Great Barrier Reef Seabed Sediments and Geomorphology, Regional Synthesis

Over 3,000 sediment samples from Geoscience Australia's MARS database provide a regional synthesis of the inter-reefal seabed, which comprises 95% of the Great Barrier Reef Marine Park area. This dataset offers new quantitative information on surface sediment trends and geomorphic features, refining the facies model for the mixed carbonate-siliciclastic margin. The analysis reveals regional patterns and local-scale characteristics of sediment distribution, including gravel, sand, and mud concentrations across the shelf.

Use Cases

• Model seabed habitat distribution based on sediment grain size and geomorphic features.
• Analyze regional sediment trends to refine carbonate-siliciclastic margin facies models.
• Support marine park zoning and management with physical seabed characteristics.
• Map the distribution of gravel, sand, and mud concentrations across the inner, middle, and outer shelves.

Strengths

• Contains over 3,000 sediment samples, substantially improving data coverage for inter-reefal areas.
• Represents the first regional synthesis of surface sedimentology and geomorphology for the GBR since pioneering work in the late 20th century.
• Provides a quantitative dataset revealing both regional trends and local-scale facies characteristics.

Limitations

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

Provenance

Source

Australian Ocean Data Network, integrating data from Geoscience Australia's MARS database and Geomorphic Features dataset.

Collection Method

Spatial analysis and synthesis of existing sample databases and geomorphic feature datasets.

Freshness

Last updated 2026-06-05 07:26:40.626089; freshness should be verified.

Geography

Great Barrier Reef Marine Park, Australia.