Geology of the Southern McArthur Basin: Stratigraphic Groups and Rock Formations

A geological bulletin describes the stratigraphy and structure of the southern McArthur Basin in Australia's Northern Territory. The sequence is divided into four stratigraphic groups, including the Tawallah Group (~4500 m thick) and the combined McArthur and Nathan Groups (~5500 m thick). The data was published by Geoscience Australia and was last updated on 2026-05-14.

Use Cases

• Modeling basin evolution based on described stratigraphic groups and unconformities.
• Analyzing depositional environments based on described peritidal, lagoonal, and fluvial features.
• Studying mineral potential based on mentions of copper-bearing breccia pipes and potassium-rich felsic rocks.
• Reconstructing paleoclimate based on described evaporite pseudomorphs and desiccation features.

Strengths

• Provides detailed stratigraphic thicknesses, such as the Tawallah Group at about 4500 meters.
• Includes specific geochronological data, such as a U-Pb age of 1690125 Ma from tuffs.
• Describes structural features like the Batten Fault Zone and estimated sedimentary rock thicknesses up to 12 km.

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 documents, which may require extraction for computational analysis.

Provenance

Source

Geoscience Australia Data

Time Range

Mid-Proterozoic (crystallization age of basement ~1800 Ma, deposition ages for groups including 1690 Ma).

Freshness

Last updated 2026-05-14 05:07:26.508253; freshness should be verified.

Geography

Southern McArthur Basin, Northern Territory, Australia.