The Bluff (Yallock Vale)

	374330S 1441700E; 7722-1-3 (Ingliston) 590218. 14 km SW of Bacchus Marsh. Glenmore Road.	The Bluff (Yallock Vale)
	Ballan.
Private land:	Grazing, abundant outcrop.
Type 1:	Lava cone with crater.
	A peninsula like ridge of lava is prominent on the southern side of the Parwan Creek valley. The eruption point on the ridge is defined by a shallow crater enclosed by a circle of dipping lava beds and an accumulation of scoria. There are massive landslips and other mass movement forms in the Tertiary sedimentary beds beneath the lava.
	420+ m; 30 m.
State:	The bluff is one of the most prominent landforms of the Parwan Valley which itself is a broad feature of considerable geological significance. The crater area is well-defined by eroded lava ridges and is one of the few examples in the region of crater forms preserved on a lava volcano. The massive landslips are one of the major examples of mass movements in Victoria and are directly related to the overlying resistant volcanic rocks.
Class 2:	The eruptions site is small and the outcrop is vulnerable to physical damage. The current agricultural land use is compatible with maintaining the geological and geomorphological values of the site.
References:	Rosengren, N.J. 1986. Explanatory notes on Bacchus Marsh and Ballan 1: 50 000 geological maps. Geological Survey of Victoria Report 76.

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