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  2. Slate industry - Wikipedia

    en.wikipedia.org/wiki/Slate_industry

    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. In the remainder of Continental Europe and the Americas , Portugal , Italy , Germany , Brazil , the east coast of Newfoundland , the Slate Valley of ...

  3. Slate Belt - Wikipedia

    en.wikipedia.org/wiki/Slate_Belt

    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]

  4. Roofing slates - Wikipedia

    en.wikipedia.org/wiki/Roofing_slates

    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]

  5. List of quarries in the United States - Wikipedia

    en.wikipedia.org/wiki/List_of_quarries_in_the...

    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 ...

  6. Penrhyn quarry - Wikipedia

    en.wikipedia.org/wiki/Penrhyn_Quarry

    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 It has since been superseded in size by slate quarries in China, Spain ...

  7. Oakeley quarry - Wikipedia

    en.wikipedia.org/wiki/Oakeley_quarry

    In 1821, at the end of the initial three years, Holland took a further 21-year lease on the site, but he sold this in 1825 to the Welsh Slate Company which considerably extended the quarry. [3] The Welsh Slate Co.'s undertaking was the lowest on the mountain it became known as Lower Quarry - also known as Lord Palmerston's Quarry.

  8. Llechwedd quarry - Wikipedia

    en.wikipedia.org/wiki/Llechwedd_quarry

    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.

  9. Aberllefenni quarries - Wikipedia

    en.wikipedia.org/wiki/Aberllefenni_quarries

    Slate extracted from the narrow vein at Aberllefenni is deep blue and extremely hard and dense. It resists fine splitting, so most of the mines' product was large cut slabs rather than split roofing slates. Foel Grochan mine consists of eight near-horizontal tunnels at approximately 60 feet (18.3 m) vertical separation.