Holocene coastal paleo-environments of Western Victoria

Matthews, Conna 2019, Holocene coastal paleo-environments of Western Victoria, B.Science (Hons) thesis, School of Life and Environmental Sciences, Deakin University.

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Title Holocene coastal paleo-environments of Western Victoria
Author Matthews, Conna
Institution Deakin University
School School of Life and Environmental Sciences
Faculty Faculty of Science, Engineering and Built Environment
Degree type Honours
Degree name B.Science (Hons)
Thesis advisor Warne, MarkORCID iD for Warne, Mark orcid.org/0000-0001-5456-191X
Date submitted 2019-11-08
Keyword(s) foraminifera
ostracoda
holocene
palaeoenvironments
stratigraphy
Summary Microfossils for mid to late Holocene sediments present within the Kelly’s Swamp wetlands have been used to infer temporal landscape change. The abundance of freshwater ostracods and coastal foraminifera within a perched peat sample dated to have formed approximately 1,875 years BP, suggest the Kelly’s Swamp wetlands was once a freshwater coastal lagoon. The microfossils collected from younger sediments, dated to approximately 1,800 to 1,600 years ago, indicate that there was a shift into a swampier and more brackish aquatic environment. The youngest surface (soil) sediment layer in this region reflects drainage works since European settlement, which transformed these wetlands into pasture for agricultural purposes. The dominance of the benthic foraminifera, Ammonia beccarii within all the sediment samples, alongside the general low abundance of ostracod microfossils suggests that pre-European settlement swamp environments in this region experienced dominantly dysoxic (low oxygen) aquatic conditions.
Language eng
Indigenous content off
Field of Research 0403 Geology
Description of original 45 p.
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Persistent URL http://hdl.handle.net/10536/DRO/DU:30133323

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