World Data Service for Geophysics
Total Sediment Thickness of the World's Oceans and Marginal Seas, Version 2
How to Cite These Data:
Whittaker, Joanne, Alexey Goncharov, Simon Williams, R. Dietmar Müller, German Leitchenkov (2013)
Global sediment thickness dataset updated for the Australian-Antarctic Southern Ocean, Geochemistry,
Geophysics, Geosystems. DOI: 10.1002/ggge.20181
NGDC's global ocean sediment thickness grid (Divins, 2003) has been updated for the Australian-Antarctic region
(60°-155°E, 30°-70°S). New seismic reflection and refraction data have been used to add
detail to the conjugate Australian and Antarctic margins and intervening ocean floor where previously regional
sediment thickness patterns were poorly known.
On the margins, sediment thickness estimates were computed from
velocity-depth functions from sonobuoy/refraction velocity solutions ground-truthed against seismic reflection
data. For the Southeast Indian Ridge abyssal plain, sediment thickness contours from Géli et al. (2007) were
The new regional sediment thickness grid was combined with NGDC's original ocean sediment thickness grid
(Divins, 2003) to create an updated global grid of ocean sediment thickness.
Even using the minimum estimates, sediment accumulations on
the extended Australian and Antarctic continental margins are 2 km thicker across large regions and up to 9 km
thicker in the Ceduna Basin compared to NGDC's original sediment thickness grid (Divins, 2003), which has been deprecated but is still available.
Divins, D.L., Total Sediment Thickness of the World's Oceans & Marginal Seas, NOAA National Geophysical Data Center, Boulder, CO, 2003.
Géli, L., Cochran, J., Lee, T., Francheteau, J., Labails, C., Fouchet, C., and Christie, D., 2007,
Thermal regime of the Southeast Indian Ridge between 88°E and 140°E: Remarks on the subsidence of
the ridge flanks: J. Geophys. Res., v. 112, no. B10, p. B10101.