Mid-Holocene sea-level and coral reef demise: U-Th dating of subfossil corals in Moreton Bay, Australia

Leonard, Nicole D., Welsh, Kevin J., Zhao, Jian-xin, Nothdurft, Luke D., Webb, Gregory E., Major, Josef, Feng, Yuexing and Price, Gilbert J. (2013) Mid-Holocene sea-level and coral reef demise: U-Th dating of subfossil corals in Moreton Bay, Australia. Holocene, 23 12: 1841-1852. doi:10.1177/0959683613508156

Author Leonard, Nicole D.
Welsh, Kevin J.
Zhao, Jian-xin
Nothdurft, Luke D.
Webb, Gregory E.
Major, Josef
Feng, Yuexing
Price, Gilbert J.
Title Mid-Holocene sea-level and coral reef demise: U-Th dating of subfossil corals in Moreton Bay, Australia
Journal name Holocene   Check publisher's open access policy
ISSN 0959-6836
Publication date 2013-01-01
Year available 2013
Sub-type Article (original research)
DOI 10.1177/0959683613508156
Open Access Status Not yet assessed
Volume 23
Issue 12
Start page 1841
End page 1852
Total pages 12
Place of publication London, United Kingdom
Publisher Sage Publications Ltd.
Language eng
Subject 1904 Performing Arts and Creative Writing
2306 Global and Planetary Change
2303 Ecology
1911 Palaeontology
1204 Engineering Design
Abstract It is increasingly apparent that sea-level data (e.g. microfossil transfer functions, dated coral microatolls and direct observations from satellite and tidal gauges) vary temporally and spatially at regional to local scales, thus limiting our ability to model future sea-level rise for many regions. Understanding sea-level response at 'far-field' locations at regional scales is fundamental for formulating more relevant sea-level rise susceptibility models within these regions under future global change projections. Fossil corals and reefs in particular are valuable tools for reconstructing past sea levels and possible environmental phase shifts beyond the temporal constraints of instrumental records. This study used abundant surface geochronological data based on in situ subfossil corals and precise elevation surveys to determine previous sea level in Moreton Bay, eastern Australia, a far-field site. A total of 64 U-Th dates show that relative sea level was at least 1.1 m above modern lowest astronomical tide (LAT) from at least ~6600 cal. yr BP. Furthermore, a rapid synchronous demise in coral reef growth occurred in Moreton Bay ~5800 cal. yr BP, coinciding with reported reef hiatus periods in other areas around the Indo-Pacific region. Evaluating past reef growth patterns and phases allows for a better interpretation of anthropogenic forcing versus natural environmental/climatic cycles that effect reef formation and demise at all scales and may allow better prediction of reef response to future global change.
Keyword Australia
Fossil coral
Mid Holocene
Moreton Bay
Reef demise
Sea Level
Q-Index Code C1
Q-Index Status Confirmed Code
Grant ID DP1096184
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Earth Sciences Publications
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