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

Late Cretaceous-Palaeogene calcareous nannofossil assemblages from the Challenger No. 1 well, offshore Perth Basin, Western Australia. The data, published by Geoscience Australia, revises the age of the Challenger Formation type section from Late Eocene to Middle Eocene-Oligocene and identifies three major disconformities. This section is described as more complete than coeval sections from nearby Deep Sea Drilling Project sites.

Use Cases

• Refining regional stratigraphic frameworks based on nannofossil assemblage correlations.
• Identifying geological disconformities and condensed sections based on biostratigraphic data.
• Comparing offshore and onshore marine Palaeogene sequences in the Perth Basin.
• Revising the age and facies relationships of geological formations like the Challenger and Porpoise Bay Formations.

Strengths

• Data revises the age of the Challenger Formation type section, providing a new interpretation.
• Identifies three major disconformities, offering a detailed stratigraphic breakdown.
• Compares completeness with nearby Deep Sea Drilling Project sites, providing regional context.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.
• Data is provided as PDF/HTML reports, which may require extraction for computational analysis.

Provenance

Source

Geoscience Australia Data

Collection Method

Biostratigraphic analysis of calcareous nannofossil assemblages from a well core.

Time Range

Late Cretaceous (Campanian/Santonian) to Palaeogene (Eocene/Oligocene).

Freshness

Last updated 2026-03 25 18:37:26.674908; freshness should be verified.

Geography

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