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204. Chilcott Rocks - Ferruginous Sandstone

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:Barrallier - 490529. Approximately 2.5 km north of Tankerton Jetty.
Image: Sites of Significance Westernport Bay
Outcrop of ferruginous sandstone at Chilcott
Rocks (arrowed). Note the low coastal
bluff (A), the absence of mangroves,
and the extensive amount of sand in
the nearshore area (B), Site 204

Access:
A sandy vehicle track leads directly onto the outcrop.

Ownership:
Crown land.

Geology/Geomorphology:
A prominent outcrop of ferruginous sandstone is exposed at high tide level. The sandstone is fine grained, highly ferruginous and appears to exhibit horizontal bedding features. Chemical weathering by saline solutions has resulted in small hollows on the upper surface of the outcrop.

Significance:
Regional. This outcrop is one of the few areas of ferruginous sandstones which may be readily observed at high tide level. Other ferruginous outcrops indicated on the geological sheet occur at inter-tidal levels and are not as accessible for study, due to their tidal submergence.

Management:
Class 1. The ferruginous sandstones outcropping on the coast have been used to provide construction material for buildings. To preserve the extent of this outcrop it is recommended that no further extraction of stone be permitted from the site.

205. Tankerton to River Point
Sites 204 to 207, North of Tankerton
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