| 词条 | Blue John Cavern |
| 释义 |
| name = Blue John Cavern | photo = Blue John Veins in the Blue John Cavern.jpg | photo_caption = Blue John seams in the cavern | location = Castleton, Derbyshire England | depth = | length = | coords = {{Coord|53.3456|-1.8035|type:landmark_region:GB|display=inline, title}} | discovery = | geology = Blue John | difficulty = | entrance_count = 1 | access = }} The Blue John Cavern is one of the four show caves in Castleton, Derbyshire, England.[1] DescriptionThe cavern takes its name from the semi-precious mineral Blue John, which is still mined in small amounts outside the tourist season and made locally into jewellery. The deposit itself is about 250 million years old. The miners who work the remaining seams are also the guides for underground public tours. The eight working seams are known as Twelve Vein, Old Dining Room, Bull Beef, New Dining Room, Five Vein, Organ Room, New Cavern and Landscape. In 1865, Blue John Cavern was the site of the first use of magnesium to light a photograph underground. It was taken by Manchester photographer Alfred Brothers.[2] Blue John{{main|Derbyshire Blue John}}In the UK Blue John, or "Derbyshire Spar", is found only in Blue John Cavern and the nearby Treak Cliff Cavern. It is a type of banded fluorite. The most common explanation for the name is that it derives from the French bleu-jaune, meaning 'blue-yellow', but other derivations have been suggested.[3] In popular mediaThe cavern was featured on the 2005 TV programme Seven Natural Wonders as one of the wonders of the Midlands. In the 2010 series of How it's Made, the cave and jewellery production of Blue John was featured. Blue John Cavern is also visited by a couple in the 2013 film Sightseers. References1. ^{{cite web|url=http://www.castleton.co.uk/caverns/blue_john_cavern.aspx|title=Blue John Cavern|website=castleton.co.uk|publisher=Peak Hideaways|accessdate=22 Jan 2017}} 2. ^{{cite news|url=https://books.google.com/books?id=yINSqbNUNM0C&pg=PA14&lpg=PA14|title=Art of Darkness|author=Chris Howes|publisher=New Scientist|date=1989-12-23|accessdate=5 Jul 2014}} 3. ^{{cite book | title=An Gerlyver Meur: Cornish-English, English-Cornish Dictionary | first=Ken | last=George | year=2009 | publisher=Cornish Language Board | isbn=1-902917-84-7}} External links{{commons category|Blue John Cavern}}
5 : Caves of Derbyshire|Show caves in the United Kingdom|Tourist attractions in Derbyshire|Tourist attractions of the Peak District|Derbyshire Blue John |
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