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Community portal; Recent changes; Upload file; Search. Search. Appearance. Donate; Create account; Log in; ... or portal tomb is a type of single-chamber megalithic ...
The entrance location and size determines, ultimately, whether the structure is a passage grave or a dolmen (J. Ross). In the Netherlands ( Drenthe ), where this form is very common, structures with no passages are known as portal graves; which otherwise, as portal tombs form a sub-group of megalithic tombs on the British Isles but structurally ...
Portal tombs (often referred to as dolmens) are mainly located in the northern half of the country. Such tombs have a straight sided chamber often narrowed at the rear. The entrance is marked by tall portal stones. On top lies a huge single cap stone resting on the portal stones on the front and sloping at the rear where it rests on the backstone.
[2] [3] The tomb is consists of two portal stones, an entrance stone and a collapsed colossal roof stone, which weighs an estimated 75 tonnes. The capstone is the second largest in Ireland after the one at Brownshill dolmen in County Carlow. The tomb has a single chamber. [4] The name Aideen is said to refer to Étaín, a figure in Irish ...
The portal stones are positioned at either side of the lower side of the capstone, marking the tomb's entrance. A threshold stone (or sill) stone lies transverse on an east-west crevice in front of them. [6] The cairn extends an average of 3 m (9.8 ft) from the chamber. [11]
The most common type of megalithic construction in Europe is the portal tomb—a chamber consisting of upright stones with one or more large flat capstones forming a roof. Many portal tombs have been found to contain human remains, but it is debated if their primary function was use as burial sites.
The Meehambee Dolmen is a megalithic portal tomb dating from about 3500 BC located in County Roscommon, Ireland. Two local schoolchildren unearthed two stone axes in the 1960s. [1] Initially supported on six upright portals, 2.3 metres high, the capstone is estimated to weigh twenty-four tonnes.
Proleek dolmen is composed of two portal stones, a lower backstone and a massive capstone, which weighs about 40 tonnes. [5] The portal faces northwest. 90 metres (100 yd) to the SE is a Wedge-shaped gallery grave ("Giant's Grave") with a 6.7 m (22 ft) gallery.