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

Geoscience Australia Data provides biostratigraphic data from the Challenger No. 1 well, offshore Perth Basin. The dataset contains Late Cretaceous to Palaeogene calcareous nannofossil assemblages used to revise the age of the Challenger Formation type section. It identifies three major disconformities and compares the section's completeness to nearby Deep Sea Drilling Project sites.

Use Cases

• Revising geological formation ages based on biostratigraphic marker fossils mentioned in the description.
• Correlating offshore and onshore sedimentary units based on described nannofossil assemblages.
• Identifying unconformities or condensed sections in the geological record based on the three major disconformities detected.
• Comparing the completeness of geological sections against coeval sequences from other drilling sites.

Strengths

• Data is from a type section (Challenger Formation), providing a key reference point.
• Description identifies three specific disconformities: at the Eocene/Oligocene boundary, Cretaceous/Tertiary boundary, and within the Campanian.
• The section is described as more complete than coeval sections at 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.
• Data is provided as PDF/HTML reports, not a structured tabular format, requiring extraction.

Provenance

Source

Geoscience Australia Data

Collection Method

Biostratigraphic analysis of well core samples.

Time Range

Late Cretaceous to Palaeogene

Freshness

Last updated 2026-05-14 04:53:37.941906; freshness should be verified.

Geography

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