The passage grave of Gavrinis, on a small island in the Gulf, is one of the most important such sites in Europe.
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The entrance location and size determines, ultimately, whether the structure is a passage grave or a dolmen ( J . Ross ).
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Great dolmens reach an average interior size of 14 cubic metres, a scale only otherwise matched by that of the gallery and passage grave.
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Some menhirs were broken up and incorporated into later passage graves, where they had new megalithic art carved with little regard for the previous pictures.
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Maeshowe, the finest example of the passage grave type of chambered cairn ( radiocarbon dated to before 2700 BC ) lies just to the east.
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Not far from the dolmen is a second, smaller one, and about 250 metres west of it a large passage grave can be found.
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We toured the nearby megalithic cemetery at Carrowmore one morning and were astonished at the peculiar spiritual presence this place of stone circles and passage graves exudes.
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These pins are very similar to examples found in passage graves in the Boyne Valley, another piece of evidence suggesting a linkage between the two cultures.
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Nonetheless, these were sometimes recorded, and it is believed that the grave goods that came from Newgrange were typical of Neolithic Irish passage grave assemblages.
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The site covers 780 ha ( 1, 927 acres ) and contains around 40 passage graves, as well as other prehistoric sites and later features.
