Eumeralla Formation: Fluvial System Data from the Otway Basin, Australia

Three discrete depositional systems with sandstone bodies up to 70 meters thick are distinguished by their facies associations and palaeocurrent data. Geoscience Australia Data published this analysis of the Lower Cretaceous Eumeralla Formation, characterizing high-energy fluvial flows in broad channel tracts. The data supports a model of volcaniclastic sediment dispersal within the Aptian-Albian Otway rift basin.

Use Cases

• Modeling ancient fluvial architecture based on described multistorey sandstone bodies and interchannel siltstones.
• Analyzing sediment provenance and mixing based on the described proportions of basement-derived quartzose material and volcaniclastic sand.
• Reconstructing palaeogeography based on the distinct southerly, north-easterly, and northwesterly palaeocurrent trends for each system.
• Interpreting depositional environments (e.g., alluvial fan vs. braid plain) based on the described facies associations and fluvial architecture.

Strengths

• Identifies three discrete depositional systems (A-C) with specific thickness measurements, such as sandstone bodies up to 70 meters thick.
• Includes directional palaeocurrent data for each system, aiding in paleogeographic reconstruction.
• Provides a sedimentological model linking deposition to Aptian-Albian volcanic activity and rift basin structure.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment for quantitative analysis.
• Data is presented in PDF/HTML formats, which may require extraction for computational use.

Provenance

Source

Geoscience Australia Data

Collection Method

Field analysis of outcrops in the eastern Otway Basin, likely involving sedimentary logging and palaeocurrent measurement.

Time Range

Lower Cretaceous (Aptian-Albian)

Freshness

Last updated 2026-04-30 15:21:18.700017; freshness should be verified.

Geography

Otway Basin, southern Australia (specific areas include Cape Otway, Apollo Bay, Moonlight Head, Skenes Creek)