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15.5 Colac Tree Road

This information has been developed from the publications:

  • 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 Geological and Geomorphological Significance in the Shire of Otway (1984) by Neville Rosengren.
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 site) section of the Geological Society of Australia website for details of geological heritage reports, and a bibliography.

Location:15-025125 top 15-005165 (along Colac Tree Road north from Wangerrip).

Access:
Colac Tree Road.

Ownership:
Crown land.

Geology/Geomorphology:
This site is suggested as a strip approximately 100 m wide to the east of Colac Tree Road. It is a traverse demonstrating a landform, soils and vegetation change due to a change in lithology from the Otway Group sediments on the axis of the Crowes Anticline (at Wangerrip) to the leached sands of the Dilwyn Formation five kilometres to the north. On the Otway Group sediments, the valley side slopes fall steeply to Skinner Creek but the terrain is more subdued on the sands of the Dilwyn Formation.

Significance:
Regional. The traverse illustrates a common landform sequence on the north-western flank of the Otway Ranges.

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