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WP1. Selby-Lysterfield - Granodiorite Contact

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 (external link) section of the Geological Society of Australia website for details of geological heritage reports, and a bibliography.

Location:Lysterfield – 566018. Road cuttings on Maskells Hill Road and Temple Road one to two kilometres south of Selby.

Access:
Maskells Hill Road and Temple road.

Ownership:
Crown Land.

Geology/Geomorphology:
The roads traverse the contact zone between the Lysterfield Granodiorite and the Ferny Creek Rhyodacite (one of the main formations of the Mount Dandenong volcanics Group). There are exposures of granodiorite boulders and limited outcrop of metamorphosed (schistose) dacites, the metamorphism being related both to movements on the Selby Fault and to the intrusion of the granodiorite.

Significance:
Regional. This is the main exposure of the Dandenongs volcanic complex in the Westernport Bay catchment and a clear example of the metamorphic textures in these rocks near the Lysterfield Granodiorite.

Management:
Class 2. Exposures on existing and future road cuttings should be left clear and not be obscured by bank stabilisation works.

References:
Berger, A.R. (1961). Studies on dacite-granodiorite contact relationships in the Dandenong Ranges and Warburton areas, Vict. M.Sc. thesis, (unpub.) Geol. Dept., Univ. of Melb.
Singleton (1973).
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