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8 Duck Island to Port Norgate - Tidal Flats

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.


Location
968650 to 975668. Point Norgate to Duck Island including intertidal and shoal area.
Image: Sites of Significance Port Phillip Bay
Site 8, Duck Island and Point Norgate

Access
The site is accessible only by boat and has not been field checked for this survey.

Ownership/Managing Authority
Commonwealth Land (Department of Defence) and Crown land (Department of Conservation, Forests and Lands).

Site Description
Duck Island is a low sandy island 1.5 km north of the western peninsula of Swan Island (Point Norgate). It is an extension of the original barrier or spit system that built this peninsula and is linked by a broad tidal flat exposed at low tide. This flat is terminated north of Duck Island by the tidal channel that links Swan Bay to Port Phillip Bay.

Significance
Unknown. The site is evidence that Swan Island and adjacent tidal areas have a complex depositional history as a barrier, spit, embayment and tidal system. No detailed study has been undertaken to determine the history of this system.

Management Considerations
Class 2. The island and tidal flats should not be used as a dumping area for dredge spoil.


Swan Island / Duck Island
Site 7 & 8, Swan Island and Duck Island/Point Norgate
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