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30. Labertouche Caves - Granite Caves

This information has been developed from one or more of these publications:

  • Sites of Geological and Geomorphological Significance in the Westernport Bay Catchment (1984) by Neville Rosengren.
  • Sites of Geological and Geomorphological Significance in the Western Region of Melbourne (1986) by Neville Rosengren
  • Sites of Geological and Geomorphological Significance on the Coast of Port Phillip Bay (1988) by Neville Rosengren.
  • Sites of Environmental Significance in the Flood Plain of the Upper Yarra Valley Region (1983) by Neville Rosengren, Douglas Frood and Kim Lowe (as part of a study of Sites of Environmental Significance by the University of Melbourne for the then Upper Yarra Valley and Dandenong Ranges Authority).
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 (external link) for details of geological heritage reports, and a bibliography.

Location:Labertouche - 988929. Seven kilometres north-east of Labertouche.

Access:

Jacksons Track of Labertouche Road.

Ownership:

Crown land.

Geology/Geomorphology:

Labertouche cave is a stream passage cave developed in Tynong Granite. It is occupied by a tributary of Labertouche Creek which flows underground for a distance of 175 metres. The accessible cave section is slightly shorter than this and is entered through an old stream sink located above the currently active stream passages. The cave consists of a passage through a pile of corestones of granite and in places there are exposures of in situ granite. Vigorous stream flow is maintained, which transports sand and gravel through the cave. Grooved and polished boulder surfaces found at several levels throughout the cave illustrate the abrasive action of this transported sediment. A smaller cave 200 metres to the east is on another tributary stream, but as yet no accessible cave passage has been discovered to this cave.

Significance:

National. There are only three known accessible cave passages in acid igneous rocks in Victoria, and there are few other examples in Australia. As cave development in this lithology is rare, the precise mode of origin of the Labertouche Cave is not known. The site is therefore of considerable importance for the study of weathering, mass wasting and stream passage development.

Management:

Class 1. Quarrying, roadworks, or any construction activities at and upstream of the cave site should be completely prohibited. The valley slopes adjacent to the site and on the tributaries upstream should not be cleared, or be permitted to be inundated by water storage or diversion schemes. No activity that would generate debris or waste should be allowed in the catchment of the site as this could block or divert stream flow and obscure the cave entrances.

References:

Finlayson (1981).

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