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Slate mines are found around the world. 90% of Europe's natural slate used for roofing originates from the Slate Industry in Spain. [1] The major slate mining region in the United Kingdom is the Lake district, with Honister slate mine being the last working slate mine, the only producers of the world famous Westmorland greenslate.
The world's biggest consumer of slate is France, followed by the UK, USA and Germany. In 2012, Spain produced more than 580,000 tonnes (570,000 long tons; 640,000 short tons) of slate worth about $380 million. This made it the largest slate producer in the world, followed by China and Brazil. [3]
E. L. Smith Quarry, in or near Graniteville, Vermont and Barre, Vermont. This is the world's largest "deep hole" granite quarry. It produces Devonian Barre granite. Graniteville is home of its owner, the 1885-founded Rock of Ages Corporation, since 2016 part of Polycor, Inc., the largest producer of marble and granite in North America ...
Jones founded Bangor, Pennsylvania and established several slate quarries. The industry continued to expand throughout the 19th century, reaching its peak production in 1903. [5] At its 19th century peak, the Slate Belt was the world's largest slate-producing region despite its relatively small geographic size, which is 22 square miles. [6]
The Penrhyn quarry is a slate quarry located near Bethesda, North Wales. At the end of the nineteenth century it was the world's largest slate quarry; the main pit is nearly 1 mile (1.6 km) long and 1,200 feet (370 metres) deep, and it was worked by nearly 3,000 quarrymen. It has since been superseded in size by slate quarries in China, Spain ...
Although only 3 workers were employed in 1825, by 1854 the quarry was producing significant amounts of slate; that year the enormous "Alma" open chamber at the top of Foel Grochan was named after the Battle of the Alma. [2] By 1850, the quarry was owned by Colonel Robert Davies Jones, and was trading under the name Aberllefenni Slate Quarries. [3]
Llechwedd quarry (Welsh pronunciation: [ɬɛχˈwɛð]) is a major slate quarry in the town of Blaenau Ffestiniog, north Wales. At its peak in 1884 it produced 23,788 tons of finished slate per year and had 513 employees. It continues to produce slate on a limited scale and is the location of the Llechwedd Slate Caverns tourist attraction.
[1] [2] The quarries have produced a characteristic blue-grey slate for over 450 years, with large-scale production starting in the early 19th century, when the Cavendish family organised small-scale quarrying activities by local farmers into a larger group of quarries, which then attracted others into the area to live and work in the quarries ...