Some end with a semicircular cromlech, but many have since fallen or been destroyed.
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This article is about the early Neolithic cromlech on the Gower peninsula.
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The cromlech was discovered in 1869 by workmen digging for road stone.
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Of other Celtic languages, cromlech derives from Welsh and quoit is commonly used in Cornwall.
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Confusingly, some English-speaking archaeologists, such as Aubrey Burl, use this second meaning for cromlech in English too.
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The earth covering and the upper part of the cromlech have been removed, leaving the passageway and lateral chambers fully exposed.
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There are barrows and a cromlech.
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Skeletal remains from the passageway were part-articulated, showing no sign of animal scavenging, suggesting they were placed in the cromlech as fleshed corpses.
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However, analysis of the human remains found at Parc Cwm long cairn show the people interred in the cromlech continued to be either hunter-gatherers or herders, rather than agricultural farmers.
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Greater leg muscle development was found in males of the Parc Cwm cromlech, possibly the result of hunting or herding, confirming the sexual dimorphism found in previous analyses of the remains.
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More examples
Dolmen: a prehistoric megalithic tomb typically having two large upright stones and a capstone
Cromlech is a Brythonic word (Breton/Welsh) used to describe prehistoric megalithic structures, where crom means "bent" and llech means "flagstone". The term is now virtually obsolete in archaeology, but remains in use as a colloquial term for two different types of megalithic monument.
A dolmen or ancient underground tomb
A Welsh dolmen. Literally and paradoxically "a curved flat-rock".
A dolmen in Wales; a stone circle in France
An ancient mortuary monument consisting of two or more large unhewn stones fixed upright in the ground, supporting a flat horizontal stone (see dolmen)
A prehistoric monument consisting of a circle of monoliths.
Welsh word for a structure of stone, often used as a Grove, or magical circle. Also called a Dolmen.