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Blue Mountain

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 The review of eruption points was based on an earlier unpublished manuscript Catalogue of the post-Miocene volcanoes of Victoria compiled by O P Singleton and E B Joyce (Geology Department, University of Melbourne 1970).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.

Wuid Kruirk
Image: Eruption Point
Blue Mountain Summit

37 26 00S 144 18 00E (external link); 7723-2-3 (Trentham) 608537. 4 km N of Blackwood. Tower Track off Old Blackwood Road.

Ballan.

Public land. Forested, public road to summit which is cleared of timber, fire tower, small natural depression on top, abundant fresh outcrop.

Type 4:
Lava hill.
Blue Mountain is a steep high lava volcano with a broad lava flow to the northwest. The mountain consists of two slightly differing types of trachyte lava - the bulk of the mountain and the northern flow are of anorthoclase trachyte while a small flow near the summit is a coarser rock with phenocrysts of feldspar.

837 m; 120 m.

Regional:
This is one of the most elevated eruption points in the Newer Volcanics of Victoria. It is a distinctive landform and the broad domal shape contrasts with the surrounding dissected topography on Ordovician sedimentary rocks. It is accessible, on public land, there is abundant outcrop and it provides a very good example of a rock type of limited distribution in the Newer Volcanics Province.

References:
Fenner, C. 1918. The physiography of the Werribee River area. Proceedings of the Royal Society of Victoria 31 pp. 176-313.
Mahony, D.J. 1931. Alkaline Tertiary rocks near Trentham and at Drouin, Victoria. Proceedings of the Royal Society of Victoria 43, pp 123-129.
Edwards, A.B. 1938. The Tertiary volcanics rocks of central Victoria. Quarterly Journal of the Geological Society of London 94, pp. 243-320.
Coulson, A. 1954. The volcanic rocks of the Daylesford district. Proceedings of the Royal Society of Victoria 65, pp. 113-124.


EP Blue Mountain
Blue Mountain 7723-2-3 (TRENTHAM)
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