Amino Acid Racemization Data for Eolianite Dating on Lord Howe Island

Amino acid racemization (AAR) dating data correlates eolianite successions on Lord Howe Island, providing a geochronological framework from the Holocene to Middle Pleistocene. The dataset includes D/L ratios for seven amino acids from land snail (Placostylus bivaricosus) and whole-rock samples, defining three aminozones. Data from the Australian Ocean Data Network supports independent lithostratigraphic interpretations and links dune deposition to high sea-level periods.

Use Cases

• Correlating disparate eolianite successions based on amino acid racemization data.
• Assessing the reliability of AAR dating by analyzing multiple samples from lithostratigraphic units.
• Linking large dune unit deposition to periods of relatively high sea level based on the described chronology.
• Comparing AAR-derived ages with independent U/Th and TL ages mentioned in the description.

Strengths

• Reliability is assessed by analyzing multiple samples from individual units and checking stratigraphic order of D/L ratios.
• Defines three distinct aminozones (A, B, C) with specific mean D/L-leucine ratios and associated geological formations.
• Data shows broad agreement with independent U/Th ages of speleothems and corals, and TL ages of dune units.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.
• Freshness should be verified as the last update timestamp is 2026-06-16 21:38:05.670193.

Provenance

Source

Australian Ocean Data Network

Collection Method

Amino acid racemization (AAR) dating of eolianite and land snail samples.

Time Range

Holocene to Middle Pleistocene

Freshness

Last updated 2026-06-16 21:38:05.670193

Geography

Lord Howe Island, Southwest Pacific Ocean