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179. Rhyll Swamp

This information has been developed from one or more of these publications:

  • Sites of Geological and Geomorphological Significance in the Westernport Bay Catchment (1984) by Neville Rosengren.
  • Sites of Geological and Geomorphological Significance in the Western Region of Melbourne (1986) by Neville Rosengren
  • Sites of Geological and Geomorphological Significance on the Coast of Port Phillip Bay (1988) by Neville Rosengren.
  • Sites of Environmental Significance in the Flood Plain of the Upper Yarra Valley Region (1983) by Neville Rosengren, Douglas Frood and Kim Lowe (as part of a study of Sites of Environmental Significance by the University of Melbourne for the then Upper Yarra Valley and Dandenong Ranges Authority).
Geological heritage sites, including sites of geomorphological interest and volcanic heritage sites, are under regular revision by the Geological Society of Australia, especially in the assessment of significance and values.Reference should be made to the most recent reports. See the Earth Science Heritage section of the Geological Society of Australia website (external link) for details of geological heritage reports, and a bibliography.

Location:Rhyll – 495406. 2 km west of Rhyll south of the Cowes Road.
Image: Sites of Significance Westernport Bay
Old sand barrier (B) enclosing Rhyll Inlet.
Recurving spit complex (A) and relict
spits and beach ridges (B). Arrows
indicate bluffs on southern side,
Site 179
Access:Cowes to Rhyll Road.
Ownership:Crown land.
Geomorphology:Rhyll Swamp is a freshwater swamp to the south of Rhyll Inlet and separated from the inlet by a ridged barrier of gravelly sand 100 to 400 m wide and up to 2.5 m high (Marsden & Mallett 1975). This barrier has enclosed a former coastal embayment, drainage from the land has been impounded and marine influence excluded from the swamp area for several thousand years.
Significance:Regional. The margins of the swamp represent former coastlines formed at higher sea levels. They illustrate an early phase in the evolution of Rhyll Inlet.
Management:Class 2. Extensions to the tip north of the Rhyll to Cowes Road should be prohibited as this is masking the terrain of the ridge. Continued use as wildlife reserve is compatible with retaining the significant geomorphological features.
References:
Marsden, M.A.H. & Mallett, C.W. (1975). Quaternary evolution, morphology and sediment distribution, Westernport Bay, Victoria. Proc. Roy. Soc. Vict. Vol 87 (1) 107-137.


177. Rhyll Quarry - Rhyll Arkose
Sites 177 to 179, Rhyll Inlet area

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