Nannofossil and Planktic Foraminiferal Biostratigraphy in the Indo-Pacific Region

A study of the Oligocene-Miocene boundary in the Indo-Pacific region, analyzing nannofossil and planktic foraminiferal evidence from marginal-marine and deep oceanic sediments. The dataset, from Geoscience Australia Data, suggests revisions to biostratigraphic zones based on the depth-related appearance of species like Globigerinoides quadrilobatus primordius. It was last updated on 2026-05-14.

Use Cases

• Refining biostratigraphic zonation based on the lowest occurrence of Globigerinoides quadrilobatus primordius.
• Correlating stratigraphic events between shallow marginal-marine and deep oceanic sediments.
• Investigating the timing and definition of the Oligocene-Miocene boundary using nannofossil and foraminiferal datums.
• Studying paleoenvironmental changes related to bathymetric shifts of the lysocline and carbonate compensation depth.

Strengths

• Focuses on a key geological boundary (Oligocene-Miocene) with implications for global stratigraphy.
• Compares evidence from multiple sediment types (marginal-marine and deep oceanic) across the Indo-Pacific region.
• Cites specific fossil species and datums, such as Sphenolithus ciperoensis and Globigerinoides quadrilobatus primordius.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.
• Data files are in PDF and HTML formats, which may require extraction for quantitative analysis.

Provenance

Source

Geoscience Australia Data

Collection Method

Biostratigraphic analysis of sediment sections and literature review.

Time Range

Late Oligocene to early Miocene

Freshness

Last updated 2026-05-14 09:30:14.147505; freshness should be verified.

Geography

Indo-Pacific region