I3 - Spring Creek - Fault

This information has been developed from this publication:

Sites of Geological and Geomorphological Significance in the Western Region of Melbourne (1986) 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 section of the Geological Society of Australia website for details of geological heritage reports, and a bibliography.

Location:	Ingliston - 620203. Shire of Bacchus Marsh. Valley of Spring Creek, 2 km south of Glenmore.	Site I3
Access:	Brisbane Ranges Road.
Ownership:	Crown land and private land.
Site Description:	Spring Creek Fault delineates the southern boundary of the Ballan Graben. To the south of the fault, Ordovician sedimentary rocks from the Brisbane Ranges, while to the north the Ordovician is buried by a complex of Cainozoic volcanics and sediments. Spring Creek has cut a deep valley, initially parallel to and then crossing the fault, although the stream course is lateral to the lava that caps the Ballan Plateau south of The Bluff. This lava forms an escarpment on the northern side of the valley. Magnesite nodules occur in Tertiary lacustrine clay of the Werribee Formation beneath the basalt.
Significance:	Regional. The site includes a major tectonic and physiographic feature of the Bacchus Marsh district.
Management:	Class 2. The site should be maintained in its present use as public open space and rural land use.

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