Antarctic Ice Shelf Grounding Zone Features from Seismic and Sidescan Images

Western Prydz Bay, Antarctica, features several grounding zone wedges and sea floor bedforms left by the Lambert Glacier during the last glacial cycle. The dataset includes seismic profiles and sidescan sonographs from the Australian Ocean Data Network, last updated in April 2026. Data indicates vertical accretion at the glacier bed was the primary depositional process, and reveals flutes and dune fields formed by sub-ice-shelf circulation.

Use Cases

• Modeling subglacial sediment accretion processes based on seismic profile interpretations.
• Analyzing deformable bed conditions beneath ice shelves based on the presence of flutes.
• Studying meltwater-driven circulation patterns beneath ice shelves based on dune field orientation.
• Investigating the formation of composite glacial ridges like the one surrounding Lambert Deep.

Strengths

• Data includes multiple complementary geophysical survey types: seismic profiles and sidescan sonographs.
• Focuses on a specific, scientifically critical region: the grounding zone of a major Antarctic glacier.
• Description provides specific geological interpretations, such as the dominance of vertical accretion over progradation.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count and file size are unknown, which may limit suitability assessment.
• Data may reflect geographic bias inherent to data_gov_au, focusing solely on western Prydz Bay.

Provenance

Source

Australian Ocean Data Network

Collection Method

Collected via seismic profiling and sidescan sonar surveys.

Time Range

Covers features from the last glacial cycle.

Freshness

Last updated 2026-04-16 10:17:14.205198; freshness should be verified.

Geography

Western Prydz Bay and Prydz Channel, Antarctica.