Baldwin, Wayne, 2016, Elevation of the late Wisconsinan to early Holocene regressive unconformity (Ur) beneath Vineyard and western Nantucket Sounds, Massachusetts (Esri binary grid; UTM, Zone 19N, WGS 84): Open-File Report 2016-1119, U.S. Geological Survey, Coastal and Marine Geology Program, Woods Hole Coastal and Marine Science Center, Woods Hole, MA.This is part of the following larger work.Online Links:
Baldwin, Wayne E. , Foster, David S. , Pendleton, Elizabeth A. , Barnhardt, Walter A. , Schwab, William C. , Andrews, Brian D. , and Ackerman, Seth D. , 2016, Shallow Geology, Sea-Floor Texture, and Physiographic Zones of Vineyard and western Nantucket Sounds, Massachusetts: Open-File Report 2016-1119, U.S. Geological Survey, Reston, VA.Online Links:
This is a Raster data set. It contains the following raster data types:
Planar coordinates are encoded using row and column
Abscissae (x-coordinates) are specified to the nearest 40.000000
Ordinates (y-coordinates) are specified to the nearest 40.000000
Planar coordinates are specified in meters
The horizontal datum used is D_WGS_1984.
The ellipsoid used is WGS_1984.
The semi-major axis of the ellipsoid used is 6378137.000000.
The flattening of the ellipsoid used is 1/298.257224.
508-548-8700 x2226 (voice)
508-457-2310 (FAX)
wbaldwin@usgs.gov
This data set contains a grid representing the depth to the late Wisconsinan to early Holocene regressive unconformity (Ur) beneath Vineyard and western Nantucket Sounds. These data are useful for assessing relations between geologic framework and sea-bed morphology. The late Wisconsinan regressive unconformity (Ur) locally merges with Holocene transgressive unconformity (Ut) and defines the upper surface of glacial deposits.
Pendleton, E.A., Twichell, D.C., Foster, D.S., Worley, C.R, Irwin, B.J., and Danforth, W.W., 2012, High-resolution geophysical data from the sea floor surrounding the Western Elizabeth Islands, Massachusetts: Open-File Report 2011-1184, U.S. Geological Survey, Reston, VA.Online Links:
Andrews, B.D., Ackerman, S.D., Baldwin, W.E., Foster, D.S., and Schwab, W.C., 2014, High-Resolution Geophysical Data from the Inner Continental Shelf: Vineyard Sound, Massachusetts: Open-File Report 2012-1006, U.S. Geological Survey, Reston, VA.Online Links:
Pendleton, E.A., Andrews, B.D., Danforth, W.W., and Foster, D.S., 2014, High-resolution geophysical data collected aboard the U.S. Geological Survey research vessel Rafael to supplement existing datasets from Buzzards Bay and Vineyard Sound, Massachusetts: Open-File Report 2013-1020, U.S. Geological Survey, Reston, VA.Online Links:
Person who carried out this activity:
508-548-8700 x2226 (voice)
508-457-2310 (FAX)
wbaldwin@usgs.gov
Person who carried out this activity:
508-548-8700 x2226 (voice)
508-457-2310 (FAX)
wbaldwin@usgs.gov
O'Hara, Charles J. , and Oldale, Robert N. , 1980, Maps showing geology and shallow structure of eastern Rhode Island Sound and Vineyard Sound, Massachusetts: U.S. Geological Survey Miscellaneous Field Studies Map MF-1186, U.S. Geological Survey, Reston, VA.Online Links:
O'Hara, Charles J. , and Oldale, Robert N. , 1987, Maps showing geology, shallow structure, and bedforms of Nantucket Sound, Massachusetts: U.S. Geological Survey Miscellaneous Field Studies Map MF-1911, U.S. Geological Survey, Reston, VA.Online Links:
Navigational accuracy of the seismic-reflection data used for this interpretation was assumed to be ± 10 to 20 meters. Refer to seismic trackline metadata in Pendleton and others (2012; 2014), and Andrews and others (2014) for specific seismic data acquisition parameters and accuracy reports. Additional navigational uncertainty in this interpretation arises from subjective digitizing of the seismic reflectors, sampling of the interpreted horizons at 20-m along track intervals prior to export from the seismic interpretation package.
The nominal resolution of the chirp seismic-reflection systems is 0.5 meter. Additional uncertainty is introduced by digitizing during interpretation, and converting the measured thicknesses from two-way travel times to meters using a constant velocity of sound in sediment of 1500 m/s. The vertical accuracy also depends on the accuracy of the composite bathymetric grid. This structural surface was computed by subtracting the isopach of Holocene fluvial, estuarine (Qfe), nearshore marine (Qmn), and deepwater marine (Qmd) sediments (vnspgisop) from the composite bathymetric surface (vns10m_navd88) referenced to NAVD 88.
All chirp and boomer seismic-reflection data collected within the study area during USGS Woods Hole Coastal and Marine Science Center field activities 2009-002-FA, 2010-003-FA, 2010-004-FA, 2010-047-FA, 2010-100-FA, 2011-004-FA, and 2011-013-FA were used to interpret the subsurface geologic units. The grid contains three internal no data zones where it was not possible to make continuous interpretations regarding the thicknesses of subsurface units. No seismic data were collected within the no data area coincident with Middle Ground Shoal, thus precluding interpretation. The Knudsen Engineering Limited (KEL) Chirp 3202 data collected across the shallowest portions of L'Hommedieu and Hedge Fence Shoals provided inadequate combinations of resolution and penetration to support confident interpretation, due to shallow water depths and difficult to penetrate sandy, gravelly substrate.
Chirp seismic-reflection data collected during USGS Woods Hole Coastal and Marine Science Center field activities 2009-002-FA, 2010-003-FA, 2010-004-FA, 2011-004-FA, and 2011-013-FA and boomer seismic-reflection data during USGS Woods Hole Coastal and Marine Science Center field activities 2010-047-FA and 2010-100-FA were used to interpret the geologic framework of Vineyard and western Nantucket Sounds.
Are there legal restrictions on access or use of the data?
- Access_Constraints: None
- Use_Constraints:
- Public domain data from the U.S. Government are freely redistributable with proper metadata and source attribution. Please recognize the U.S. Geological Survey (USGS) as the source of this information.
508-548-8700 x2226 (voice)
508-457-2310 (FAX)
wbaldwin@usgs.gov
vnsurnavd88.zip from USGS Open-File report 2016-1119. WinZip file v. 14.5 contains an Esri Grid (and associated metadata) representing the depth to the late Wisconsinan to early Holocene regressive unconformity (Ur) beneath Vineyard and western Nantucket Sounds, Massachusetts.
Neither the U.S. Government, the Department of the Interior, nor the USGS, nor any of their employees, contractors, or subcontractors, make any warranty, express or implied, nor assume any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, nor represent that its use would not infringe on privately owned rights. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the U.S. Geological Survey in the use of these data or related materials. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government
| Data format: | WinZip file v. 14.5 contains an Esri Grid (and associated metadata) representing the depth to the late Wisconsinan to early Holocene regressive unconformity (Ur) beneath Vineyard and western Nantucket Sounds, Massachusetts. in format AIG (version ArcMap 9.3.1) Esri grid Size: 0.996 |
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| Network links: |
<https://pubs.usgs.gov/of/2016/1119/GIS_catalog/Stratigraphy/vnsurnavd88/vnsurnavd88.zip> <https://pubs.usgs.gov/of/2016/1119/ofr2016-1119-data_catalog.html> |
The grid contained in the zip file is available as an Esri binary grid. To utilize this data, the user must have a GIS software package capable of reading an Esri binary grid.
508-548-8700 x2226 (voice)
508-457-2310 (FAX)
wbaldwin@usgs.gov
