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Slate is mainly composed of the minerals quartz, illite, and chlorite, which account for up to 95% of its composition. The most important accessory minerals are iron oxides (such as hematite and magnetite), iron sulfides (such as pyrite), and carbonate minerals.
Ninety percent of Europe's natural slate used for roofing originates from the slate industry in Spain, [1] with the region of Galicia being the primary production source. In Galicia, the larger slate production companies are concentrated in Valdeorras in Ourense, with other important sites being situated in Quiroga, Ortigueira and Mondoñedo.
The wood is Leicestershire's most important ancient woodland for nature conservation. [6] Quarries within the wood were a source of the distinctive Swithland Slate roofs found on many local buildings as well as the slate gravestones common in Leicestershire churchyards.
Alun Richards comments on the importance of the slate industry: It dominated the economy of the north-west of Wales, where, by the middle of the 19thC. it accounted for almost half the total revenues from trade, industry and the professions, and in Wales as a whole, its output value compared with that of coal.
The slate industry of Snowdonia was once of world importance. Purple and green slates of Cambrian age were worked at vast quarries on the flanks of Snowdon and at Bethesda , Dinorwig , Corris and Blaenau Ffestiniog .
World Nature Conservation Day [98] [99] [100] July 28 International Tiger Day: July 29 World Ranger Day – International Ranger Federation: July 31 International Clouded Leopard Day [101] August 4 International Moon Bear Day: August 8 World Lion Day [102] August 10 World Elephant Day: August 12 World Hirola Day [103] August 12 International ...
Few important names in slate are Jak Black, Silver Shine, Silver grey, Panther, Deoli Green, Peacock, Peacock Multi, Kund Black, Kund Multi, and so on. Being to some extent fragile in nature, it is good for interior use only and can be used in even as a washboard.
It is home to a number of National Nature Reserves (NNRs), sites of special scientific interest (SSSIs), five areas of outstanding natural beauty (AONBs) and three national parks. Wales has many protected areas including three national parks: Snowdonia, Brecon Beacons and Pembrokeshire Coast.