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136. Corinella - Corinella Structure

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:
Corinella - 63.473. One kilometre east of the jetty at Corinella.
Image: Sites of Significance Westernport Bay
"Ironstone" ridges at Corinella, Site 136
Access:Corinella Road and walk east from Jamieson Street.
Ownership:Crown land.
Geology:The shore platform and beach exposes a contact between ferruginous Baxter Formation and Older Volcanics, the coarse current-bedded structures of the Baxter Formation dipping steeply to the north indicating considerable drag or upwarping of these beds (Thompson, 1974). Jenkin (1962) described projecting ribs of ironstone occurring on the faulted contact between the formations. Thompson (1974) considered the structure to be monoclinal rather than faulted, and suggested the ironstone beds were indurated due to water outflow along the weathered contact at the top of volcanics. The fault/monocline determines the alignment of the coast and the details of shoreline configuration are related to different rates of weathering and erosion of the materials exposed at the contact.
Significance:State. The site is a clear display of a major geological feature and shows the influence of lithology and structure on shoreline development. The uncertainty about the nature of the structure is of particular significance at the site.
Management:Class 1. Activities that will damage the site in any way should not be permitted. These include roadworks, excavation, coastal protection structures, and dumping of material on the beach, shore platforms and the adjacent buffers.

References:

Jenkin, J.J. (1961). The geology and hydrogeology of the Westernport area. M.Sc. thesis (Unpub.), Dept. of Geol. Univ. of Melb.
Thompson, B.R. (1974). The geology and hydrogeology of the Westernport sunklands. Geol. Surv. Rept. 1974/1.
McMickan (1977).

Sites 134 135 136
Sites 133, 134, 135 & 136, Corinella area
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