Late Cretaceous-Palaeogene Nannofossil Biostratigraphy of Offshore Perth Basin

Geoscience Australia data details calcareous nannofossil assemblages from the Challenger No. 1 well in the offshore Perth Basin. The analysis revises the age of the Challenger Formation type section and identifies three major disconformities within the Late Cretaceous-Palaeogene sequence.

Use Cases

• Correlate biostratigraphic age assignments for the Challenger and Porpoise Bay Formations using identified nannofossil assemblages.
• Analyze the three detected disconformities at the Eocene/Oligocene, Cretaceous/Tertiary, and Campanian boundaries for stratigraphic completeness studies.
• Compare Late Cretaceous-Palaeogene nannofossil assemblages between the Challenger No. 1 well and the Perth Canyon carbonate succession.

Strengths

• Data provides a revised age interpretation for the Challenger Formation type section, shifting from Late Eocene to Middle Eocene-Oligocene.
• Identifies three specific stratigraphic disconformities within the well section, detailing missing intervals like the lowermost Oligocene and Maastrichtian.
• Compares the offshore section's completeness against coeval sections from Deep Sea Drilling Project sites in the Perth Abyssal Plain.

Limitations

• Dataset size, row count, and column structure are unknown, limiting quantitative analysis.
• Primary data formats are HTML and PDF, requiring manual extraction for structured computational use.
• Sample data is unavailable, preventing immediate assessment of data granularity or variable types.

Provenance

Source

Geoscience Australia Data

Collection Method

null

Time Range

Late Cretaceous to Palaeogene

Freshness

null

Geography

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