Murray Canyons Geomorphology and Evolution on the Australian Southern Margin

Latest Miocene-Pleistocene geological history of the Murray Canyons, a group of submarine canyons off Kangaroo Island, South Australia. The dataset, from Geoscience Australia Data, describes canyon dimensions, profiles, and formation processes, with some canyons descending 5200 meters and having walls 2 km high. It details episodic down-cutting since the latest Cretaceous, with peak activity linked to glacioeustatic cycles since the Oligocene.

Use Cases

• Modeling submarine canyon evolution based on described thalweg profiles and gradient changes.
• Analyzing the impact of rift structures on canyon morphology based on the control of WNW-trending Jurassic-Cretaceous features.
• Studying sediment transport and turbidite deposition based on described large holes gouged by turbidity currents.
• Correlating canyon development phases with major unconformities in adjacent basins based on the described timing of down-cutting events.

Strengths

• Describes specific, large-scale geomorphic features, including canyons up to 80 km long and 5200 m deep.
• Provides detailed quantitative metrics such as wall slopes of 15°-22° and a continental margin narrowing to 65 km.
• Outlines a multi-million-year temporal framework for canyon development, from the latest Cretaceous to the Pleistocene.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.
• Data may reflect geographic bias inherent to data_gov_au, focusing solely on the Australian margin.

Provenance

Source

Geoscience Australia Data

Time Range

Latest Cretaceous to Pleistocene, with detailed phases from early Paleocene to latest Miocene-Pleistocene.

Freshness

Last updated 2026-04-30 13:51:23.189733; freshness should be verified.

Geography

Continental slope off Kangaroo Island, South Australia, on the Australian Southern Margin.