Shoreline Progradation Rates from Beachmere Beach Ridges Over 1,700 Years

1,700 years of shoreline change is recorded through the morphology and chronostratigraphy of seven beach ridges at Beachmere, southeastern Queensland, Australia. The dataset, provided by the Australian Ocean Data Network, contains optical ages and derived progradation rates for these ridges. It was last updated in April 2026.

Use Cases

• Model shoreline progradation rate changes over time using optical ages for ridges 7 through 1.
• Analyze the relationship between sediment supply and ridge spacing by comparing the wide intertidal flat between ridges 4 and 3 to other ridge intervals.
• Correlate phases of rapid shoreline accretion, such as for ridges 3 to 1, with historical events like European settlement.
• Establish a maximum age for modern coastal erosion at the site using the optical age of ridge 1 (140 ± 50 years).
• Reconstruct relative sea-level history by comparing the 1-meter higher sea level indicated by ridge 7 to present conditions.

Strengths

• Covers a 1,700-year temporal record of coastal change.
• Provides optical ages with associated 1σ uncertainty ranges for seven distinct beach ridges.
• Includes calculated shoreline progradation rates, such as ~0.16 m/yr and ~0.40 m/yr, for specific periods.

Limitations

• Sample size is limited to seven primary beach ridge observations.
• Specific row count, column names, and underlying sample data are unavailable.
• Geographic scope is restricted to a single site at Beachmere, Queensland.

Provenance

Source

Australian Ocean Data Network

Collection Method

Optical dating of pebbly sand beds within beach ridges and chronostratigraphic analysis.

Time Range

Last 1,700 years

Freshness

Last updated in April 2026.

Geography

Beachmere, southeastern Queensland, Australia