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

The 'Geera Clay equivalent' dataset from the Australian Ocean Data Network describes sandy clays deposited during the Oligocene-Middle Miocene transgression in the Murray Basin. The data includes information on marine dinoflagellates and pollen species, including one newly described species, Tetrapollis campbellbrownii. It was last updated on 2026-05-04.

Use Cases

• Correlating regional stratigraphic units based on described marine dinoflagellate extinction events.
• Dating the Mologa weathering surface by linking it to global sequence boundaries mentioned in the description.
• Analyzing pollen biostratigraphy for the Murray Basin using the three illustrated species.
• Studying the transition from marine to fluvio-lacustrine environments during the Oligocene-Middle Miocene regression.

Strengths

• Includes biostratigraphic data from marine dinoflagellates and pollen species.
• Describes a newly identified species, Tetrapollis campbellbrownii.
• Links geological units to specific global sequence boundaries (13.8 Ma and 10.5 Ma).

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 contains geological and paleontological observations from scientific research.

Time Range

Oligocene to Middle Miocene

Freshness

Last updated 2026-05-04 23:55:21.987080; freshness should be verified.

Geography

Murray Basin, Australia