Amino acid racemization (AAR) dating provides a geochronological framework for eolianite deposits on Lord Howe Island, ranging from the Holocene to the Middle Pleistocene. The dataset defines three aminozones based on racemization extents in land snails and whole-rock samples, correlating disparate successions and linking dune deposition to periods of high sea level. Data reliability is assessed through multiple samples per unit and consistency checks across seven amino acids.
Use Cases
- Correlating disparate stratigraphic successions based on amino acid racemization (AAR) data.
- Assessing the reliability of AAR dating by analyzing multiple samples from individual lithostratigraphic units.
- Defining geochronological aminozones based on racemization extents in Placostylus land snails and whole-rock eolianite samples.
- Linking large dune unit deposition to periods of relatively high sea level as indicated by the AAR data.
Strengths
- Reliability is assessed by analyzing multiple samples from individual lithostratigraphic units.
- Data consistency is checked across a suite of seven amino acids.
- Three distinct aminozones (A, B, C) are defined with specific D/L ratio ranges provided.
- Findings are supported by independent lithostratigraphic interpretations and U/Th ages.
Limitations
- Column-level documentation is absent; field semantics must be inferred after download.
- Row count is unknown, which may limit suitability assessment.
- Description metadata is limited; actual data quality requires manual inspection after download.
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 2026-06-27 21:25:47.170715; freshness should be verified.
- Geography
- Lord Howe Island, Southwest Pacific Ocean