MARS Database: Seafloor Sediment Samples and Maps for Australia

25,000 sediment samples with 138,000 recorded properties form the core of the MARS database. This national-scale project, a collaboration between the National Oceans Office and Geoscience Australia, provides validated quantitative data on grain size, carbonate content, and sediment classification for the Australian Marine Jurisdiction. It produced maps for the Northern Planning Area and modeled sediment mobility in waters less than 300 meters deep.

Use Cases

• Mapping sediment distribution (e.g., gravel, sand, mud percentages) for benthic habitat studies.
• Modeling sediment mobility and energy regimes in shallow waters (<300m depth) for engineering assessments.
• Classifying seafloor types using the Folk scheme for geological and ecological regionalisation.
• Analyzing carbonate content data for biogeochemical and climate change research.

Strengths

• Contains a substantial, directly stated volume of data: approximately 25,000 samples and 138,000 properties.
• Represents the first national-scale critical assessment of Australia's seafloor sediment data quality and coverage.
• Includes derived analytical products like maps of sediment properties, tide/wave exceedance, and energy regime regionalisation.

Limitations

• Column names and specific data structure are not provided in the available metadata.
• The reported 'last updated' date of 2026-04-16 is in the future, indicating a potential metadata error.
• Spatial coverage excludes external territories of the Australian Marine Jurisdiction.

Provenance

Source

Collaborative project between the National Oceans Office and Geoscience Australia.

Collection Method

Identification and collation of existing marine sediment data, followed by database population, validation, and analysis.

Time Range

null

Freshness

Last updated metadata indicates 2026-04 16, which is inconsistent.

Geography

Australian Marine Jurisdiction, with specific mapping for the Northern Planning Area and the whole jurisdiction (excluding external territories).