Seismic Stratigraphy of East Antarctic Margins, Sediment Thickness to 9 km

East Antarctic continental margins of Wilkes Land and Terre Adelie contain two major sedimentary basins with over 5 seconds two-way travel time of sediments. Seismic reflection data identified four megasequences bounded by basement, unconformities, and the seafloor. The data, from Geoscience Australia, shows rift and post-rift sediments concentrated in the Sabrina and Budd Coast Basins.

Use Cases

• Modeling sedimentary basin evolution based on identified seismic megasequences.
• Analyzing rift and post-rift sediment distribution patterns described for the Sabrina and Budd Coast Basins.
• Correlating geological strata with the Australian margin based on the described seismic interpretations.
• Studying sub-glacial sediment provenance linked to the Totten Glacier as suggested by the Budd Coast Basin location.

Strengths

• Identifies sediment thickness exceeding 5 seconds two-way travel time, corresponding to over 9 km.
• Delineates two major sedimentary basins and four distinct seismic megasequences.
• Provides interpreted ages for basin formation and unconformities, including Late Jurassic to mid-Cretaceous for the Sabrina Basin.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.
• Data may reflect geographic bias inherent to data_gov_au, focusing on specific Antarctic margins.

Provenance

Source

Geoscience Australia Data

Collection Method

Seismic reflection survey

Freshness

Last updated 2026-04-30 14:21:46.532681; freshness should be verified.

Geography

Wilkes Land and Terre Adelie margins, East Antarctica