Australian Tertiary Marine Bed Age Revisions from Geoscience Australia

Geoscience Australia data details significant revisions in the age classification of marine Tertiary deposits in Australia. The description notes the recognition of Eocene deposits over a wide area in south-eastern Australia, supported by detailed mapping and the discovery of the foraminiferal genus Hantkenina. At least 4,000 feet of Middle Eocene beds have been proven in bores, and the dataset discusses reclassifications from Oligocene/Miocene to Eocene and from Oligocene to Miocene.

Use Cases

• Reconstructing regional geological timelines based on described age revisions of specific beds.
• Analyzing the distribution of Eocene foraminifera (e.g., Hantkenina) mentioned in the description.
• Correlating stratigraphic stages (e.g., Janjukian, Anglesean) with updated age classifications.
• Studying the presence and extent of marine Oligocene deposits in Australia as discussed.

Strengths

• Based on detailed mapping and microfaunal investigation as described.
• Includes specific geological measurements, such as 'at least 4,000 feet' of proven Middle Eocene beds.
• Covers a defined geographical area in south-eastern and western Victoria, Australia.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.
• Data is presented as HTML/PDF text, which may require extraction for computational analysis.

Provenance

Source

Geoscience Australia Data

Collection Method

Detailed mapping and investigation of sediments for microfaunas.

Time Range

Tertiary period (focus on Eocene, Oligocene, Miocene, Pliocene).

Freshness

Last updated 2026-03 15:25:02.170858; freshness should be verified.

Geography

Australia, specifically south-eastern Australia, south-western Victoria, Torquay, Anglesea, Adelaide Basin.