Australian Marine Tertiary Bed Age Revisions from Geological Investigations

The Australian Ocean Data Network hosts a document detailing 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 microfauna investigations, including the discovery of the foraminiferal genus Hantkenina. It discusses changes in the classification of stages like Janjukian and Anglesean, and mentions at least 4,000 feet of Middle Eocene beds proven in bores.

Use Cases

• Reconstructing regional geological timelines based on described age revisions of Tertiary beds.
• Studying the distribution of Eocene microfaunas, such as Hantkenina, mentioned in the description.
• Analyzing changes in stratigraphic classification for stages like Janjukian and Anglesean.
• Correlating marine and non-marine deposit ages in the Australian Tertiary period.

Strengths

• Description references specific geological evidence, including the discovery of the key fossil Hantkenina.
• Mentions a quantified vertical extent of 'at least 4,000 feet' for Middle Eocene beds proven in bores.
• Provides a focused discussion on age reclassifications for specific Australian locations and stages.

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 mapping and microfaunal investigations as described.

Time Range

Tertiary period (Paleocene to Pliocene), with a focus on Eocene revisions.

Freshness

Last updated 2026-06-05 05:52:36.500962; freshness should be verified.

Geography

Australia, specifically south-eastern Australia, Victoria, South Australia (Adelaide Basin).