Holocene record of Tuggerah Lake estuary development on the Australian east coast: Sedimentary responses to sea-level fluctuations and climate variability

Macreadie, PI; Rolph, TC; Schröder-Adams, C; Boyd, R; Skilbeck, CG

Holocene record of Tuggerah Lake estuary development on the Australian east coast: Sedimentary responses to sea-level fluctuations and climate variability

Macreadie, PI

Rolph, TC Schröder-Adams, C Boyd, R Skilbeck, CG

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Publication Type:: Journal Article
Citation:: GeoResJ, 2015, 5 pp. 57 - 73
Issue Date:: 2015-03-01

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Field	Value	Language
dc.contributor.author	Macreadie, PI https://orcid.org/0000-0001-7362-0882	en_US
dc.contributor.author	Rolph, TC	en_US
dc.contributor.author	Schröder-Adams, C	en_US
dc.contributor.author	Boyd, R	en_US
dc.contributor.author	Skilbeck, CG https://orcid.org/0000-0003-1634-963X	en_US
dc.date.issued	2015-03-01	en_US
dc.identifier.citation	GeoResJ, 2015, 5 pp. 57 - 73	en_US
dc.identifier.issn	2214-2428	en_US
dc.identifier.uri	http://hdl.handle.net/10453/36195
dc.description.abstract	© 2015 The Authors. We investigated the Holocene palaeo-environmental record of the Tuggerah Lake barrier estuary on the south-east coast of Australia to determine the influence of local, regional and global environmental changes on estuary development. Using multi-proxy approaches, we identified significant down-core variation in sediment cores relating to sea-level rise and regional climate change. Following erosion of the antecedent land surface during the post-glacial marine transgression, sediment began to accumulate at the more seaward location at ~8500. years before present, some 1500. years prior to barrier emplacement and ~4000. years earlier than at the landward site. The delay in sediment accumulation at the landward site was a consequence of exposure to wave action prior to barrier emplacement, and due to high river flows of the mid-Holocene post-barrier emplacement. As a consequence of the mid-Holocene reduction in river flows, coupled with a moderate decline in sea-level, the lake experienced major changes in conditions at ~4000. years before present. The entrance channel connecting the lake with the ocean became periodically constricted, producing cyclic alternation between intervals of fluvial- and marine-dominated conditions. Overall, this study provides a detailed, multi-proxy investigation of the physical evolution of Tuggerah Lake with causative environmental processes that have influenced development of the estuary.	en_US
dc.relation.ispartof	GeoResJ	en_US
dc.relation.isbasedon	10.1016/j.grj.2015.01.002	en_US
dc.title	Holocene record of Tuggerah Lake estuary development on the Australian east coast: Sedimentary responses to sea-level fluctuations and climate variability	en_US
dc.type	Journal Article
utslib.citation.volume	5	en_US
utslib.for	0406 Physical Geography and Environmental Geoscience	en_US
pubs.embargo.period	Not known	en_US
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/DVC (Research)
pubs.organisational-group	/University of Technology Sydney/Faculty of Science
utslib.copyright.status	closed_access
pubs.publication-status	Published	en_US
pubs.volume	5	en_US

Abstract:

© 2015 The Authors. We investigated the Holocene palaeo-environmental record of the Tuggerah Lake barrier estuary on the south-east coast of Australia to determine the influence of local, regional and global environmental changes on estuary development. Using multi-proxy approaches, we identified significant down-core variation in sediment cores relating to sea-level rise and regional climate change. Following erosion of the antecedent land surface during the post-glacial marine transgression, sediment began to accumulate at the more seaward location at ~8500. years before present, some 1500. years prior to barrier emplacement and ~4000. years earlier than at the landward site. The delay in sediment accumulation at the landward site was a consequence of exposure to wave action prior to barrier emplacement, and due to high river flows of the mid-Holocene post-barrier emplacement. As a consequence of the mid-Holocene reduction in river flows, coupled with a moderate decline in sea-level, the lake experienced major changes in conditions at ~4000. years before present. The entrance channel connecting the lake with the ocean became periodically constricted, producing cyclic alternation between intervals of fluvial- and marine-dominated conditions. Overall, this study provides a detailed, multi-proxy investigation of the physical evolution of Tuggerah Lake with causative environmental processes that have influenced development of the estuary.

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http://hdl.handle.net/10453/36195