Seabed Sediment Composition Raster Grids for the Petrel Sub-Basin

Spatially continuous raster grids at 0.0025 decimal degree resolution detail the weight percentage of seabed gravel, mud, and sand in the Petrel sub-basin. The dataset supersedes previous predictions with improved accuracy, though artifacts occur in regions with insufficient sample density. It is intended for basin-scale analysis of sediment distribution.

Use Cases

• Analyze spatial patterns of seabed gravel, mud, and sand content to model sediment transport dynamics.
• Validate or improve seabed habitat models using the sediment fraction percentages as environmental covariates.
• Assess the accuracy of sediment predictions in areas of varying seabed complexity and underlying data density.
• Integrate the 0.0025 dd resolution raster grids with bathymetric data for geological mapping of the basin.

Strengths

• Provides three continuous sediment fraction variables (gravel, mud, sand) as weight percentages.
• High spatial resolution of 0.0025 decimal degrees for detailed basin-scale analysis.
• Supersedes previous predictions with demonstrated improvements in accuracy.

Limitations

• Contains artifacts in regions where sample density was insufficient to detect local sediment variation.
• Accuracy of predictions varies based on underlying data density and seabed complexity.
• Dataset is intended for basin scale and may not be appropriate for use at smaller scales.

Provenance

Source

Geoscience Australia Data

Collection Method

Predicted sediment content presented in raster grids and ASCII text format, superseding previous interpolations.

Time Range

null

Freshness

Last updated in March 2026.

Geography

Petrel sub-basin within the Australian continental Exclusive Economic Zone (EEZ).