Quaternary Aminostratigraphy of Eolianite on Lord Howe Island, Southwest Pacific Ocean

Amino acid racemization (AAR) dating data from the Australian Ocean Data Network provides a geochronological framework for eolianite deposits on Lord Howe Island. The dataset includes D/L ratios for seven amino acids from land snail and whole-rock samples, defining three aminozones correlated to Oxygen Isotope Stages. These data, last updated in 2026, support lithostratigraphic interpretations and indicate eolianite deposition over a longer time interval than previously known.

Use Cases

• Correlating disparate eolianite successions based on amino acid racemization extents.
• Assessing the reliability of AAR dating by checking stratigraphic order and consistency of D/L ratios.
• Linking large dune unit deposition to periods of relatively high sea level based on the AAR chronology.
• Comparing AAR-derived ages with independent U/Th ages of speleothems and corals mentioned in the description.

Strengths

• Reliability is assessed by analyzing multiple samples from individual lithostratigraphic units.
• Defines three distinct aminozones (A, B, C) with specific mean D/L-leucine ratios, such as 0.03±0.01 for modern samples.
• Data shows broad agreement with independent U/Th ages from speleothems and corals, supporting its validity.

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 analysis.

Provenance

Source

Australian Ocean Data Network via data_gov_au

Collection Method

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

Time Range

Holocene to Middle Pleistocene, linked to Oxygen Isotope Stages including OIS 5 and OIS 7.

Freshness

Last updated 2026-06-23 01:06:03.043039; freshness should be verified.

Geography

Lord Howe Island, Southwest Pacific Ocean.