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165. Woolamai - Siliceous Sediments

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:Dalyston – 712372. 1 km south-east of the Woolamai Race Track.

Access:
Trew Road and Pomfret Road.

Ownership:
Private land.

Geology/Geomorphology:
On the upper slopes of the Bass Fault scarp near Woolamai are outcrops and rock fragments that differ from the typical Mesozoic and Tertiary rocks of other parts of the Bass River catchment (Power 1971). They include feldspathic grits and a highly silicified sedimentary rock of uncertain origin. Power (1971) suggested the material may be derived from Palaeozoic rocks that had in part undergone weathering and conversion to silcrete.

Significance:
Regional. The silicified rocks are unusual in the Westernport catchment and their origin is uncertain.

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

References:
Power (1971).
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