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23. Tynong - Alluvial Ridges and Swamp Deposits

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:Nar Nar Goon - 772823 to Tonimbuk - 813802. Four kilometres south of Tynong.

Image: Sites of Significance Port Phillip Bay
Low granite ridges (A) and abandoned channels and levees of the Bunyip River.

Access:

Lone Pine Road, Tynong Catani Road, Daly Road, McGraws Road.

Ownership:

Private Land.

Geomorphology:

The site includes three groups of landforms. West of Lone Pine Road a low hill is and inlier of Tynong Granite surrounded by alluvium and swamp deposits. The trace of a former stream course is apparent where it crosses Lone Pine Road and the Tynong to Cantani road. The channel is flanked by sandy levee banks, and originated as a distributary on the Bunyip River alluvial fan. The very level terrain between Ararat Creek and the Tynong to Bayles road, is a tongue of drained swampland that represents the northernmost limits of the peaty deposits of the Koo-Wee-Rup Swamp.

Significance:

Regional. The site encloses the typical terrain types of the northern Koo-Wee-Rup Plain.

Management:

Class 2. Subdivision or extensive construction works and excavation should not be permitted on the area of the site.

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