Seismic Stratigraphy and Sediment Basins of East Antarctica

Seismic reflection data reveals two major sedimentary basins along the Wilkes Land and Terre Adelie margins containing over 5 seconds two-way travel time of sediments, interpreted as representing more than 9 kilometers in thickness. The Australian Ocean Data Network compiled this dataset, which identifies four seismic megasequences bounded by basement and key unconformities. It was last updated in April 2026.

Use Cases

• Analyze sediment thickness variations using the two-way travel time (TWT) metric to map basin geometry and depocenters like the Sabrina and Budd Coast Basins.
• Correlate seismic megasequences (MS4 to MS1) with interpreted unconformities of Turonian, Maastrichtian, and Middle Eocene age to reconstruct the tectonic and depositional history.
• Model sub-glacial sediment provenance by linking the Budd Coast Basin depocentre thickness to the Totten Glacier's sub-glacial basin using seismic correlation data.
• Interpret rift and post-rift sediment distribution patterns from the margin-parallel Sabrina Basin to the deep-ocean basin for basin analysis.

Strengths

• Identifies sedimentary basins with over 5 seconds TWT of sediments, interpreted as exceeding 9 kilometers in thickness.
• Defines four distinct seismic megasequences (MS4 to MS1) bounded by specific geological features.
• Provides seismic correlation with the Australian margin for age interpretation (Late Jurassic to mid-Cretaceous).

Limitations

• Specific row count, column names, and sample data are unavailable.
• Primary data format is HTML, which may not be directly usable for quantitative analysis without extraction.
• Geographic coverage is limited to the Wilkes Land and Terre Adelie margins of East Antarctica.

Provenance

Source

Australian Ocean Data Network

Collection Method

Seismic reflection data collection and interpretation.

Time Range

Geological ages from Late Jurassic to present, based on seismic correlation.

Freshness

Last updated in April 2026.

Geography

Wilkes Land and Terre Adelie margins, East Antarctica.