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)
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)
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)
Version:
1
Related Project(s)
References
Keywords
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This dataset has been downloaded 14 times since March 2017 (based on unique date-IP combinations)