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Weisler coral dating

It was designated a World Heritage Site by the United Nations in 1988.

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After a party of Pitcairn Islanders collecting miro wood rediscovered the skeletons in March 1958, a medical examination determined that the bones were of Caucasian origin, and they were then buried in a shallow grave inside the cave.Measuring 9.6 kilometres (6.0 mi) by 5.1 kilometres (3.2 mi), it has an area of 37.3 square kilometres (14.4 sq mi) and is located 193 kilometres (120 mi) northeast of Pitcairn Island.It has poor soil and little fresh water, and is unsuitable for agriculture.The reasons for the group's disappearance remain unknown, but may relate to the similar disappearance of the Polynesians on Pitcairn Island, on whom the Hendersonians would have depended for many of the basics of life, especially stone for making tools.Captain Henderson of the British East India Company ship Hercules rediscovered the island on 17 January 1819 and named it Henderson Island; and on 2 March 1819 Captain Henry King in the Elizabeth landed on the island to find the king's colours already flying.His crew scratched the name of their ship into a tree.

A sperm whale rammed and sank the Nantucket whaleship Essex on 20 November 1820 (a report of which inspired Herman Melville to write Moby-Dick), and the crew arrived at Henderson on 20 December in three small whaleboats.

There are three beaches on the northern end and the remaining coast comprises steep (mostly undercut) cliffs up to 15 metres (49 ft) in height.

In 1902 Henderson was annexed to the Pitcairn Islands colony, now a South Pacific British Overseas Territory.

This coral limestone island sits atop a conical (presumed volcanic) mound, rising from a depth of roughly 3,500 metres (11,500 ft).

Its surface is mostly reef-rubble and dissected limestone – an extremely rugged mixture of steep, jagged pinnacles and shallow sink holes – and, except for the north end, the island is encircled by steep limestone cliffs up to 15 metres (49 ft) high.

They found the island's only known drinkable water-source – a brackish spring on the north shore, exposed at half tide – and ate fish, birds, eggs, crabs and peppergrass; but they had largely exhausted the ready food within a week and on 27 December the three boats set sail for South America, leaving behind Thomas Chappel, Seth Weeks, and William Wright who chose to stay, and who survived until their rescue on 9 April 1821.