East Antarctic Ice Sheet Evolution in the George V Basin from Seismic Data

The George V Basin in East Antarctica contains a record of late Quaternary ice sheet and ice shelf extent. The dataset reconstructs this history through analyses of Chirp sub-bottom profiles, multi-channel seismic data, and sediment cores, distinguishing four glacial facies and two sediment drift facies. Radiocarbon ages from sediment cores link the glacial advance producing one facies to the Last Glacial Maximum.

Use Cases

• Modeling past ice sheet grounding lines based on identified glacial facies.
• Reconstructing paleo-ice shelf extent based on the distinction between disturbed and undisturbed sediment drift deposits.
• Analyzing sensitivity of the Antarctic margin to sea-level rise using evidence from the last deglaciation.
• Correlating seismic stratigraphic units with core-derived radiocarbon ages for chronological frameworks.

Strengths

• Integrates multiple data sources: Chirp sub-bottom profiles, multi-channel seismic data, and sediment cores.
• Distinguishes specific glacial and sediment drift facies with defined water depth boundaries (e.g., <500 m, >775 m).
• Provides ground-truthing and radiocarbon age constraints linking facies to the Last Glacial Maximum.

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 the single study area in the George V Basin.

Provenance

Source

Australian Ocean Data Network

Collection Method

Analysis of Chirp sub-bottom profiles, multi-channel seismic data, and sediment cores.

Time Range

Late Quaternary, including the Last Glacial Maximum.

Freshness

Last updated 2026-04-10 17:02:43.238864; freshness should be verified.

Geography

George V Basin, East Antarctica.