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117. The Gurdies - Mangrove Die-Back

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:
Lang Lang - 732518. One kilometre west of The Gurdies.

Access:
Blackney West Road.

Ownership:
Crown Land.

Geomorphology:
A small embayment has been eroded at the mouth of a drain. The erosion is a result of die-back of mangroves, probably due to the impact of increased freshwater discharge from the drain.

Significance:
Local. The site illustrates the consequence of changing the salinity in a mangrove environment leading to mangrove die-back and coastal erosion.

Management:
Class 3. Changes in land use will not alter the significance of the site.
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