The Otway Basin in southern Australia contains the Early Cretaceous Eumeralla Formation, a volcaniclastic sedimentary sequence. Geoscience Australia Data analyzed wireline logs and sedimentary data to define four basin-wide lithostratigraphic units, interpreting their depositional environments from coal swamps to high-energy stream channels. The data suggests a single integrated drainage system persisted in the basin from the Aptian to the late Albian, influenced by sea-level changes and intrabasinal volcanism.
Use Cases
- Stratigraphic correlation and basin analysis based on the four defined lithostratigraphic units (Eumeralla I-IV)
- Reconstructing paleoenvironments and depositional systems based on described facies like coal swamps, flood plains, and freshwater lakes
- Modeling basin evolution and drainage patterns based on inferences about a single integrated drainage system and its volcanic controls
Strengths
- Analysis is based on wireline-log data and a range of sedimentary data
- Defines four distinct lithostratigraphic units with specific compositions (e.g., Eumeralla I: siltstone/mudstone/sandstone/coal)
- Correlates lithological variations with Aptian-Albian sea-level changes
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 as the last update date is 2026-05-14
Provenance
- Source
- Geoscience Australia Data
- Collection Method
- Wireline-log analysis and sedimentary facies analysis of outcrops
- Time Range
- Early Cretaceous (Aptian to Albian stages)
- Freshness
- Last updated 2026-05-14 03:53:40.226289
- Geography
- Otway Basin, southern Australia