Sea level change over the past 2500 years from northeastern Australia

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dc.contributor.authorLewis, SEen_AU
dc.contributor.authorWust, RAJen_AU
dc.contributor.authorWebster, JMen_AU
dc.contributor.authorCollins, Jen_AU
dc.contributor.authorWright, SAen_AU
dc.contributor.authorJacobsen, GEen_AU
dc.date.accessioned2023-01-27T01:41:51Zen_AU
dc.date.available2023-01-27T01:41:51Zen_AU
dc.date.issued2012-08-05en_AU
dc.date.statistics2022-01-28en_AU
dc.description.abstractThis study C-14 dated living and fossil oyster bed deposits (>50 cm thick) to examine when sea level fell to its present position. These thick oyster bed deposits are formed in the inter-tidal zone and are relatively long-lived features with one bed dated in this study growing for ∼1000 years. Consistent growth rates at each sampling location indicated that oyster bed accumulation over time has been continuous, although growth rates varied markedly between locations from 0.30 mm/year to 6.4 mm/year suggesting the influence of localised environmental variability in water circulation, wave exposure and boulder lithology. We will show that a rapid sea-level fall occurred between 800 and 1200 years BP where sea level fell from ∼ + 1 m to present position with rates up to 7 mm/year but no less than 2.5 mm/year. The rapid fall supports the stepped sea-level model. This rapid fall influenced the movements of indigenous people as well as coincided with the development of inshore fringing coral reefs and geomorphological changes along the coastal zone.en_AU
dc.identifier.citationLewis, S., Wust, R. A. J., Webster, J. M., Collins, J., Wright, S., & Jacobsen, G. (2012). Sea level change over the past 2500 years from northeastern Australia. Paper presented to the 34th International Geological Congress 2012, "Unearthing our Past and Future - Resourcing Tomorrow", Brisbane, Australia, 5-10 August 2012, (pp. 707).en_AU
dc.identifier.conferenceenddate10 August 2012en_AU
dc.identifier.conferencename34th International Geological Congress 2012, 'Unearthing our Past and Future - Resourcing Tomorrow'en_AU
dc.identifier.conferenceplaceBrisbane, Australiaen_AU
dc.identifier.conferencestartdate5 August 2012en_AU
dc.identifier.otherGC126033en_AU
dc.identifier.pagination707en_AU
dc.identifier.urihttps://apo.ansto.gov.au/dspace/handle/10238/14554en_AU
dc.language.isoenen_AU
dc.publisherAustralian Geosciences Councilen_AU
dc.subjectCarbon 14en_AU
dc.subjectSea levelen_AU
dc.subjectAustraliaen_AU
dc.subjectFossilsen_AU
dc.subjectOystersen_AU
dc.subjectCoastal regionsen_AU
dc.subjectLithologyen_AU
dc.subjectCoralsen_AU
dc.subjectGeomorphologyen_AU
dc.titleSea level change over the past 2500 years from northeastern Australiaen_AU
dc.typeConference Abstracten_AU
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