Great Barrier Reef Carbonate Foundation Lithology and Diagenesis

A relatively thin Holocene reef, less than 20 meters thick, has developed on a foundation of older reefs extending up to 420 meters deep in the southern Great Barrier Reef. Petrographic analysis reveals the late Pleistocene reef limestones were subjected to near-surface subaerial diagenesis in vadose and phreatic freshwater zones. This dataset from the Australian Ocean Data Network, last updated in 2026, documents the lithology and diagenetic processes of these carbonate foundations.

Use Cases

• Modeling reef growth history based on the described succession of Holocene, late Pleistocene, and middle Miocene foundations.
• Analyzing the impact of sea-level changes on reef diagenesis based on the described solution unconformity and subaerial exposure features.
• Comparing Pleistocene and Holocene reef environments based on the described duplication of environments and differences in Halimeda limestone abundance.
• Studying neomorphic replacement and cementation processes in carbonate skeletons based on the described aragonite-to-calcite transformations.

Strengths

• Dataset includes depth-specific information up to 420 meters in the subsurface.
• Description provides specific geological processes like vadose and phreatic diagenesis and thin-film transformation.

Limitations

• Row count is unknown, which may limit suitability assessment.
• Column-level documentation is absent; field semantics must be inferred after download.
• Data may reflect geographic bias inherent to data_gov_au, focusing solely on the southern Great Barrier Reef.

Provenance

Source

Australian Ocean Data Network

Collection Method

Likely derived from petrographic analysis of drill core samples.

Time Range

Ranges from middle Miocene to Holocene.

Freshness

Last updated 2026-04-16 08:50:44.256638; freshness should be verified.

Geography

Southern Great Barrier Reef.