Late Cretaceous-Palaeogene Nannofossil Biostratigraphy from Challenger No. 1 Well

Late Cretaceous-Palaeogene calcareous nannofossil assemblages from the Challenger No. 1 well offshore Perth Basin revise the age of the Challenger Formation type section to Middle Eocene-Oligocene. The dataset likely contains biostratigraphic data used to identify three major disconformities and compare offshore sections with onshore units. It is hosted by the Australian Ocean Data Network.

Use Cases

• Revising formation ages based on nannofossil assemblages described in the Challenger No. 1 well.
• Identifying stratigraphic discontinuities based on the three major disconformities detected in the section.
• Comparing offshore marine Palaeogene continuity with onshore units like the Kings Park Formation.
• Correlating age equivalents of Paleocene and Eocene hemipelagic rock units biostratigraphically.

Strengths

• The dataset provides a revised age for the Challenger Formation type section, a key geological unit.
• It identifies three specific disconformities: at the Eocene/Oligocene boundary, Cretaceous/Tertiary boundary, and within the Campanian.
• The description compares the section's completeness with 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 presented in PDF/HTML formats, which may require extraction for analysis.

Provenance

Source

Australian Ocean Data Network

Collection Method

Biostratigraphic analysis of calcareous nannofossil assemblages from a well core.

Time Range

Late Cretaceous to Palaeogene (Campanian to Oligocene).

Freshness

Last updated 2026-05-05 04:20:25.921812; freshness should be verified.

Geography

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