Late Cretaceous-Palaeogene nannofossil biostratigraphy of Challenger No. 1 well (Challenge

Western Australia's offshore Perth Basin contains calcareous nannofossil assemblages from the Challenger No. 1 well, above the 780m level. The data, provided by the Australian Ocean Data Network, revises the age of the Challenger Formation type section and identifies three major disconformities within the Late Cretaceous-Palaeogene sequence.

Use Cases

• Refining lithostratigraphic unit correlations based on biostratigraphic age equivalents mentioned in the description.
• Studying marine Palaeogene continuity in offshore versus onshore basins based on the described sections.
• Identifying major disconformities or condensed sections within the Cretaceous-Palaeogene boundary interval.
• Comparing Late Cretaceous-Palaeogene completeness with coeval sections from nearby Deep Sea Drilling Project sites.

Strengths

• Data revises the age of the Challenger Formation type section from Late Eocene to Middle Eocene-Oligocene.
• Identifies three major disconformities: at the Eocene/Oligocene boundary, Cretaceous/Tertiary boundary, and within the Campanian.
• Compares the section's completeness with coeval sections from nearby Deep Sea Drilling Project sites.

Limitations

• 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 analysis from well samples.

Time Range

Late Cretaceous to Palaeogene (Campanian to Oligocene).

Freshness

Last updated 2026-06-17 01:03:56.416420; freshness should be verified.

Geography

Challenger No. 1 well, offshore Perth Basin, Western Australia.