Quaternary and Modern Marine Environments of the Van Diemen Rise, Timor Sea

Environmental baseline data for the Van Diemen Rise on the Sahul Shelf, focusing on Quaternary evolution and modern geological processes. The dataset, from the Australian Ocean Data Network, describes sea bottom sediments, channel features, and reef growth patterns related to sea-level changes since approximately 18,000 BP. It was last updated on 2026-04-10.

Use Cases

• Modeling Quaternary sea-level change impacts on continental shelf morphology based on described terraces and banks.
• Analyzing modern sediment distribution patterns based on described calcareous sands, foraminiferal calcarenites, and silty clays.
• Assessing potential short-term environmental impacts of seismic surveying and drilling activities described for the region.
• Studying coral reef growth history and shifts based on described Holocene transgression and reef focus areas.

Strengths

• Provides specific environmental context for a defined geographic area: the Van Diemen Rise in the eastern Timor Sea.
• Describes a clear temporal sequence from the last glacial maximum (~18,000 BP) through the Holocene transgression to modern conditions.
• Includes detailed observations of sediment types (e.g., calcareous sand, foraminiferal calcarenites, silty clays) and biological assemblages (e.g., Halimeda, large foraminifera).

Limitations

• Data format is PDF/HTML; column-level documentation and sample data are unavailable, requiring manual extraction and interpretation.
• Row count and dataset size are unknown, which may limit suitability assessment for quantitative analysis.
• Freshness should be verified despite the 2026 update date, as the core scientific observations may be from earlier studies.

Provenance

Source

Australian Ocean Data Network

Collection Method

Environmental baseline data collection and interpretation for offshore areas.

Time Range

Quaternary period to present, with specific reference to ~18,000 BP.

Freshness

Last updated 2026-04-10 19:44:45.775622

Geography

Van Diemen Rise, Sahul Shelf, eastern Timor Sea, Australia.