Nannofossil and planktic foraminiferal biostratigraphy around the Oligocene-Miocene bounda

Indo-Pacific region sediment sections provide biostratigraphic data for studying the Oligocene-Miocene boundary. The dataset, sourced from the Australian Ocean Data Network, includes evidence on species occurrences like Globigerinoides quadrilobatus primordius and Sphenolithus ciperoensis. It was last updated in June 2026.

Use Cases

• Correlating stratigraphic zones based on the lowest occurrence of Globigerinoides quadrilobatus primordius.
• Investigating depth-related differences in fossil first appearances between shallow marginal-marine and deep oceanic sediments.
• Defining a buffer zone for the Oligocene-Miocene transition using extinction and range base datums.
• Studying the co-occurrence of Globorotalia opima opima and G. quadrilobatus primordius for zonal revision.

Strengths

• Focuses on a specific and globally significant geological boundary (Oligocene-Miocene).
• Compares data from multiple sediment types (hemipelagic, marginal-marine, oceanic) across the Indo-Pacific region.
• Cites specific fossil species and datums (e.g., Sphenolithus ciperoensis extinction) for event definition.

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 Australian Ocean Data Network platform.

Provenance

Source

Australian Ocean Data Network

Collection Method

Likely contains observational data from sediment core analysis and literature review.

Time Range

Late Oligocene to Early Miocene

Freshness

Last updated 2026-06-04 06:32:58.087490; freshness should be verified.

Geography

Indo-Pacific region