Rosetta Head

Rosetta Head
South Australia

Rosetta Head, west side
Rosetta Head
Coordinates 35°35′29″S 138°36′14″E / 35.59139°S 138.60389°E / -35.59139; 138.60389Coordinates: 35°35′29″S 138°36′14″E / 35.59139°S 138.60389°E / -35.59139; 138.60389
Postcode(s) 5211
Elevation 97 m (318 ft)[1]
LGA(s) City of Victor Harbor
Localities around Rosetta Head:
Fleurieu Peninsula Encounter Bay Encounter Bay
Fleurieu Peninsula Rosetta Head Encounter Bay
Great Australian Bight Great Australian Bight Great Australian Bight

Rosetta Head (also known as Kongkengguwar), which is more commonly known as The Bluff, is a headland located on the south coast of Fleurieu Peninsula in South Australia in the suburb of Encounter Bay within the city of Victor Harbor and about 77 kilometres (48 mi) south of Adelaide. It is a prominent landmark on the coast of Encounter Bay which is currently used as a recreational reserve and which is notable as a platform to view the adjoining coast and surrounding countryside.

Description

Rosetta Head is located in the suburb of Encounter Bay about 3.9 kilometres (2.4 mi) south-west by south of the centre of Victor Harbor and about 77 kilometres (48 mi) south of Adelaide.[2] When viewed from a platform such as a ship, it appears as being ‘a grassy mound, 97 metres (318 ft) high, cliffy on its E(ast) side, and covered with granite boulders; it is steep-to on its E(ast) and S(outh) sides.’[3] Its southern tip is considered by Australian authorities as being the western extent of Encounter Bay.[4] On its northern side, there is a small wharf which is connected to the adjoining urban area by a road and which adjoins a body of water is known as Rosetta Harbor. On its southern side, there is a small cove called Petrel Cove.[1]

Formation, geology & oceanography

Rosetta Head as a headland was formed when the sea reached its present level 7,500 years ago after sea levels started to rise at the start of the Holocene. As a landform, it is a large domed inselberg which is considered to be ‘the most prominent feature along Encounter Bay coastline’ and whose form is due to its origins via the geological processes of metamorphism and intrusion followed by two phases of erosion; firstly via the action of a northward-moving glacier during the Permian which created the distinctive dome shape and then by wave action from the south due to the sea level rise during the Holocene. When viewed from the adjoining coastline, it is considered to be a typical example of a glacial terrain known as a roche moutonnee.[5][6][7][8] Geologically, Rosetta Head is the result of the intrusion of molten granite (known as Encounter Bay Granite) into a grey metamorphic rock (known as the Kanmantoo group) which was subsequently elevated as part of a mountain building event known as the Delamerian Orogeny between 475 and 500 million years ago.[7] The water adjoining the base of Rosetta Head drops to a maximum depth of 12.8 metres (42 ft) within a distance of 100 metres (330 ft) of its shore.[1]

Naming

Rosetta Head was named in 1839 after Rosetta French, the wife of George Fife Angas reportedly by George Gawler, the second Governor of South Australia.[9][10] The use of the name ‘The Bluff’ which is the most commonly used name for the headland is attributed to whalers operating in the locality prior to the adoption of the name Rosetta Head.[11][12] The Ramindjeri, the Australian Aboriginal people who traditionally live in the locality, use the name Kongkengguwar.[13][14]

History

European discovery and use

Rosetta Head was the site of a whaling station and its peak was used as a look-out point to locate whales. The station was established in 1837 and operated until the early 1860s.[9][15][16] The wharf, an adjacent sea wall and the connecting road were completed in 1856 by the SA Government to assist whaling industry activity. The wharf was known as the 'Lilliputian Jetty' due to its relatively small size, i.e. 12.7 metres (42 ft) wide by 4.6 metres (15 ft) deep.[17] A mine was established on Rosetta Head in 1863 to search for copper and other minerals until the abandonment of the venture in 1866.[18] A tablet set into a granite boulder located near Rosetta Head’s summit was unveiled on 8 April 1902 by the Governor of South Australia, The Right Honourable Hallam, Baron Tennyson, KCMG to commemorate the centenary of the meeting of the European explorers, Matthew Flinders and Nicolas Baudin, in nearby waters.[19]

Current land use

Rosetta Head is used as a public recreation reserve which is managed by the City of Victor Harbor. A walking trail ascends to the summit where views of the adjoining coastline including the Victor Harbor urban area and the nearby islands are available as well as the opportunity to observe southern right whales in the nearby waters between the months of May and November. As of 2007, a proposal existed to connect the Rosetta Head walking trail to the Heysen Trail to its west via a trail following the coastline.[18][20][21] A sandy beach on the north side of Rosetta Head is notable as a site for swimming while the wharf is used for recreational fishing. A sandy beach on the south side of the head at Petrel Cove is known for its surfing and surf fishing but is considered to be a hazardous location for swimming. The sea around Rosetta Head is a popular site for recreational diving and is notable as a place to see Leafy sea dragons.[22][23][24]

Gallery

References

  1. 1 2 3 South Australia. Department of Marine and Harbors (1985), The Waters of South Australia a series of charts, sailing notes and coastal photographs, Dept. of Marine and Harbors, South Australia, pp. Charts 10, ISBN 978-0-7243-7603-2
  2. ↑ "Suburbs Map - District" (PDF). City of Victor Harbor. Retrieved 31 July 2015.
  3. ↑ Pub175, Sailing directions (enroute) north, west, and south coast of Australia (PDF) (10th ed.). National Geospatial-Intelligence Agency. 2010. p. 215. Retrieved 16 May 2014.
  4. ↑ "Seas and Submerged Lands (Historic Bays) Proclamation 2006". Commonwealth of Australia. Retrieved 29 July 2014.
  5. ↑ Robinson, A. C. & Armstrong, D. M. (ed.). A Biological Survey of Kangaroo Island, South Australia, 1989 & 1990 (PDF). Adelaide, SA: Heritage and Biodiversity Section, Department for Environment, Heritage and Aboriginal Affairs, South Australia. p. 26. ISBN 0 7308 5862 6. Retrieved 1 May 2014.
  6. ↑ "Rosetta Head, Franklin Pde, Encounter Bay, SA, Australia (Register of the National Estate (Non-statutory archive))". Department of the Environment. 21 October 1980. Retrieved 29 June 2014.
  7. 1 2 Noel Hiern, Field Guide Subcommittee, Geological Society of Australia (South Australian Division) (2012). "Geological trail VICTOR HARBOR, A self-drive geological trail" (PDF). Government of South Australia, Department for Manufacturing, Innovation, Trade, Resources and Energy. pp. 2–3. Retrieved 15 August 2014.
  8. ↑ "Geological Sites, The Bluff". City of Victor Harbor. Retrieved 16 August 2014.
  9. 1 2 Webb, Lucy (10 October 1936). "Historic Victor Harbor". The Mail. p. 10. Retrieved 29 June 2014.
  10. ↑ "Commemoration Address". The Register. 15 April 1927. p. 8. Retrieved 16 August 2014.
  11. ↑ Newland, Simpson (2 December 1893). "Paving the way, A romance of the Australian bush, Part 1 - On the coast". South Australian Chronicle. p. 10. Retrieved 15 August 2014.
  12. ↑ "‘Paving the way’, The romance of Victor Harbor". The Register. 19 September 1924. p. 11. Retrieved 16 August 2014.
  13. ↑ "The Romantic South, some early history, part IV". The Register. 22 September 1928. p. 5. Retrieved 16 August 2014.
  14. ↑ "Kongkengguwar". Gazetteer of Australia online. Geoscience Australia, Australian Government.
  15. ↑ "South Australian Company". South Australian Gazette and Colonial Register. 3 June 1837. p. 4. Retrieved 16 August 2014.
  16. ↑ "The Romantic South, some early history, part III". The Register. 15 September 1928. p. 5. Retrieved 16 August 2014.
  17. ↑ Collins, Neville C (2005), The jetties of South Australia : past and present, Neville Collins, p. 192, ISBN 978-0-9580482-2-4
  18. 1 2 "The Bluff Summit Walk" (PDF). City of Victor Harbor. Retrieved 29 June 2014.
  19. ↑ "The meeting of Flinders and Baudin, Commemorated at the Bluff, An interesting event". The Register. 9 April 1902. p. 6. Retrieved 24 July 2014.
  20. ↑ "City of Victor Harbor Reserves" (PDF). City of Victor Harbor. Retrieved 14 August 2014.
  21. ↑ City of Victor Harbor Recreation and Open Space Study: Recreation and Open Space Strategic Directions Report Volume 2 – FINAL DRAFT (PDF). Suter Planners. February 2007. p. 51.
  22. ↑ "Petrel Cove, unpatrolled beach". Surf Life Saving Australia. Retrieved 16 August 2014.
  23. ↑ "Rosetta Head, unpatrolled beach". Surf Life Saving Australia. Retrieved 14 August 2014.
  24. ↑ Neville Coleman; Nigel Marsh. "Victor Harbour (sic)". Underwater Australia. Neville Coleman. Retrieved 14 August 2014.
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