Sarsen

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Sarsens in a garden in Wiltshire Sarsen in Wiltshire.jpg
Sarsens in a garden in Wiltshire

Sarsen stones are silicified sandstone blocks found extensively across southern England on the Salisbury Plain and the Marlborough Downs in Wiltshire; in Kent; and in smaller quantities in Berkshire, Essex, Oxfordshire, Dorset, and Hampshire.

Contents

Geology

Sarsen stones are the post-glacial [1] remains of a cap of Cenozoic silcrete that once covered much of southern England. This is thought to have formed during Neogene to Quaternary weathering by the silicification of Upper Paleocene Lambeth Group sediments, resulting from acid leaching. [2]

Etymology

The word "sarsen" is a shortening of "Saracen stone" which arose in the Wiltshire dialect. In the Middle Ages, "Saracen" was a common name for Muslims, and came by extension to be used for anything regarded as non-Christian, whether Muslim or pagan in contrast to Christianity. [3]

Human uses

The builders of Stonehenge used these stones for the Heel Stone and sarsen circle uprights. [4] [5] Avebury and many other megalithic monuments in southern England are also built with sarsen stones. [6]

While sarsen stones are not an ideal building material, fire and in later times explosives were sometimes employed to break the stone into pieces of a suitable size for use in construction. William Stukeley wrote that sarsen is "always moist and dewy in winter which proves damp and unwholesome, and rots the furniture". [7] [8] In the case of Avebury, the investors who backed a scheme to recycle the stone were bankrupted when the houses they built proved to be unsaleable and also prone to burning down. However, despite these problems, sarsen remained highly prized for its durability, being a favoured material for steps and kerb stones.

See also

Related Research Articles

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Fyfield may refer to:

<span class="mw-page-title-main">Fyfield (near Marlborough)</span> Human settlement in England

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<span class="mw-page-title-main">West Overton</span> Human settlement in England

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<span class="mw-page-title-main">Hertfordshire puddingstone</span> Conglomerate sedimentary rock

Hertfordshire puddingstone is a conglomerate sedimentary rock composed of rounded flint pebbles cemented together by a younger matrix of silica quartz. The distinctive rock is largely confined to the English counties of Buckinghamshire and Hertfordshire but small amounts occur throughout the London Basin. It is quite commonly found in fields in and around Chesham, where pieces can be seen as boundary stones and in rockeries. Despite a superficial similarity to concrete, it is an entirely natural silcrete. A fracture runs across both the pebbles and the sandy matrix as both have equal strength unlike concrete where the pebbles remain whole and a fracture occurs only in the matrix. Like other puddingstones, it derives its name from the manner in which the embedded flints resemble the plums in a pudding. It forms the local base of the Upnor Formation of the Lambeth Group.

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<span class="mw-page-title-main">Silcrete</span>

Silcrete is an indurated soil duricrust formed when surface soil, sand, and gravel are cemented by dissolved silica. The formation of silcrete is similar to that of calcrete, formed by calcium carbonate, and ferricrete, formed by iron oxide. It is a hard and resistant material, and though different in origin and nature, appears similar to quartzite. As a duricrust, there is potential for preservation of root structures as trace fossils.

<span class="mw-page-title-main">Fyfield Down</span>

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<span class="mw-page-title-main">Hackpen White Horse</span>

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<span class="mw-page-title-main">Falkner's Circle</span> Neolithic stone circle in Wiltshire, England

Falkner's Circle was a stone circle near the village of Avebury in the south-western English county of Wiltshire. Built from twelve sarsen megaliths, it measured about 37 metres (121 ft) in diameter, although only one of these stones remains standing.

Winterbourne Bassett Stone Circle is the remains of a stone circle near the village of Winterbourne Bassett in Wiltshire, South West England. Investigations in the 18th and 19th centuries found evidence of an outer and inner ring, and a single central stone; today six stones are visible although none remain upright.

<span class="mw-page-title-main">West Woods</span>

West Woods is a wood about 2+12 miles (4 km) southwest of the market town of Marlborough in the English county of Wiltshire, United Kingdom. Its area is approximately 957 acres (387 ha). It is open to the public, and is popular with visitors in the Spring, when bluebells cover the forest floor.

References

  1. Small, R.J.; Clark, M.J.; Lewin, J. (January 1970). "The periglacial rock-stream at Clatford Bottom, Marlborough Downs, Wiltshire". Proceedings of the Geologists' Association. 81 (1): 87–98. doi:10.1016/s0016-7878(70)80037-2.
  2. Stewart Ullyot, J.; Nash, D.J.; Whiteman, C.A.; Mortimore, R.N. (2004). "Distribution, petrology and mode of development of silcretes (sarsens and puddingstones) on the eastern South Downs, UK". Earth Surface Processes and Landforms . 29 (12). Bibcode:2004ESPL...29.1509U. doi:10.1002/esp.1136.
  3. Stevens, Frank (1926). "The Lithology of Stonehenge". Stonehenge Today & Yesterday. London: HMSO. OCLC   1167089420.
  4. Bruce Bedlam. "The stones of Stonehenge".
  5. Steven Morris (14 April 2020). "Like Lego: rare photo shows Stonehenge construction technique". The Guardian.
  6. "Stone ring of Avebury". Places of Peace and Power.
  7. William Stukely (1743), Palaeographia Britannica, vol. 1
  8. Edward Herbert Stone (1924), The Stones of Stonehenge, p. 54

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