Geera Clay Equivalent: Oligocene-Miocene Marine Sediment Data for the Murray Basin

Oligocene to Middle Miocene sandy clays from the Murray Basin, deposited during a marine transgression. The dataset, from Geoscience Australia Data, includes descriptions of marine dinoflagellates and pollen species, with one new species described. It was last updated on 2026-04-20.

Use Cases

• Dating regional unconformities based on marine dinoflagellate extinction events.
• Correlating sedimentary sequences based on pollen biostratigraphy.
• Reconstructing paleoenvironmental changes during the Oligocene-Miocene transition.

Strengths

• Includes biostratigraphic data from marine dinoflagellates and pollen.
• Focuses on a specific geological unit (Geera Clay equivalent) with regional significance.
• Proposes correlation with a known global sequence boundary (10.5 Ma).

Limitations

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

Provenance

Source

Geoscience Australia Data

Collection Method

Geological and paleontological analysis of sediment samples.

Time Range

Oligocene to Middle Miocene

Freshness

Last updated 2026-04-20 02:22:55.646570; freshness should be verified.

Geography

Murray Basin, Australia