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

The Australian Ocean Data Network provides a scientific paper on the 'Geera Clay equivalent', a regressive marine unit in the Renmark Group. The document discusses sandy clays deposited during the waning phase of the Oligocene-Middle Miocene transgression, containing marine dinoflagellates and pollen species. It proposes correlations for the Mologa weathering surface with sequence boundaries from 13.8 Ma or 10.5 Ma.

Use Cases

• Correlating regional stratigraphic units based on described sediment layers and unconformities.
• Studying marine dinoflagellate extinction events in the Middle Miocene.
• Analyzing pollen species for biostratigraphic dating in the Murray Basin.
• Modeling sea-level change and regression events during the Oligocene-Miocene.

Strengths

• Focuses on a specific geological unit ('Geera Clay equivalent') with a clear stratigraphic context.
• Includes discussion of fossil evidence (dinoflagellates, pollen) for age dating.
• Proposes specific temporal correlations (13.8 Ma, 10.5 Ma) for sequence boundaries.

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

Scientific research and analysis, likely based on field samples and laboratory study.

Time Range

Oligocene to Late Miocene

Freshness

Last updated 2026-04-10 17:54:47.267160; freshness should be verified.

Geography

Murray Basin, Australia