Two sediment cores collected from beneath the Amery Ice Shelf in East Antarctica describe physical sedimentation patterns. The cores, AM01b and AM02, comprise Holocene siliceous muddy ooze and provide indicators like lithology, 14C surface ages, absolute diatom abundance, and diatom assemblages. This dataset was published by the Australian Ocean Data Network and was last updated on June 23, 2026.
Use Cases
- Modeling sub-ice shelf sediment transport pathways based on lithology and diatom assemblage indicators.
- Contrasting basal melt and freeze processes using sediment cores from sites with different basal conditions.
- Reconstructing Holocene paleoenvironmental conditions beneath the Amery Ice Shelf using 14C ages and sediment composition.
- Investigating the influence of baroclinic versus barotropic circulation on sediment distribution beneath ice shelves.
Strengths
- Provides data from two distinct sites: one from a basal freezing zone and one from a basal melting zone.
- Includes multiple proxy indicators: lithology, 14C surface ages, absolute diatom abundance, and diatom assemblages.
- Offers corrected 14C ages for comparison with previous dating in Prydz Bay.
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 solely on the Amery Ice Shelf region.
Provenance
- Source
- Australian Ocean Data Network
- Collection Method
- Sediment core collection and laboratory analysis.
- Time Range
- Holocene, with a basal 14C age of 28250 ± 230 yr BP reported for core AM01b.
- Freshness
- Last updated 2026-06-23 03:31:56.203551; freshness should be verified.
- Geography
- Beneath the Amery Ice Shelf, East Antarctica.