Ninmaroo Formation: Upper Cambrian-Lower Ordovician Carbonate Sediment Lithofacies

The Australian Ocean Data Network hosts data on the Ninmaroo Formation, an epeiric carbonate sequence in the Georgina Basin. It describes lithofacies including ooid, peloid, skeletal, and dolostone units, detailing sedimentation in a shallow epicontinental sea under varying salinity conditions. The dataset was last updated on 2026-06-17.

Use Cases

• Modeling ancient carbonate platform environments based on described lithofacies patterns.
• Analyzing cyclic sedimentation patterns linked to storm-driven shoaling events.
• Reconstructing paleosalinity gradients from the distribution of skeletal and non-skeletal carbonate facies.
• Studying diagenetic processes in carbonate rocks based on the late diagenetic dolostone lithofacies.

Strengths

• The description provides a detailed geological context, specifying the formation, basin, and time period (Upper Cambrian-Lower Ordovician).
• It enumerates multiple specific lithofacies types, including ooid, peloid, flat-pebble conglomerate, skeletal, and dolostone.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.
• Data may reflect geographic/temporal bias inherent to data_gov_au.

Provenance

Source

Australian Ocean Data Network

Time Range

Upper Cambrian-Lower Ordovician

Freshness

Last updated 2026-06-17 01:49:37.100129; freshness should be verified.

Geography

Georgina Basin