Late Cretaceous to early Tertiary calcareous nannofossil data from samples dredged in the Great Australian Bight Basin during BMR Survey 66. The study, likely published by the Australian Ocean Data Network, compares offshore and onshore assemblages to interpret the geological history of Australia's southern margin. It provides evidence for marine ingressions, sea-level changes, and the influence of a proto-Leeuwin Current during the Eocene and Oligocene.
Use Cases
- Reconstructing paleoenvironmental conditions based on nannofossil assemblage comparisons described in the study.
- Analyzing the timing and phases of marine ingressions during the Maastrichtian and Eocene as detailed in the description.
- Investigating sea-level change and basin subsidence history using the nannofossil evidence for a latest Eocene sea-level fall.
- Studying paleoceanographic currents by examining the evidence for a warm, intermittent proto-Leeuwin Current in the middle Eocene.
Strengths
- Data provides the first reported Maastrichtian nannofossil assemblages found in southern Australia.
- Study integrates multiple data types, with nannofossil evidence supported by palynological and lithological data.
- Analysis covers a long temporal range from the Late Cretaceous (Maastrichtian) through the Eocene and Oligocene.
Limitations
- Column-level documentation is absent; field semantics must be inferred after download.
- Row count is unknown, which may limit suitability assessment.
- Data files are in HTML and PDF formats, which may require extraction for computational analysis.
Provenance
- Source
- Australian Ocean Data Network
- Collection Method
- Samples dredged during BMR Survey 66 by KV, Rig Seismic, with subsequent laboratory analysis of calcareous nannofossils.
- Time Range
- Maastrichtian (Late Cretaceous) to Oligocene (early Tertiary)
- Freshness
- Last updated 2026-06-23 00:19:10.770873; freshness should be verified.
- Geography
- Great Australian Bight Basin and onshore southern Australian margin (including Otway Basin)