Oligocene-Miocene Boundary Biostratigraphy in the Indo-Pacific Region

Nannofossil and planktic foraminiferal data from three marginal-marine sections in the Indo-Pacific region, published by Geoscience Australia. The dataset examines the stratigraphic appearance of species like Globigerinoides quadrilobatus primordius and Sphenolithus ciperoensis to refine the Oligocene-Miocene boundary. It was last updated on 2026-03-25.

Use Cases

• Calibrating the Oligocene-Miocene boundary based on nannofossil extinction and appearance datums described in the study.
• Analyzing depth-related biostratigraphic events, such as the first occurrence of Globigerinoides quadrilobatus primordius.
• Correlating planktic foraminiferal zones (N.3 and N.4) using species overlap evidence from the Indo-Pacific region.
• Studying the impact of bathymetry and sediment type (hemipelagic vs. oceanic) on fossil record timing.

Strengths

• Focuses on a specific and debated geological boundary (Oligocene-Miocene).
• Compares evidence from multiple sediment types (marginal-marine and deep oceanic) and sections.
• References specific fossil species and datums (e.g., Sphenolithus ciperoensis, Globigerinoides quadrilobatus primordius).

Limitations

• Row count is unknown, which may limit suitability assessment.
• Column-level documentation is absent; field semantics must be inferred after download.

Provenance

Source

Geoscience Australia Data

Collection Method

Likely contains biostratigraphic data from field studies and literature review, as described.

Time Range

Late Oligocene to early Miocene geological period.

Freshness

Last updated 2026-03-25 15:40:16.733108; freshness should be verified.

Geography

Indo-Pacific region.