Recent years have seen drastic changes in the age classification of marine Tertiary deposits in Australia. Detailed mapping and microfauna investigation in south-eastern Australia led to the recognition of Eocene deposits, including the discovery of the foraminiferal genus Hantkenina. The dataset, sourced from the Australian Ocean Data Network, documents these revisions, including the reclassification of the Janjukian Stage and Anglesean Stage.
Use Cases
- Reconstructing regional geological timelines based on described stratigraphic revisions.
- Studying the distribution of Eocene microfaunas, specifically Hantkenina, in southeastern Australia.
- Comparing age classifications for specific formations like the Janjukian Stage and Anglesean Stage.
- Investigating the presence and extent of Oligocene deposits in Australia as discussed in the description.
Strengths
- Describes a significant revision in geological understanding based on detailed mapping and fossil evidence.
- Provides specific examples of reclassified stages and formations, such as the Janjukian Stage at Bird Rock and the Anglesean Stage at Anglesea.
- Notes the discovery of the key fossil genus Hantkenina at multiple localities.
Limitations
- Description metadata is limited; actual data quality requires manual inspection after download.
- Column-level documentation is absent; field semantics must be inferred after download.
- Row count is unknown, which may limit suitability assessment.
Provenance
- Source
- Australian Ocean Data Network
- Collection Method
- Likely compiled from geological research and publications.
- Time Range
- Focuses on Tertiary period (Paleocene to Pliocene) age classifications.
- Freshness
- Last updated 2026-05-05 04:59:07.516924; freshness should be verified.
- Geography
- Primarily southeastern Australia, specifically Victoria and South Australia.