Oligocene-Miocene Marine Sediments and Pollen in the Murray Basin

AODN data details sandy clays and the Geera Clay unit deposited during the Oligocene to Middle Miocene transgression in the Murray Basin. It includes analysis of marine dinoflagellates and three pollen species, one newly described. The dataset was published by the Australian Ocean Data Network and last updated in April 2026.

Use Cases

• Correlating the Mologa weathering surface to global 13.8 Ma or 10.5 Ma sequence boundaries using dinoflagellate extinction data.
• Biostratigraphic analysis using the described pollen species, including the new species Tetrapollis campbellbrownii.
• Interpreting depositional environments from the lateral grading of sandy clays into fluvio-lacustrine sediments of the Renmark Group.

Strengths

• Provides specific age constraints linking local geology to global sea-level events (13.8 Ma, 10.5 Ma).
• Includes descriptions and illustrations of three pollen species for biostratigraphic application.

Limitations

• Data is presented in PDF/HTML formats, limiting direct computational analysis.
• The spatial extent is confined to the Murray Basin, reducing broader applicability.

Provenance

Source

Australian Ocean Data Network

Collection Method

null

Time Range

Oligocene to Middle Miocene

Freshness

null

Geography

Murray Basin, Australia