Samples dredged during BMR Survey 66 by KV Rig Seismic in the central Great Australian Bight Basin are examined and their calcareous nannofossils are recorded. The dataset compares Maastrichtian, Eocene, and Oligocene assemblages with onshore southern Australian sequences, providing evidence for marine ingressions and subsidence patterns. The data is provided by the Australian Ocean Data Network and was last updated in 2026.
Use Cases
- Reconstructing marine ingression phases in the Maastrichtian based on nannofossil assemblages.
- Comparing offshore and onshore Eocene transgression sequences to understand regional geological offsets.
- Investigating paleoclimate and surface water temperature gradients during the Eocene and Oligocene based on nannofossil evidence.
- Analyzing seafloor subsidence rates since the Late Cretaceous using nannofossil, palynological, and lithological data.
- Studying the impact of a proto-Leeuwin Current on southern Australian waters during the middle Eocene.
Strengths
- The description provides detailed geological interpretations, including evidence for three discernible phases of Maastrichtian marine ingression.
- The dataset compares offshore and onshore records, offering a regional perspective on geological events.
- The data integrates nannofossil evidence with palynological and lithological data to support conclusions about subsidence.
Limitations
- Column-level documentation is absent; field semantics must be inferred after download.
- Row count is unknown, which may limit suitability assessment.
- The data is stored in PDF and HTML formats, which may require extraction for quantitative analysis.
Provenance
- Source
- Australian Ocean Data Network
- Collection Method
- Samples dredged during BMR Survey 66 by KV Rig Seismic.
- Time Range
- Maastrichtian to Oligocene periods.
- Freshness
- Last updated 2026-05-05 00:26:56.012519; freshness should be verified.
- Geography
- Central Great Australian Bight Basin and onshore southern Australian margin.