Amino Acid Racemization Data for Eolianite on Lord Howe Island

Amino acid racemization (AAR) dating data for eolianite on Lord Howe Island, providing a geochronological framework from the Holocene to Middle Pleistocene. The dataset, sourced from the Australian Ocean Data Network, assesses reliability by analyzing multiple samples from lithostratigraphic units and defines three aminozones based on racemization in land snails and whole-rock samples. These data support independent lithostratigraphic interpretations and indicate eolianite deposition over a longer time interval than previously known.

Use Cases

• Correlating disparate sedimentary successions based on amino acid racemization (AAR) data.
• Establishing a geochronological framework for eolianite deposits using D/L ratios from land snails and whole-rock samples.
• Linking large dune unit deposition to periods of high sea level based on the extended depositional timeline revealed by the AAR data.

Strengths

• Reliability is assessed by analyzing multiple samples from individual lithostratigraphic units and checking stratigraphic order.
• Defines three distinct aminozones (A, B, C) with specific mean D/L-leucine ratios provided for each.
• 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.
• 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 (Placostylus bivaricosus) samples.

Time Range

Holocene to Middle Pleistocene

Freshness

Last updated 2026-06-05 06:12:32.513385; freshness should be verified.

Geography

Lord Howe Island, Southwest Pacific Ocean