Mesozoic Sediment Stratigraphy and Palynology from the Great Australian Bight

Palynological investigation of dredged samples from the Great Australian Bight continental slope correlates bulk palynofloras with the Maastrichtian to earliest Paleocene Forcipites longus and Manumiella druggii zones. The data, sourced from Geoscience Australia, indicates these zones are characteristic of the upper Potoroo Formation, which is widespread in the Bight and Duntroon Basins. Environments of deposition ranged from paralic to marine, with evidence of lowland temperate rainforests on the Australian side of the rift during the Campanian-Maastrichtian.

Use Cases

• Correlating sedimentary formations across basins based on described palynological zones.
• Reconstructing ancient depositional environments (paralic to marine) from the palynomorph assemblages.
• Investigating the provenance of Maastrichtian sequences using data on recycled Permian and Cretaceous palynomorphs.
• Modeling paleoclimate and vegetation (lowland temperate rainforests) during the Campanian-Maastrichtian in the rift zone.

Strengths

• Analysis links palynofloras to specific geological formations (Potoroo, Wigunda, Ceduna) and biozones.
• Samples provide temporal coverage from Santonian to Maastrichtian, with one indicating an Early Cretaceous source.
• Data includes environmental interpretation, specifying deposition ranged from paralic to marine.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.
• Data may reflect geographic/temporal bias inherent to the specific dredge samples from the BMR Rig Seismic Cruise 66.

Provenance

Source

Geoscience Australia Data

Collection Method

Palynological investigation of samples dredged from the continental slope and submarine canyon walls during BMR Rig Seismic Cruise 66.

Time Range

Mesozoic era, with specific focus on Santonian to Maastrichtian (Late Cretaceous) and earliest Paleocene, with some Early Cretaceous and recycled Permian indicators.

Freshness

Last updated 2026-04-20 02:48:02.663238; freshness should be verified.

Geography

Great Australian Bight area, southern Australia, specifically the offshore Bight and Duntroon Basins.