Eustatic sea-level changes are used to correlate Late Permian coal-bearing sequences across the Sydney, Gunnedah, and Bowen Basins in eastern Australia. The Dempsey Formation, Black Alley Shale, and MacMillan Formation are identified as deposited during the same eustatic highstand, while the Kulnura Marine Tongue and lower Burngrove Formation are attributed to tectonism. This dataset, hosted by the Australian Ocean Data Network, indicates deposition began later in the Bowen Basin than in the Sydney and Gunnedah Basins.
Use Cases
- Correlating sedimentary sequences across basins based on eustatic sea-level change events described.
- Identifying tectonic versus eustatic controls on marine intercalations within terrestrial sequences.
- Analyzing the timing of Late Permian coal measure deposition across different basins.
- Cross-referencing stratigraphic correlations with palynological and marine macrofossil studies.
Strengths
- Correlations are consistent with independent palynological conclusions mentioned in the description.
- Methodology distinguishes between eustatic and tectonic origins for marine beds.
- Focuses on three major sedimentary basins (Sydney, Gunnedah, Bowen) in eastern Australia.
Limitations
- Column-level documentation is absent; field semantics must be inferred after download.
- Row count is unknown, which may limit suitability assessment.
- Data is presented in PDF/HTML formats, which may require extraction for tabular analysis.
Provenance
- Source
- Australian Ocean Data Network
- Collection Method
- Likely derived from geological research and stratigraphic analysis.
- Time Range
- Late Permian period.
- Freshness
- Last updated 2026-05-05 01:50:29.549588; freshness should be verified.
- Geography
- Sydney, Gunnedah, and Bowen Basins in eastern Australia.