Holocene sea-level change and coastal landscape evolution in the southern Gulf of Carpentaria, Australia

Sloss, Craig R., Nothdurft, Luke, Hua, Quan, O'Connor, Shoshannah G., Moss, Patrick T., Rosendahl, Daniel, Petherick, Lynda M., Nanson, Rachel A., Mackenzie, Lydia L., Sternes, Alison, Jacobsen, Geraldine E., and Ulm, Sean (2018) Holocene sea-level change and coastal landscape evolution in the southern Gulf of Carpentaria, Australia. Holocene, 28 (9). pp. 1411-1430.

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A revised Holocene sea-level history for the southern Gulf of Carpentaria is presented based on new data from the South Wellesley Archipelago and age recalibration of previous research. Results confirm that rising sea levels during the most recent post-glacial marine transgression breached the Arafura Sill ca. 11,700 cal. yr BP. Sea levels continued to rise to ca. –30 m by 10,000 cal. yr BP, leading to full marine conditions. By 7700 cal. yr BP, sea-level reached present mean sea-level (PMSL) and continued to rise to an elevation of between 1.5 m and 2 m above PMSL. Sea level remained ca. + 1.5 between 7000 and 4000 cal. yr BP, followed by rapid regression to within ± 0.5 m of PMSL by ca. 3500 cal. yr BP. When placed into a wider regional context results from this study show that coastal landscape evolution in the tropical north of Australia was not only dependent on sea-level change but also show a direct correlation with Holocene climate variability. Specifically, the formation and preservation of beach-rock deposits, intertidal successions, beach and chenier ridge systems hold valuable sea-level and Holocene climate proxies that can contribute to the growing research into lower latitude Holocene sea-level and climate histories.

Item ID: 54335
Item Type: Article (Research - C1)
ISSN: 1477-0911
Keywords: Australia; beach ridge; beach-rock; chenier; coastal; Holocene; sea-level
Copyright Information: Copyright © The Author(s) 2018
Funders: Australian Research Council, Australian Institute of Nuclear Sciences and Engineering (AINSE)
Projects and Grants: ARC project number DP120103179, ARC project number DP0663047, ARC future fellowship FT120100656, AINSE ALNGRA13017, AISNE ALNGRA15513
Date Deposited: 28 Jun 2018 00:48
FoR Codes: 37 EARTH SCIENCES > 3709 Physical geography and environmental geoscience > 370905 Quaternary environments @ 100%
SEO Codes: 96 ENVIRONMENT > 9603 Climate and Climate Change > 960307 Effects of Climate Change and Variability on Australia (excl. Social Impacts) @ 100%
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