Cape Range Structure Geology: Stratigraphy and Micropalaeontology of Western Australia

Western Australia's Cape Range Structure is a closed anticline in Tertiary limestones at least 80 miles long and 20 miles wide. The dataset, from Geoscience Australia, describes five Tertiary formations, vertical closure of 1200 feet, and potential oil drainage areas. It was last updated on 2026 05 14.

Use Cases

• Model subsurface geology based on described stratigraphic column and formation thicknesses.
• Assess hydrocarbon potential based on the structure's vertical closure and closed area of 1200 square miles.
• Study Tertiary micropalaeontology for biostratigraphic dating of the Mandu, Tulki, and Trealla Limestones.
• Analyze basin evolution based on the described Cretaceous, Eocene, and older marine sediment thicknesses.

Strengths

• Provides specific dimensions for the structure: at least 80 miles long, 20 miles wide, with 1200 feet of vertical closure.
• Describes five named Tertiary formations with reported thickness ranges, such as the 265-foot Mandu Calcarenite.
• Includes estimates for underlying sediment thickness, suggesting up to 18,000 feet of Permian to Devonian strata.

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 and HTML documents, which may require extraction for computational analysis.

Provenance

Source

Geoscience Australia Data

Collection Method

Geological survey and analysis.

Time Range

Tertiary period (Miocene, Pliocene) and older.

Freshness

Last updated 2026-05-14 09:32:47.170755; freshness should be verified.

Geography

Cape Range Structure, North-West Cape peninsula, Western Australia, Carnarvon Basin.