Oligocene-Miocene Boundary Biostratigraphy in the Indo-Pacific Region

A study of nannofossil and planktic foraminiferal evidence from the Oligocene-Miocene boundary interval. The dataset, hosted by the Australian Ocean Data Network, includes observations from three marginal-marine sections and deep oceanic sediments within the Indo-Pacific region. It was last updated on 2026-06-23.

Use Cases

• Refining planktic foraminiferal zonation based on the lowest occurrence of Globigerinoides quadrilobatus primordius.
• Investigating bathymetric controls on fossil first occurrences based on comparisons between shallow marginal-marine and deep oceanic sediments.
• Delineating the Oligocene-Miocene transition interval using nannofossil datums like Sphenolithus ciperoensis and Sphenolithus belemnos.

Strengths

• Focuses on a key geological boundary, the Oligocene-Miocene transition.
• Compares data from multiple sediment types (marginal-marine and deep oceanic).
• Discusses specific fossil species and bioevents, such as the extinction of Sphenolithus ciperoensis.

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 biostratigraphic observations and analyses from scientific literature and field studies.

Time Range

Late Oligocene to early Miocene

Freshness

Last updated 2026-06-23 01:11:14.414506; freshness should be verified

Geography

Indo-Pacific region