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9 Swan Bay - Tidal Flat

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 for details of geological heritage reports, and a bibliography.

Location940616. Coastline and bluff 100 m south of the Swan Bay Boat Club.
AccessOff Nankervis Pde, Queenscliff, north of Queenscliff High School
Ownership/Managing AuthorityCrown Land (Borough of Queenscliff and Department of Conservation Forests and Lands).
Site DescriptionThe shoreline is muddy with fine sand and shell fragments on the surface. There is a variable cover of Xostera (Eel grass) on the tidal flat. To the east of the railway line is a calcarenite bluff. By digging a shallow pit into the mudflat, the site can be used to demonstrate the sedimentary characteristics of a low energy depositional environment where shells and fine sediments have been oxidised and leached by fluctuating water tables. The bluff indicates a period of higher energy wave environments.

Significance
Local. The site is a good and readily accessible example of a low energy, fine-grained, shell rich depositional environment. It contrasts with the higher energy sandy coast on the eastern side of the Queenscliff isthmus.

Management Considerations
Class 1. Reclamation, dredging, filling or shell excavation would destroy the nature of the site. Both the intertidal area and the calcarenite bluff need to be preserved without extensive modification.
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