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2. Clonmel Island

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 on the Coast of Port Phillip Bay and in the Catchment of Westernport Bay (1984, 88) by Neville Rosengren.
  • Sites of Geological and Geomorphological Significance in the South Gippsland Marine and Coastal Parks (1989) by Neville Rosengren.
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:715122 to 780170. Five kilometres south of Port Albert.
Access:
Boat from Port Albert.

Ownership:
Crown Land.

Geology/Geomorphology:		Clonmel Island is a barrier island nine kilometres long. It consists of two vegetated dune segments separated by a narrow high tide washover and flanked by barrier beaches that extend north-east and south-east. These culminate as recurving spits at the Port Albert Entrance and Kate Kearney Entrance. Behind the barrier beaches is a wide inter-tidal flat of sand and shell which displays a changing array of bedforms – typically small evenly spaced ripples. The configuration of the island is constantly changing due to erosion and deposition by waves and tidal currents and to vegetation colonisation of sand hummocks and berms.

Significance:
National. Clonmel Island, together with the Clonmel Banks to the south-west are classic examples of modes of barrier island formation as they illustrate both erosional and aggregational phases of small barrier history. Maps and charts dating from the mid-nineteenth century and at least five series of vertical aerial photographs taken since 1941 are available to allow measurement of the nature and rates of change of the barrier island to be made.

This, coupled with on-going studies of sediment dynamics allows for better understanding of the origin of the Ninety Mile Beach barriers that extend to the north-east from here.

Management:
Dredging, dumping of dredge spoil, jetty constuction, or any other activity on or adjacent to the island that could alter the existing wave and sediment transport patters would greatly reduce the value of the site and should be prohibited.

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