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Bf6 Dog Rocks - Granite and Epidorite


Geelong - Maude Area, Tertiary Stratigraphic Sites

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

LocationBatesford - 619792. Former Shire of Bannockburn. Western side of Moorabool River, 1 km southeast of ‘Lilydale House’.

Access
Dog Rocks Road.

Ownership
Private land.

Site Description
The site includes outcrops and boulders of the pink, coarsely porphyritic Dog Rocks Granite. This granite is similar in lithology and age to the granites of the You Yangs, and the Dog Rocks once stood as islands in the Miocene age sea that deposited the Batesford Limestone. On the surface are several small boulders of hard, dense lepidolite (greenstone), a Cambrian rock which has been intruded by the granite. Much of the Cambrian outcrop has now been covered by overburden from the Batesford Quarry.

SignificanceRegional This is one of only two Cambrian outcrops recorded in the study area and is equivalent to the oldest rocks known in Victoria. It is the last remnant of the formerly more extensive lepidolite outcrops at the Dog Rocks.

ManagementClass 1. This small site should be reserved from the quarry lease and not further covered with overburden or otherwise obscured.

ReferencesCoulson, A. (1930).Notes on the relationship of Epidorite and the Granite at Barrabool Hills and Dog Rocks near Geelong, Victoria. Proc. R. Soc. Vict. 42:99-109.
Spencer-Jones, D. (1970).


Bf6 - Dog Rocks, Batesford. Arrow shows outcrop of diabase.

Bf6 - Diabase (arrow) and Dog Rocks Granite, Dog Rocks.

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