Nannofossil and Planktic Foraminiferal Biostratigraphy in the Indo-Pacific

Australian Ocean Data Network provides a study on biostratigraphy around the Oligocene-Miocene boundary. The dataset, last updated in 2026, examines the depth-related appearance of microfossil species like Globigerinoides quadrilobatus primordius across shallow and deep marine sediments in the Indo-Pacific region. It proposes a combined planktic foraminiferal zone and a buffer zone for the boundary transition.

Use Cases

• Calibrating the Oligocene-Miocene boundary based on microfossil datums mentioned in the description
• Analyzing depth-related stratigraphic ranges of species like Globigerinoides quadrilobatus primordius
• Comparing biostratigraphic events between hemipelagic and oceanic sediments as discussed
• Studying the co-occurrence of species such as Globorotalia opima opima and G. quadrilobatus primordius

Strengths

• Focuses on a specific geological boundary (Oligocene-Miocene) with detailed stratigraphic analysis
• Compares evidence from three marginal-marine sections and deep oceanic sediments
• Proposes specific biostratigraphic zones (N3/4) and a buffer zone based on the findings

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 findings from field studies and literature review of marginal-marine sections.

Time Range

Late Oligocene to early Miocene geological period.

Freshness

Last updated 2026-04-10 19:43:06.217998; freshness should be verified

Geography

Indo-Pacific region.