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Mt Fyans

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 The review of eruption points was based on an earlier unpublished manuscript Catalogue of the post-Miocene volcanoes of Victoria compiled by O P Singleton and E B Joyce (Geology Department, University of Melbourne 1970).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

Location:The Peak.


37 52 00S 142 58 30E (external link); 7422-2-N (Woorndoo North) 738074. 20 km SE of Lake Bolac. Darlington Road.

Mortlake

 Land Tenure/Use:
Private land, unused. Large unused basalt quarry.

Type 6:
Scoria hill.

A low scoria mound caps a broad lava shield consisting of numerous overlapping stony rises lava flows. The summit of the scoria has been extensively quarried and provides very good exposures of red and black bedded scoria, lava bombs, clinker and pods of squeeze up lava.

275 m; 15 m.

Regional:
There is a very clear display of varied pyroclastic material and the internal structure of a small scoria mound. Although the site has little geomorphological value due to the extent of quarrying, it provides good material for geological interpretation with clear exposures of varied pyroclastic material.

Class 3:
The site is extensively disturbed. Several of the exposures of pyroclastic material have potential for interpretation and teaching sites.

References:
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.
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