Parc Cwm Long Cairn - Features

Features

The megalithic cromlech at Parc le Breos Cwm, known as Parc Cwm long cairn (carn hir Parc Cwm), is a Severn-Cotswold type chambered tomb, built around 5850 BP (during the early Neolithic) in what is now known as the Gower Peninsula – about eight miles (13 km) west of Swansea, Wales, and about 1 1⁄4 miles (2 km) north of the Bristol Channel. Alternative names include Parc le Breos burial chamber (siambr gladdu Parc le Breos), the Long Cairn and the Giant's Grave.

The cromlech consists of a north–south aligned long mound of locally obtained rocks and cobbles, mainly of limestone, revetted by two coursed, dry-stone kerbs of "a fine standard". The inner wall was built using a heavier stone. Trapezoid-shaped and about 72 feet (22 m) long, the cromlech tapers from 43 feet (13 m) wide at its southern entrance to about 20 feet (6 m) at its northern end. The wall at the front, right section, is missing or has collapsed, and the rubble has tumbled out leaving a previously covered orthostat exposed.

At the entrance to the tomb the kerbs sweep inwards to form a pair of deep protrusions, or horns, forming a narrow bell-shaped forecourt. A straight central passageway (or gallery), 21 feet (6 m) long by 3 feet (1 m) wide, orientated north–south, leads from the forecourt into the cairn. Each side of the passageway is lined with thin limestone slabs known as orthostats, placed on end and up to 5 feet (1.5 m) high with a coursed dry-stone infill between the slabs. Two pairs of rectangular transept chambers lead from the passageway, averaging 5 1⁄2 feet (1.6 m), east–west, by 3 1⁄4 feet (1.0 m); or "6 ft by 2 ft", according to Archaeologia Cambrensis in 1886. Each, except the south west chamber, has shallow limestone sillstones at its entrance.

Archaeologist R J C Atkinson believed that (unusually among cairns in the Severn-Cotswold tradition) Parc Cwm long cairn had been built beside a stream that now flows underground. He noted that the stones on the eastern side had "marked signs of erosion and rounding by silt-laden flood-water".

Originally, the transept chambers would have been covered with one large (or several smaller) capstones, enclosing the chambers containing human remains. The earth covering and the upper part of the cromlech have been removed, leaving the passageway and lateral chambers fully exposed. There is no record of a capstone having been discovered.

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