Pelorus Islet
 Pelorus Islet
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| Location | Great Australian Bight |
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Australia
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| Population | 0 |
Pelorus Islet (also known as Pelorus Reef and Pelorus Rock) is an islet located in Great Australian Bight off the south coast of Kangaroo Island in the Australian state of South Australia approximately 7 kilometres (4.3 mi) east south-east of Cape Gantheaume. It was named by Captain Francis Harding, RN after HMS Pelorus.
Pelorus Islet is about 7 kilometres (4.3 mi) east south-east of Cape Gantheaume. It consists of three separate islets - a main round topped peak of 12 metres (39 ft) height with a reef with several rocks sitting above water level to its east and another exposed rock to its south-west. It is inaccessible by boat as it is subject to continuous swells.
Peloris Islet was formed between 7500 and 8900 years ago after sea levels rose at the start of the Holocene when Kangaroo Island became separated from Yorke and Fleurieu Peninsulas. Pelorus Islet is the remains of a volcanic intrusion reported as being some 506 million years old. The islet rises abruptly from a depth of 35 metres (115 ft).
As of 1996, no terrestrial vegetation was present as the islet has been ‘scoured of any soil and small eroded fragments, leaving only a few large boulders’ while the only vertebrate animals observed were New Zealand fur seals and crested terns.
Nicolas Baudin is reported as being the first European to describe the islet, however he did not name the islet. The islet was surveyed in May 1838 by HMS Pelorus under the command of Captain Francis Harding RN. It is reported that Harding named the islet after the ship. The Pelorus Islet is reported as being the site of the wrecking of You Yangs on 14 June 1890. You Yangs was a 672 gross tonnage barque rigged screw steamer owned by Howard Smith and Sons.
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Wikipedia