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・ Elvin Bishop
・ Elva (car manufacturer)
・ Elva C (deck boat)
・ Elva Dryer
・ Elva Goulbourne
・ Elva Hsiao
・ Elva Hsiao (album)
・ Elva kvinnor i ett hus
・ Elva Lawton
・ Elva Nampeyo
・ Elva R. Kendall
・ Elva, Estonia
・ Elva, Illinois
・ Elva, Manitoba
・ Elva, Piedmont
Elvan
・ Elvan (disambiguation)
・ Elvan Abeylegesse
・ Elvan Akyıldız
・ Elvan George
・ Elvan, Virginia
・ Elvana Gjata
・ Elvandar
・ Elvandia Story
・ Elvanfoot
・ Elvanfoot railway station
・ Elvange
・ Elvange, Moselle
・ Elvania Namukwaya Zirimu
・ Elvanlar, Kurucaşile


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Elvan : ウィキペディア英語版
Elvan

Elvan is a name used in Cornwall and Devon for the native varieties of quartz-porphyry. They are dispersed irregularly in the Upper Devonian series of rocks and some of them make very fine building stones (e.g. Pentewan stone, Polyphant stone and Catacleuse stone). Greenstone is another name for this stone and it is often used for parts of buildings such as doorways so they can be finely carved. Most of the elvan quarries are now disused. Others are quarried in bulk for aggregates commonly used for road-building.〔Pevsner, N. (1970) ''Cornwall'', 2nd ed. Penguin Books; pp. 31–34〕〔Reid, Clement; Barrow, G.; Dewey, Henry (1910) ''The Geology of the Country round Padstow and Camelford''. (''Memoirs of the Geological Survey'' ... sheets 335 & 336) London: H.M.S.O.; pp. 58–61〕
==Archaeology==
Approximately 400 prehistoric stone axes, known as Group 1 axes and made from greenstone, have been found all over Britain, which from petrological analysis appear to come from west Cornwall.〔Markham, M. & Floyd, P. A. (1998) "Geochemical Fingerprinting of West Cornish Greenstones as an aid to Provenancing Neolithic Axes". Read at the Annual Conference of the Ussher Society, January 1998〕 Although the quarry has not been identified, it has been suggested that the ''Gear'', a rock now submerged half a mile from the shore at Penzance, may be the site. A significant amount of trade is indicated as many have been found elsewhere in Britain.〔Pool, P. A. S. (1974) ''The History of the Town and Borough of Penzance.'' Penzance: The Corporation of Penzance.〕

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