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New Quartz SAR-OSL Ages from the Stranded Beach Dune Sequence in South-east South Australia

Created 17/10/2025

Updated 17/10/2025

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A sequence of stranded coastal barriers in south-east South Australia preserves a record of sea-level variations over the past 800 ka. Huntley et al. (Quat. Sci. Rev. 12 (1993a) 1; Quat. Sci. Rev. 13 (1994a) 201) attempted to test thermoluminescence (TL) dating methods and found good agreement between quartz TL ages with independent ages for these dunes. We investigate the accuracy of the single-aliquot regenerative-dose (SAR) procedure (Radiat. Meas. 32 (2000) 57) over an extended age range of 0-250 ka, by comparing SAR-OSL ages determined on quartz extracts from these dunes with the existing chronology. We show that Robe II range is 60 ka, and that Robe III is 100 ka old. Not surprisingly, the OSL ages increase monotonically from the Robe II range to the West Naracoorte range. For the younger dunes (<240 ka), the SAR-OSL ages agree with the expected ages within 1 errors, whereas for the older dunes the SAR ages are consistent with independent ages within 2 error limits. We consider these results to be very promising, and lend support to the large number of quartz SAR-OSL ages being presented in the literature, where such comparisons with independent chronology are not usually possible.

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Field Value
Title New Quartz SAR-OSL Ages from the Stranded Beach Dune Sequence in South-east South Australia
Language eng
Licence Not Specified
Landing Page https://data.gov.au/data/dataset/7a3f59a9-a560-453e-845d-42beaffec5c4
Contact Point
Geoscience Australia Data
clientservices@ga.gov.au
Reference Period 22/04/2018
Geospatial Coverage
Map data © OpenStreetMap contributors
{
  "coordinates": [
    [
      [
        139.5,
        -38.5
      ],
      [
        142.0,
        -38.5
      ],
      [
        142.0,
        -35.03
      ],
      [
        139.5,
        -35.03
      ],
      [
        139.5,
        -38.5
      ]
    ]
  ],
  "type": "Polygon"
}
Data Portal Geoscience Australia

Data Source

This dataset was originally found on Geoscience Australia "New Quartz SAR-OSL Ages from the Stranded Beach Dune Sequence in South-east South Australia". Please visit the source to access the original metadata of the dataset:
https://ecat.ga.gov.au/geonetwork/srv/eng/csw/dataset/new-quartz-sar-osl-ages-from-the-stranded-beach-dune-sequence-in-south-east-south-australia