Eocene Calcareous Nannofossil Biostratigraphy from the Otway Basin, Australia

Biostratigraphic event sequences derived from middle to late Eocene calcareous nannofossil assemblages in four sections of the Otway Basin, southeastern Australia. The dataset compares nannofossil and foraminiferal biostratigraphy and analyzes sedimentation patterns. It was published by Geoscience Australia and last updated on 2026-04-20.

Use Cases

• Refine foraminiferal biostratigraphic zonations based on comparisons with nannofossil events described in the study.
• Analyze diachroneity of Eocene marine sedimentation in the Otway Basin based on described transgressive rock units and isolated assemblages.
• Study paleoenvironmental conditions, such as temperate surface-water temperatures and shallow marine deposition, as described for the Australian southern margin.

Strengths

• Event sequence spans a defined interval from the lowest appearance of Cyclicargolithus reticulatus to the disappearance of Discoaster saipanensis.
• Data compares biostratigraphy with a counterpart in New Zealand and against tropical planktic foraminiferal P. zones.
• Study assesses sedimentation rates and conditions across multiple locations (Gambier Embayment, Browns Creek, Castle Cove).

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 bias inherent to the Otway Basin study area.

Provenance

Source

Geoscience Australia Data

Collection Method

Study of calcareous nannofossil assemblages from four sections in the Otway Basin.

Time Range

Middle to late Eocene

Freshness

Last updated 2026-04-20 02:14:51.174123; freshness should be verified.

Geography

Otway Basin, southeastern Australia