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Mount Kororoit

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 The review of eruption points was based on an earlier unpublished manuscript Catalogue of the post-Miocene volcanoes of Victoria compiled by O P Singleton and E B Joyce (Geology Department, University of Melbourne 1970).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

37 39 16S 144 39 41E (external link); 7822-4-2; (Sydenham West); 936296.
Image: Eruption Point Mt Kororoit
Mount Kororoit

5 km SW of Diggers Rest. Leakes Road.

Melton.

Private land.
Cropping on lower slopes, grazing, abundant outcrop at summit.

Type 9:
Composite lava and scoria volcano.

Mount Kororoit is a small asymmetric conical hill with a flattened summit, steep southern slopes and a long, gentle northern slope of eroded lava. On this flow is a broad, swampy depression north of Holdens Road. The hill is predominantly of scoria and is capped by a rocky outcrop of lava and lava agglomerate. Several narrow arcuate ridges of vesicular lava are prominent on the summit and the northern slopes and suggest a complex internal structure of the volcano.

237 m; 60 m.

State:
This is a fine example of the small, complex eruption points that occur on the plains between Melbourne and Woodend. It is an unusual scoria cone in the context of the Newer Volcanics Province in that late-stage lava flows erupted from and filled the throat and crater of the volcano, covering earlier formed scoria deposits. Geophysical studies of Mount Kororoit have been the basis for developing a model for the evolution of these type of volcanoes.

References:
Coulson, A. (1938). The basalts of the Geelong district. Proceedings of the Royal Society of Victoria 50, pp. 394-402.
Edwards, A.B. & Crawford, W. (1940). The Cainozoic volcanic rocks of the Gisborne district, Victoria. Proceedings of the Royal Society of Victoria 52, pp. 281-311.
Ollier, C.D. & Joyce, E.B. (1964). Volcanic physiography of the Western Plains of Victoria. Proceedings of the Royal Society of Victoria 77, pp. 357-376.
Ollier, C.D. (1967a). Landforms of the Newer Volcanic Province of Victoria. In J.N. Jennings & J.A. Mabbutt (eds), Landform studies from Australia and New Guinea. ANY Press. pp. 315-339.
Fischer,W.S. & Thomas, L. (1981). A study of Mount Kororoit, Victoria - a small volcanic vent. Proceedings of the Royal Society of Victoria 93, pp. 99-103.
Mt Kororoit
Mount Kororoit 7822-4-2 (Sydenham West)
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