Ball's Pyramid as photographed in 2006.
|Elevation||562 m (1,844 ft)|
|Range||Lord Howe Island Group|
|Age of rock||less than 7 million years|
|Volcanic arc/belt||Lord Howe seamount chain|
|Easiest route||Boat overseas|
Ball's Pyramid is an erosional remnant of a shield volcano and caldera that formed about 7 million years ago. It lies 20 kilometres (12 mi) southeast of Lord Howe Island in the Pacific Ocean. It is 562 metres (1,844 ft) high, while measuring only 1,100 metres (3,600 ft) in length and 300 metres (980 ft) across, making it the tallest volcanic stack in the world. Ball's Pyramid is part of the Lord Howe Island Marine Park in Australia.
Ball's Pyramid has a few satellite islets. Observatory Rock and Wheatsheaf Islet lie about 800 metres (2,600 ft) west-northwest and west-southwest respectively, of the western extremity of Ball's Pyramid. Southeast Rock is a pinnacle located about 3.5 kilometres (2.2 mi) southeast of Ball's Pyramid. Like Lord Howe Island and the Lord Howe seamount chain, Ball's Pyramid is based on the Lord Howe Rise, part of the submerged continent of Zealandia.
The pyramid was named after Lieutenant Henry Lidgbird Ball, who discovered it in 1788 on the same trip as when he discovered Lord Howe Island. The first person to go ashore is believed to have been Henry Wilkinson, a geologist at the New South Wales Department of Mines, in 1882.
The first successful climb to the summit was made on 14 February 1965 by a team of climbers from the Sydney Rock Climbing Club, consisting of Bryden Allen, John Davis, Jack Pettigrew and David Witham. There had been an earlier attempt in 1964 by another Sydney team, which included adventurer Dick Smith and other members of the Scouting movement. They were forced to turn back on their fifth day as they had ran short of food and water. In 1979, Smith returned to the pyramid, together with climbers John Worrall and Hugh Ward. They successfully reached the summit and unfurled a flag of New South Wales provided to them by Premier Neville Wran, declaring the island Australian territory (a formality which it seems had not previously been done).
Climbing was banned in 1982 under amendments to the Lord Howe Island Act, and in 1986, all access to the island was banned by the Lord Howe Island Board. In 1990, the policy was relaxed to allow some climbing under strict conditions, which in recent years has required an application to the relevant state minister.
Ball's Pyramid is positioned in the centre of a submarine shelf. The shelf is 20 kilometres (12 mi) in length and averages 10 kilometres (6.2 mi) in width and lies under an average depth of 50 metres (160 ft) of water. It is separated by a 500 metres (1,600 ft) deep, submarine canyon from another shelf on which Lord Howe Island is located. The cliffs of the stack continue under the water surface to the level of shelf.
In 2001, a team of entomologists and conservationists landed on Ball's Pyramid to chart its flora and fauna. As they had hoped, they discovered a population of the Lord Howe Island stick insect (Dryococelus australis) living in an area of 6 by 30 metres (20 by 98 ft), at a height of 100 metres (330 ft) above the shoreline, under a single Melaleuca howeana shrub. The bush was growing in a small crevice where water was seeping through cracks in the underlying rocks. This moisture supported relatively lush plant growth which had, over time, resulted in a build up of plant debris, several metres deep. The population was extremely small, only 24 individuals. Two pairs were brought to two Pacific zoos to breed new populations. On the unsuccessful 1964 climb, Dave Roots brought back a photograph of the insect, which the Australian Museum told him they thought was extinct.
- Geography and Geology, Lord Howe Island Tourism Association. Retrieved on 2009-04-20.
- Jack Pettigrew's climbing page, including reproduced Sydney Morning Herald front page
- Mr Andrew Fraser (Coffs Harbour) in the New South Wales Legislative Assembly, 1 May 1996
- Colin Woodroffe (29 May 2012). "Balls Pyramid and the efficacy of marine abrasion". Vignettes. Carleton College. Retrieved 9 July 2013.
- Giant stick insect rediscovered, science news 14 February 2001 at the Australian Broadcasting Corporation
- Ian Hutton, The Australian Geographic Book of Lord Howe Island, Australian Geographic, 1998, ISBN 1-876276-27-4.
- Rock of Ages, transcript of Australian Broadcasting Corporation Australian Story TV episode, 11 April, 2005.
|Wikimedia Commons has media related to Ball's Pyramid.|
- Lord Howe Island Marine Park
- Lord Howe Island and Ball's Pyramid Nautical Chart issued by the Australian Hydrographic Service
- World Mountain Encyclopedia - Ball's Pyramid
- Volcano World - Balls Pyramid
- Mountaineering exploits: Ball's Pyramid. Bryden Allen.
- Six-Legged Giant Finds Secret Hideaway, Hides For 80 Years.