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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]
The Slatington Slate Trade report for January 4 of 1880 showed that quarries in the town of Slatington alone had shipped 81,402 squares of roofing slates (over 8 million square feet) as well as 40,486 cases of school slates and 243 cases of blackboards. The Slate Valley (the district of Granville, New York) is well known
Aberllefenni was the last working slate mine south of Blaenau Ffestiniog. However, by 2002 it was no longer economical to extract slate at Aberllefenni and the mine closed in 2003. [6] The slate mill continues to operate, processing slate imported from Blaenau Ffestiniog, Penrhyn and China. Small pieces of Aberllefenni slate are still available ...
Slate can be made into roofing slate, a type of roof tile which are installed by a slater. Slate has two lines of breakability—cleavage and grain—which make it possible to split the stone into thin sheets. When broken, slate retains a natural appearance while remaining relatively flat and easy to stack.
Collyweston stone slate is a traditional roofing material found in east-central England, primarily in Northamptonshire, Cambridgeshire, Lincolnshire, and Rutland. [ 1 ] Collyweston quarry at Duddington Collyweston roofs on the Round Church, Cambridge
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Archaic period double-notched butterfly bannerstone from Ohio, ca. 2000 BC.Made of banded slate, a material frequently used in bannerstone manufacture.Bannerstones were used in North America for some 3,000 years beginning in the fourth millennium BC. [1]
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