Evolution of Australia's Passive Continental Margins Through Seafloor Spreading

A geological analysis details the evolution of Australia's passive continental margins through five separate seafloor-spreading episodes spanning 155 million years. The document, sourced from the Australian Ocean Data Network, examines rift-phase and postbreakup subsidence mechanisms and sedimentation patterns. The record was last updated in April 2026.

Use Cases

• Model postbreakup subsidence rates using data on exponential decay of sedimentation over time.
• Correlate rift-phase duration with specific seafloor-spreading episodes documented from 155 to 55 million years ago.
• Analyze the relationship between submarine erosion events and the timing of breakup unconformities.
• Study the transition to prograding marine shelf conditions using the 20-40 million year postbreakup timeframe.
• Compare crustal structure predictions against observations of thin continental crust near continent-ocean boundaries.

Strengths

• Analysis covers five distinct seafloor-spreading episodes over a 155 million year timeframe.
• Examines multiple geological processes including rift-graben evolution, thermal contraction, and metamorphic subsidence.

Limitations

• Data is presented in narrative PDF/HTML format, not as structured, machine-readable tables.
• Specific quantitative measurements, row counts, or sample data are unavailable.
• Theoretical models are discussed, but underlying raw observational or measurement datasets are not provided.

Provenance

Source

Australian Ocean Data Network

Collection Method

null

Time Range

Covers geological events from 155 million years ago to the present.

Freshness

Record was last updated in April 2026.

Geography

Focuses on the passive continental margins surrounding Australia.