIS.Navigation
2015-001-FA_HYPACK (Text files of the navigation logged with HYPACK Software during survey 2015-001-FA conducted along the Delmarva Peninsula, MD, and VA by the U.S. Geological Survey in 2015.)
GoPro cameraBottom photographs and sediment samples were acquired to validate the seafloor interpretations made from geophysical data. Often sediment samplers are unable to recover large-diameter particles, so photographs can document the seafloor character in areas where samples may not be obtained. Two GoPro cameras were mounted to a USGS SEABOSS (Mark II configuration) with a modified VanVeen sampler frame. Approximate SEABOSS dimensions are 115 X 115 X 117 cm. The Van Veen sampler is housed at the bottom and center of the frame at approximately 30 X 32 X 16 cm with a 1/10 sq. meter sample capacity. Two red lasers were mounted on the frame above the sampler, 20 cm apart for scale in bottom photographs. A Keldan (Advanced Lighting Technology) light was mounted at the top of the frame and aimed downward to illuminate the seabed for photographs. Two GoPro cameras were mounted on the frame and set to capture photographs at 2 or 5 second intervals. The GoPro Hero 2 was mounted approximately 70 cm from the bottom of the SEABOSS frame and captured photographs at 2-second interval. The GoPro Hero 3+ was mounted approximately 20 cm from the bottom of the SEABOSS frame and captured video and photographs at 5-second interval. Because the frame was stationary on the bottom of the seabed only one photograph for each camera was chosen to represent the seafloor at each station location. Photographs collected in the water column, on the ship's deck, and duplicate photos of the seafloor were deleted. The Hero 2 field of view includes the Hero 3 GoPro (furthest to the right) and 2 instruments that were attached to the SEABOSS for additional data. The instrument to the left is a Suunto SK-7 dive compass, which shows the orientation of the SEABOSS. The digital readout to the right of the dive compass is the Uwatec dive timer, which shows 4 readouts: upper left is depth in meters, lower left is max depth in meters, upper right is dive time in minutes and lower right is temperature in Celsius (during ascent, this changes to ascent rate in meters per minute and shows an arrow when it senses the rate is too fast).Photo
Video
2015-001-FA_Photos (Location of bottom photographs along with images collected by the U.S. Geological Survey in 2015 along the Delmarva Peninsula, MD, and VA)
Van Veen grab samplerBottom photographs and sediment samples were acquired to validate the seafloor interpretations made from geophysical data. Often sediment samplers are unable to recover large-diameter particles, so photographs can document the seafloor character in areas where samples may not be obtained. Two GoPro cameras were mounted to a USGS SEABOSS (Mark II configuration) with a modified VanVeen sampler frame. Approximate SEABOSS dimensions are 115 X 115 X 117 cm. The Van Veen sampler is housed at the bottom and center of the frame at approximately 30 X 32 X 16 cm with a 1/10 sq. meter sample capacity. Two red lasers were mounted on the frame above the sampler, 20 cm apart for scale in bottom photographs. A Keldan (Advanced Lighting Technology) light was mounted at the top of the frame and aimed downward to illuminate the seabed for photographs. Two GoPro cameras were mounted on the frame and set to capture photographs at 2 or 5 second intervals. Samples were recovered when the frame was lifted off the seabed and triggered the Van Veen sampler to close.2015-001-FA_Samples (Location and analyses of sediment samples collected by the U.S. Geological Survey in 2015 along the Delmarva Peninsula, MD, and VA)
S-Boom seismic sourceMCS seismic data were collected using S-Boom source and a 100-m long GeoEel 16-channel streamer. The applied acoustics S-Boom source was towed astern of the M/V Scarlet Isabella at a power level of 400 joules. The Geometrics GeoEel, 16-channel liquid filled digital streamer was towed from the starboard side of the vessel, and the center of the first channel of the active section was 10 to 20 meters aft of the boomer source. The streamer had a group interval of 3.25 meters connected to Geometrics Streamer Power Supply Unit (SPSU). Data were acquired in Geometrics SEG-D format on Windows PC controller system using Geometrics CNT-1 software. The fire rate was 1 s, the record length was 250 ms and the sample interval was 0.25 ms.Boomer
No data was collected

Accessibility FOIA Privacy Policies and Notices

U.S. Department of the Interior | U.S. Geological Survey
Questions or Comments? Contact CMGDS Team
https://cmgds.marine.usgs.gov