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10. Bunyip River - High Level Terraces and Flood Plain

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 (external link) section of the Geological Society of Australia website for details of geological heritage reports, and a bibliography.

Location:Spion Kopje – 905940. Twelve kilometres north Bunyip
Image: Sites of Significance Westernport Bay
Swampy higher level terraces
of the Bunyip River

Access:

Ryson Creek Track via Gentle Annie Road.

Ownership:

Crown Land and private land.

Geology/Geomorphology:

The Bunyip River is flanked by alluvial fans and terrace deposits as it emerges from the ranges to the north. The complexity of old depositional terrain and the reduction of river gradient have combined to produce areas of impeded drainage, characterised by waterlogged and peaty soils, and small open ponds and swamps. On the western side of the valley, these wetlands lie above the present flood plain.

Significance:

Regional. The site illustrates a prior stage in the development of the valley of the Bunyip River. The relationship between vegetation patterns and drainage is clearly demonstrated.

Management:

Class 1. The value of the site depends upon retaining the present patterns of vegetation and drainage. Clearing or artificial drainage of the area should be prohibited.


10 Bunyip River - High Level Terraces and Flood Plain
Bunyip River higher level terraces

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