Amino acid racemization (AAR) data from land snails and whole-rock samples provides a geochronological framework for eolianite on Lord Howe Island ranging from Holocene to Middle Pleistocene. The dataset defines three aminozones based on D/L ratios for seven amino acids and correlates disparate stratigraphic successions. Data is hosted by the Australian Ocean Data Network and was last updated in April 2026.
Use Cases
- Correlating disparate stratigraphic successions based on amino acid racemization data.
- Establishing a geochronological framework for eolianite deposition based on D/L ratios.
- Investigating links between dune unit deposition and periods of high sea level based on the extended time interval revealed by AAR.
- Cross-checking lithostratigraphic interpretations with independent U/Th and TL age data mentioned in the description.
Strengths
- Reliability is assessed by analyzing multiple samples from individual lithostratigraphic units.
- Data includes D/L ratios for a suite of seven amino acids, providing a multi-parameter check.
- The stratigraphic order of D/L ratios and consistency of racemization extents are checked.
- Data supports independent lithostratigraphic interpretations and agrees with U/Th and TL ages.
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; the last update timestamp is April 2026.
Provenance
- Source
- Australian Ocean Data Network
- Collection Method
- Amino acid racemization (AAR) dating of eolianite samples and land snails.
- Time Range
- Holocene to Middle Pleistocene
- Freshness
- Last updated 2026-04-16 14:29:23.469520
- Geography
- Lord Howe Island, Southwest Pacific Ocean