Eumeralla Formation: Lower Cretaceous Volcaniclastic Stratigraphy in the Otway Basin

The Early Cretaceous Eumeralla Formation comprises four informal lithostratigraphic units identified through wireline-log analysis and sedimentary data. Geoscience Australia Data published this analysis, which was last updated on 2026-04-30. The units represent depositional environments ranging from coal swamps and flood plains to freshwater lakes and high-energy stream channels.

Use Cases

• Modeling basin drainage evolution based on the described basin-wide, integrated drainage system.
• Correlating sedimentary facies with Aptian-Albian sea-level changes as suggested in the description.
• Analyzing the influence of intrabasinal volcanism on sedimentation patterns and lithology.
• Stratigraphic mapping of the four distinct lithostratigraphic units (Eumeralla I-IV) across the Otway Basin.

Strengths

• Analysis is based on wireline-log data and a range of sedimentary data, suggesting a multi-method approach.
• The description details four distinct lithostratigraphic units with specific lithological compositions.
• Sedimentary facies analysis of outcropping units is mentioned, providing ground-truth for interpretations.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.
• The data files are in PDF and HTML formats, which may require extraction for computational analysis.

Provenance

Source

Geoscience Australia Data

Collection Method

Wireline-log analysis and sedimentary facies analysis of outcrops.

Time Range

Early Cretaceous (Aptian-Albian)

Freshness

Last updated 2026-04-30 13:57:25.079400; freshness should be verified.

Geography

Otway Basin, southern Australia