Cretaceous Sedimentary Rocks of the Eromanga and Surat Basins, Eastern Australia

Geoscience Australia Data provides a geological dataset covering Cretaceous sedimentary rocks underlying 1,500,000 km² of eastern Australia. The data describes depositional environments from freshwater to shallow marine, sediment composition, and transgressive-regressive cycles over about 20 million years. The dataset was last updated on 2026-03-25.

Use Cases

• Modeling ancient epicontinental sea environments based on described depositional sequences.
• Analyzing sediment provenance and composition shifts based on described quartz-rich and quartz-poor sequences.
• Studying transgressive-regressive cycles based on the described Aptian and Albian sea-level changes.
• Correlating stratigraphic sequences based on the described thicknesses of up to 2000 meters of preserved sediment.

Strengths

• Covers a vast geographic area of 1,500,000 km² in eastern Australia.
• Describes detailed geological processes over a temporal span of about 20 million years.
• Includes specific sediment thickness measurements, such as up to 2000 meters preserved in the Eromanga Basin.

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 Australian basins.

Provenance

Source

Geoscience Australia Data

Collection Method

Geological survey and analysis.

Time Range

Cretaceous period, covering sequences over about 20 million years.

Freshness

Last updated 2026-03-25 16:21:34.459988; freshness should be verified.

Geography

Eromanga and Surat Basins, eastern Australia.