Life and death of Holocene reefs of Moreton Bay, Queensland, Australia

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dc.contributor.authorNothdurft, LDen_AU
dc.contributor.authorMajor, Jen_AU
dc.contributor.authorLeondard, NDen_AU
dc.contributor.authorZhao, JXen_AU
dc.contributor.authorPrice, GJen_AU
dc.contributor.authorWelsh, KJen_AU
dc.contributor.authorWebb, GEen_AU
dc.contributor.authorHua, Qen_AU
dc.date.accessioned2024-03-01T04:31:28Zen_AU
dc.date.available2024-03-01T04:31:28Zen_AU
dc.date.issued2012-08-05en_AU
dc.date.statistics2022-01-31en_AU
dc.description.abstractDead fringing coral reefs of Moreton Bay are the southernmost fringing reefs in eastern Australia and are significant examples of marginal environments for subtropical reef growth. Two sites were investigated in the western part of the bay at Wellington Point and Cleveland Point. Seven auger cores and 5 surface transects were made across the dead reef flats to record spatial data on coral distribution and elevation and to provide samples for dating to test the timing and potential causes of reef termination. A total of 78 coral samples were dated using 230Th/U and 14C techniques. 230Th dates were determined by TIMS U-series, and MC-ICP-MS and 14C dates by AMS. Dates of framework corals indicate that reef growth initiated at different elevations by ∼7000 ybp and was predominantly vertical with little or no lateral progradation. Reef growth was continuous until termination at ∼5800 ybp. Micro-atolls (6523, 6680 ybp) suggest a sea level of ∼+1.3m above current lowest astronomical tides and elevated sea level persisted through that interval. Small incipient coral colonies on the dead reef surface range in ages between ∼4850 and 4700 ybp suggesting conditions were again suitable at that time for a recolonisation of the reef flat, but reef growth was not reinitiated. No younger ages were recorded. Temporal changes in Moreton Bay conditions have resulted in periodic phase shifts between favourable and unfavourable conditions for reef growth, coincident with a small sea level fall ∼5800 ybp and including potentially cooler temperatures and decreased water quality within the bay.en_AU
dc.identifier.citationNothdurft, L., Major, J., Leonard, N., Zhao. J.-x., price, G., Welsh, K., Webb. G., & Hua, Q. (2012). Life and death of Holocene reefs of Moreton Bay, Queensland, Australia. Paper presented to the 34th International Geological Congress 2012, "Unearthing our Past and Future - Resourcing Tomorrow". 5-10 August 2012 . Brisbane, Australia. (pp. 1686).en_AU
dc.identifier.conferenceenddate2012-08-10en_AU
dc.identifier.conferencename34th International Geological Congress 2012, "Unearthing our Past and Future - Resourcing Tomorrow"en_AU
dc.identifier.conferenceplaceBrisbane, Australiaen_AU
dc.identifier.conferencestartdate2012-08-05en_AU
dc.identifier.otherGC1261290en_AU
dc.identifier.urihttps://apo.ansto.gov.au/handle/10238/15527en_AU
dc.language.isoenen_AU
dc.publisherAustralian Geosciences Councilen_AU
dc.subjectQuaternary perioden_AU
dc.subjectQueenslanden_AU
dc.subjectAustraliaen_AU
dc.subjectCoral reefsen_AU
dc.subjectEnvironmenten_AU
dc.subjectGrowthen_AU
dc.subjectTemperature zonesen_AU
dc.subjectWater qualityen_AU
dc.titleLife and death of Holocene reefs of Moreton Bay, Queensland, Australiaen_AU
dc.typeConference Abstracten_AU
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