Rostellan's dolmen

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Sea level rise over the past 24,000 years. Since the construction of the complex around 4000 BC He rose more by about five meters

The Dolmen of Rostellan (also called Carraig a 'Mhaistín ) in the townland of Rostellan ( Irish Ros Tialláin ) in County Cork in Ireland is a tidal portal tomb , ( English inter-tidal-tomb ), which is only accessible at low tide . The Rostellan Dolmen is located on the coast of Saleen Creek to the east of Cork Harbor , on the edge of a forest. In the British Isles, portal tombs are megalithic systems in which two equally high, upright stones with a door stone in between form the front of a chamber, which is covered with a sometimes huge capstone.

The approximately 1.8 m long capstone, which rests on the two 2.0 m high and 1.5 m wide portal stones, is no longer supported by end stones, as is generally the case with this type. It is also unique in that it opens to the east rather than facing the setting sun like the other Portal Tombs. Based on the tide marks on the stones, the monument appears to be about two-thirds under water at high tide. It is an unusual example, but one that has its parallels in Passage Tomb on Ringarogy Island in the same county and in Brittany .

Due to the rise in sea levels since the dolmen was built around 4000 BC. One can assume that the only inter-tidal dolmen in Ireland was on dry land at the time.

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Coordinates: 51 ° 51 '26 "  N , 8 ° 10' 57.9"  W.