Northwest Marine Region Sediment Composition and Seafloor Mapping

Sedimentology data for Australia's Northwest Marine Region provides consistent quantitative point assays of grainsize and carbonate content. The analysis is based on the MARS database as of August 2007, compiled by the Australian Ocean Data Network. This resource combines a literature review with spatial analysis of seafloor geomorphology and sediment characteristics.

Use Cases

• Map seafloor geomorphology types using spatial analysis layers.
• Analyze sediment composition trends from point assays of weight percent sand, mud, and gravel.
• Model carbonate content distribution across the region using weight percent carbonate data.
• Correlate sediment grainsize data with geomorphic features identified in the spatial analysis.

Strengths

• Data provides consistent quantitative assays for key sediment metrics like grainsize and carbonate.
• Analysis covers the defined Northwest Marine Region boundary as established by a government department in 2007.

Limitations

• Core sediment data is from 2007, which may not reflect current conditions.
• Unknown sample size (row count) for the point assay data limits statistical assessment.

Provenance

Source

Australian Ocean Data Network, utilizing the MARS database.

Collection Method

Literature review and spatial analysis of existing quantitative point assays.

Time Range

Data snapshot as of August 1, 2007.

Freshness

Data reflects the MARS database state from August 2007, though metadata was updated in April 2026.

Geography

Northwest Marine Region of Australia, as defined by the Department of the Environment, Water, Heritage and the Arts in 2007.