Australian Tertiary Marine Bed Age Revisions and Stratigraphic Data

Australian marine Tertiary deposits have undergone significant age reassessments based on detailed mapping and microfaunal analysis. The dataset, sourced from the Australian Ocean Data Network, documents the recognition of Eocene deposits across southeastern Australia, including the discovery of the Hantkenina foraminiferal genus. It includes information on revised stage classifications, such as the Janjukian and Anglesean Stages, and discusses the thickness and probable extent of Middle Eocene to Paleocene beds.

Use Cases

• Re-evaluating regional stratigraphic correlations based on described microfaunal evidence like Hantkenina.
• Studying the temporal distribution of Tertiary marine deposits in southeastern Australia.
• Analyzing changes in scientific consensus on the age of specific geological stages mentioned, such as the Janjukian and Anglesean.
• Investigating the presence and boundaries of Eocene, Oligocene, and Miocene deposits in Victoria and South Australia.

Strengths

• Documents a specific, detailed scientific revision of Tertiary age classifications.
• References concrete geological evidence, including the discovery of the index fossil Hantkenina.
• Provides specific locational details, such as Bird Rock, Torquay, and Anglesea in Victoria.
• Notes a proven thickness of at least 4,000 feet for Middle Eocene beds from bore data.

Limitations

• Data format is PDF/HTML, which may require manual extraction for computational analysis.
• Column-level documentation is absent; field semantics must be inferred after download.
• Row count and dataset structure are unknown, which may limit suitability assessment.

Provenance

Source

Australian Ocean Data Network

Collection Method

Likely compiled from geological surveys, mapping, and microfaunal investigations.

Time Range

Covers the Tertiary period, with focus on Eocene to Pliocene epochs.

Freshness

Last updated 2026-04-10 17:56:47.481871; freshness should be verified.

Geography

Southeastern Australia, specifically Victoria (Torquay, Anglesea) and South Australia (Adelaide Basin).