USAP-DC

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{"@context": "https://schema.org/", "@type": "Dataset", "@id": "doi:10.15784/601098", "additionalType": ["geolink:Dataset", "vivo:Dataset"], "name": "Ross Sea unconformities digital grids in depth and two-way time", "description": "This data set includes digital 1 km grids of sub-bottom \n\tstratigraphy of most of Ross Sea. In addition to acoustic basement (same as top\n\tsyn-rift sedimentary rocks in Central Trough and probably other basins), these\n\tgrids include Oligocene and Miocene horizons that are unconformities in most\n\tareas. A sea floor grid is also included. Except for the sea floor grid, the\n\tgrids are trimmed to be relatively close to control of interpreted seismic\n\tstratigraphy. The grids are provided in two way travel time and in depth. Math\n\tcan be performed on the corresponding time and depth grids to recreate the 3D\n\tinterval velocity model that was used. The velocity of the water used was 1450\n\tm/s. More detailed descriptions of the work are found in the Final NSF report\n\tfor PLR1341585 by C. Sorlien, B. Luyendyk, and D. Wilson. The grids are\n\tcontinuous so are merged with the sea floor where there is outcrop, or with\n\tbasement if there is onlap, or with a young unconformity where there is\n\tsub-bottom truncation. The filenames include the name of the horizon\n\t(unconformity) and whether they are in time or depth. \\\"etc.\\\" means there are\n\ttwo or more horizons that have been merged. Most of the horizons are named and\n\tdefined in the ANTOSTRAT (1995) atlas. The starting points for many of these\n\thorizons are ANTOSTRAT [1995] near DSDP sites 273, 272, and 270. In other areas\n\twe deviate from the interpretation of ANTOSTRAT [1995]. late Oligocene through\n\tmiddle Miocene horizons, interpreted very close to the ANTOSTRAT [1995] at DSDP\n\tSite 273 in Central Trough, are much deeper in our interpretation within Terror\n\tRift. These horizon grids usually include the sea floor where there is outcrop\n\tor acoustic basement (top syn-rift in some basins) where there is onlap. \n\n\n\tANTOSTRAT (1995), Seismic Stratigraphic Atlas of the Ross Sea, in Geology and\n\tSeismic Stratigraphy of the Antarctic Margin, edited by A. K. Cooper, Barker,\n\tP. F., Brancolini, G., 22 plates, American Geophysical Union, Washington,\n\tD.C.", "citation": "Sorlien, C., & Wilson, D. S. 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Ross Sea unconformities digital grids in depth and two-way time Data DOI: https://doi.org/10.15784/601098 Cite as Sorlien, C., & Wilson, D. S. (2019) "Ross Sea unconformities digital grids in depth and two-way time" U.S. Antarctic Program (USAP) Data Center. doi: https://doi.org/10.15784/601098. AMD - DIF Record(s) USAP-1341585_1 Abstract This data set includes digital 1 km grids of sub-bottom stratigraphy of most of Ross Sea. In addition to acoustic basement (same as top syn-rift sedimentary rocks in Central Trough and probably other basins), these grids include Oligocene and Miocene horizons that are unconformities in most areas. A sea floor grid is also included. Except for the sea floor grid, the grids are trimmed to be relatively close to control of interpreted seismic stratigraphy. The grids are provided in two way travel time and in depth. Math can be performed on the corresponding time and depth grids to recreate the 3D interval velocity model that was used. The velocity of the water used was 1450 m/s. More detailed descriptions of the work are found in the Final NSF report for PLR1341585 by C. Sorlien, B. Luyendyk, and D. Wilson. The grids are continuous so are merged with the sea floor where there is outcrop, or with basement if there is onlap, or with a young unconformity where there is sub-bottom truncation. The filenames include the name of the horizon (unconformity) and whether they are in time or depth. \"etc.\" means there are two or more horizons that have been merged. Most of the horizons are named and defined in the ANTOSTRAT (1995) atlas. The starting points for many of these horizons are ANTOSTRAT [1995] near DSDP sites 273, 272, and 270. In other areas we deviate from the interpretation of ANTOSTRAT [1995]. late Oligocene through middle Miocene horizons, interpreted very close to the ANTOSTRAT [1995] at DSDP Site 273 in Central Trough, are much deeper in our interpretation within Terror Rift. These horizon grids usually include the sea floor where there is outcrop or acoustic basement (top syn-rift in some basins) where there is onlap. ANTOSTRAT (1995), Seismic Stratigraphic Atlas of the Ross Sea, in Geology and Seismic Stratigraphy of the Antarctic Margin, edited by A. K. Cooper, Barker, P. F., Brancolini, G., 22 plates, American Geophysical Union, Washington, D.C. Creator(s): Sorlien, Christopher; with contributions from several others, Date Created: 2018-05-25 Repository: USAP-DC (current) License: Creative Commons Attribution-NonCommercial v4.0 Generic [CC BY-NC 4.0] Spatial Extent(s) West: 165.6, East: -171.7, South: -78.67, North: -73.22 Temporal Extent(s) Start: 2014-01-01 - End: 2017-12-31 Award(s) NSF 1341585 Version: 1 Related Project(s) Subsidence, Tilting, Sedimentation, and Oligocene-middle Miocene paleo-depth of Ross Sea References Sorlien, C. C., C. Sauli, L. De Santis, B. P. Luyendyk, N. Wardell, S. M. Davis, D. S. Wilson, S. Brazell, L. Bartek, P. J. Bart, 2016, Seismic stratigraphic interpretations suggest that sectors of the central and western Ross Sea were near and above sea level during earliest Oligocene time, Abstract C52B-08 presented at 2016 Fall Meeting, AGU, San Francisco, Calif., 11-16 Dec. Keywords Antarctica Continental Margin Cryosphere Geology/Geophysics - Other Marine Geoscience Miocene Oligocene Seismic Reflection Seismic Reflection