Lord Howe Island Eolianite Amino Acid Racemization Dating Data

Geoscience Australia Data provides amino acid racemization (AAR) dating results for eolianite on Lord Howe Island, establishing a geochronological framework from the Holocene to the Middle Pleistocene. The dataset defines three aminozones based on racemization extents in land snails and whole-rock samples, correlating with specific lithostratigraphic formations. Data was last updated on 2026-03-25.

Use Cases

• Correlating disparate stratigraphic successions based on amino acid D/L ratios.
• Assessing the reliability of AAR dating by checking stratigraphic order and consistency across seven amino acids.
• Linking large dune unit deposition to periods of high sea level based on extended eolianite deposition timelines.

Strengths

• Reliability assessed by analyzing multiple samples from individual lithostratigraphic units.
• Defines three distinct aminozones (A, B, C) with specific mean D/L-leucine ratios provided for each.
• Data is in broad agreement with independent U/Th and TL age measurements from the same formations.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment for large-scale statistical modeling.

Provenance

Source

Geoscience Australia Data

Collection Method

Amino acid racemization (AAR) dating of land snail (Placostylus bivaricosus) and whole-rock eolianite samples.

Time Range

Holocene to Middle Pleistocene.

Freshness

Last updated 2026-03-25 17:00:54.101321; freshness should be verified.

Geography

Lord Howe Island, Southwest Pacific Ocean.