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

Late Cretaceous-Palaeogene calcareous nannofossil assemblages from the Challenger No. 1 well provide a revised age for the Challenger Formation type section. The data, sourced from the Australian Ocean Data Network, identifies three major disconformities and shows the section is more complete than coeval sections from nearby Deep Sea Drilling Project sites.

Use Cases

• Refining age models for offshore carbonate sequences based on nannofossil biostratigraphy.
• Correlating marine Palaeogene sections between offshore wells and canyons.
• Identifying stratigraphic gaps and condensed sections within the Late Cretaceous-Palaeogene interval.

Strengths

• Data revises the age of the Challenger Formation type section from Late Eocene to Middle Eocene-Oligocene.
• Identifies three major disconformities at specific stratigraphic boundaries.
• Compares completeness of the section to 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

Biostratigraphic analysis of calcareous nannofossil assemblages from a well core.

Time Range

Late Cretaceous to Palaeogene (Santonian to Oligocene)

Freshness

Last updated 2026-04-10 19:16:15.615251; freshness should be verified.

Geography

Offshore Perth Basin, Western Australia (Challenger No. 1 well)