Golf Course Hill

This information has been obtained from the report: Eruption Points of the Newer Volcanic Province of Victoria by Neville Rosengren. This report was published in 1994 and was prepared for the National Trust of Australia (Victoria) and the Geological Society of Australia (Victorian Division). The review of eruption points was based on an earlier unpublished manuscript Catalogue of the post-Miocene volcanoes of Victoria compiled by O P Singleton and E B Joyce (Geology Department, University of Melbourne 1970).

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 value. 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.

Old Racecourse Hill		Golf Course Hill 7823-3-4 (Woodend)
72 20 59S 144 31 35E (external link); 7823-4 (Woodend) 812638. 1 km NW of Woodend.
Newham and Woodend.
Public land (Woodend golf course). Access just behind green 5.
Type 1:	Lava cone with crater.
	This site is a small lava cone with a shallow crater open to the north. Lava from a small disused quarry is a tough glassy rock (alkali limburgite) containing crystals of didymitis up to 3 mm across in high temperature vesicles. This lava was referred to as “woodendite” but the use of such local nomenclature is now discouraged. Radiometric dating of this rock gave the age of the eruption as 6.81 0.12 million years ago.
	622 m; 45 m.
Regional:	This is an uncommon lava and contains unusually large crystals of didymitis. The quarry is often visited by geology excursion groups. The rock has petrological and age affinity with the Hanging Rock/Camels Hump group and is a member of the “Woodend” sub-province of Cainozoic volcanic rocks.
References:	Skeats, E.W. & Summers, H.S. (1912). The geology and petrology of the Macedon district. Geological Survey of Victoria Bulletin 24. Edwards, A.B. (1938). The Tertiary volcanic rocks of Central Victoria. Quarterly Journal of the Geological Society of London 94, pp. 243-320. Hills, E.S. (1940). The physiography of Victoria (1st edn,) Whitcombe & Tomba, Melbourne. Wellman, P. (1974). Potassium-argon ages on the Cainzoic volcanic rocks of eastern Victoria, Australia. Journal of the Geological Society of Australia 21, pp. 359-376. Birch, W.D. (1988). Specimen minerals. In J.G. Douglas & J.A. Ferguson (eds) Geology of Victoria. Geological Society of Australia, Victorian Division, Melborune. pp. 482-493.

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