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8423-8 Wilga Prospect Area

This information has been developed from the publications:

    • Sites of Geological and Geomorphological Significance in Central Gippsland (1981) by Neville Rosengren, M.S McRae-Williams and S.M Kraemers.
    • Sites of Geological and Geomorphological Significance in the Gippsland Lakes Catchment (1984) by Neville Rosengren.
    • Sites of Geological and Geomorphological Significance in East Gippsland, Victoria (1981) by Neville Rosengren, M.S McRae-Williams
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 values. Reference should be made to the most recent reports. See the Earth Science Heritage section of the Geological Society of Australia website for details of geological heritage reports, and a bibliography.


Location:
786044. 7 kilometres east of Mt Tambo.

Abstract:
Road cutting exposing the marine part of the Enano Group, overlying the Thorkidaan Volcanics.

Access:
Road to Wilga Prospect.

Ownership:
Crown land.

Geology:
At this locality the upper ignimbritic rhyolites of the Thorkidaan Volcanics are overlain by volcanogenic sediment with pebble-ringed volcanic fragments. This material is in turn overlain by quartz-rich siltstone of the Gibsons Folly Formation, which in its lower part still contains the same pebble-sized volcanic fragments. This section provides clear evidence that the marine part of the Silurian sequence overlies the Thorkidaan Volcanics.

Significance:
Regional. This is the only site documented where the relationship between the Enano Group and the Thorkidaan volcanics well displayed.

Management:
The significance of this site would be enhanced by the maintenance of clear sections in the road cutting.

References:
Vandenberg, A.M.H., Bolger, P., and O’Shea, P.J. 1980. (in press) 'Geology and Mineral Exploration of the Limestone Creek-Reedy Creek Area, North-East Victoria', Geolo. Surv. Vict.
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