Permian Yessabah Limestone Sequence Analysis and Depositional Models

Sequence analysis details the depositional history of a thick crinoidal limestone unit in eastern Australia. The study documents the formation's role within a major sea-level cycle, from lowstand gravels to transgressive limestone and highstand turbidites. The Australian Ocean Data Network published this geological analysis.

Use Cases

• Modeling transgressive systems tract deposition using facies associations described for the Yessabah Limestone.
• Analyzing the alternation of crinoid-rich and bryozoan-rich units to understand faunal dominance shifts.
• Correlating the Parrabel Beds (lowstand) and Warbro Formation (highstand) with the central limestone unit to reconstruct the full depositional sequence.
• Studying the impact of a major Carboniferous-Permian boundary sea-level fall on basin facies distribution.

Strengths

• Analysis covers a complete depositional sequence including lowstand, transgressive, and highstand systems tracts.
• Provides a detailed facies model for a thick, regionally extensive crinoidal limestone unit.

Limitations

• Data is presented as a published study (PDF/HTML), not as a structured, queryable dataset.
• Sample data, column definitions, and quantitative measurements are unavailable for direct computational analysis.
• Geographic scope is specific to the Hastings Block in New South Wales, limiting broader regional application.

Provenance

Source

Australian Ocean Data Network, likely originating from geological survey or academic research.

Collection Method

Geological field study and sequence stratigraphic analysis.

Time Range

Permian period, following a sea-level fall at the Carboniferous-Permian boundary.

Freshness

Record last updated in April 2026, indicating maintained metadata.

Geography

Hastings Block, Manning-Macleay Basin, northeastern New South Wales, eastern Australia.