| 31. | The sides are very steep and the top is flat, indicating that it almost certainly contains a passage grave.
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| 32. | "' Townleyhall passage grave "'is a chamber tomb located around 2 km north of Dowth tomb.
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| 33. | The passage grave is known as Calliagh Birra's House and the small lake is called Calliagh Birra's Lough.
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| 34. | Mullyash Kerbed Cairn is a stepped two-tiered kerbed cairn or bowl barrow, or possibly a kind of passage grave.
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| 35. | In Lebor Gab�la �renn, the Tuatha D?Danann are closely associated with the ancient passage graves of Br?na B�inne such as Newgrange
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| 36. | The entrance passage and the burial chamber are distinguished by sill stones however meaning that they are part of the passage grave tradition.
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| 37. | Although many passage graves showed evidence of continued activity into the Late Neolithic period, La Hougue Bie was abandoned before that time.
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| 38. | Passage graves are usually cairns containing a passage leading to a central corbelled-roofed chamber, which is sometimes a cruciform shape.
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| 39. | The prehistoric Bryn Celli Ddu, considered to be one of Wales's finest passage graves, is located from the river.
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| 40. | In this respect, a long barrow is a long tumulus, usually constructed on top of several burials, such as passage graves.
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