Seven beach ridges at Beachmere, Australia, record shoreline accretion and relative sea-level changes over the last 1,700 years. Optical dating reveals a period around 1,700 years ago when sea level was approximately 1 meter higher than present, followed by progradation rates that increased from ~0.16 to ~0.40 meters per year. This dataset, provided by Geoscience Australia, captures a rapid phase of shoreline accretion likely linked to increased sediment supply after European settlement.
Use Cases
- Modeling historical shoreline progradation rates based on optically dated beach ridge sequences.
- Analyzing changes in relative sea level over the last two millennia based on ridge morphology and chronostratigraphy.
- Investigating the impact of anthropogenic sediment supply on coastal accretion based on the rapid formation of ridges 3 to 1.
Strengths
- Covers a specific 1,700-year temporal record of coastal change.
- Provides quantified progradation rates (e.g., ~0.16 to ~0.40 m yr-1) with associated age uncertainties.
- Documents a clear geomorphological shift marked by a ~200-meter-wide intertidal flat between ridges.
Limitations
- Column-level documentation is absent; field semantics must be inferred after download.
- Row count is unknown, which may limit suitability assessment.
- Data may reflect geographic bias inherent to a single site in southeastern Queensland.
Provenance
- Source
- Geoscience Australia Data
- Collection Method
- Optical dating of pebbly sand beds within beach ridges.
- Time Range
- Last 1,700 years
- Freshness
- Last updated 2026-04-20 02:47:31.517930; freshness should be verified.
- Geography
- Beachmere, southeastern Queensland, Australia