River Supersequence: Stratigraphic Data for the Lawn Hill Platform, Australia

Geoscience Australia provides data on the Proterozoic River Supersequence, a stratigraphic unit in the Isa Superbasin. The dataset describes an approximately 15-million-year sedimentary cycle reaching a maximum thickness of 3300 meters, characterized by siliciclastic and carbonate facies, syndepositional faulting, and base-metal mineralization. It integrates information from outcrops, drillholes, and reflection seismic imaging across the Lawn Hill Platform and McArthur Basin.

Use Cases

• Modeling basin partitioning and accommodation cycles based on described synsedimentary fault movement.
• Analyzing facies distribution and depositional environments based on described fluvial, shoreface, and turbidite systems.
• Investigating stratigraphic controls on mineralization based on the three described levels of base-metal mineralisation.

Strengths

• Maximum thickness of the supersequence is quantified at 3300 meters.
• Duration of the accommodation cycle is specified as approximately 15 million years.
• The description integrates data from multiple sources: outcrops, drillholes, and seismic imaging.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.
• Freshness should be verified; last metadata update was 2026-05-14.

Provenance

Source

Geoscience Australia Data

Collection Method

Compiled from field observations, drillhole data, and seismic analysis.

Time Range

Proterozoic era

Freshness

Last updated 2026-05-14 04:54:57.376186

Geography

Lawn Hill Platform and McArthur Basin, northern Australia