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Asbestos (/ æ s ˈ b ɛ s t ə s, æ z-,-t ɒ s / ass-BES-təs, az-, -toss) [1] is a group of naturally occurring, toxic, carcinogenic and fibrous silicate minerals.There are six types, all of which are composed of long and thin fibrous crystals, each fibre (particulate with length substantially greater than width) [2] being composed of many microscopic "fibrils" that can be released into ...
[16] [20] The site continued to be productive and by 1977 South Africa was the world's third-largest supplier of asbestos, extracting 390,000 tonnes (380,000 long tons) that year. [13] Amid growing concern over safety in the wider world Cape sold the mine and mill (which were closed shortly afterwards) in 1979, though it retained an interest in ...
The fibrous forms of riebeckite are known as crocidolite and are one of the six recognised types of asbestos. Often referred to as blue asbestos, it is considered the most hazardous. The association between blue asbestos and mesothelioma was established by J. C. Wagner, C. A. Sleggs, and P. Marchand by 1960. [7]
The mountains were named after the asbestos which was mined in the 20th century and is found as a variety of amphibole called crocidolite. Veins occur in slaty rocks, and are associated with jasper and quartzite rich in magnetite and brown iron-ore. Geologically it belongs to the Griquatown series. [citation needed]
During World War II, communications with England became difficult, and de Berrales acquired an interest in the mines. In 1943, the Colonial Sugar Company, through its subsidiary, Australian Blue Asbestos Ltd., took over both the Wittenoom and Yampire Mines. Lang Hancock, who watched his station property transform to a town, stated in 1958 ...
The ban of chrysotile asbestos, the only form of asbestos currently used in or imported to the United States, comes after the EPA under the previous Trump administration delayed banning the substance.
These timelines of world history detail recorded events since the creation of writing roughly 5000 years ago to the present day. For events from c. 3200 BC – c. 500 see: Timeline of ancient history; For events from c. 500 – c. 1499, see: Timeline of post-classical history; For events from c. 1500, see: Timelines of modern history
Archaeologists have discovered a mask mold believed to depict Medusa at Valley of the Temples Archaeological Park in in Sicily, Italy. The park is open to visitors on weekdays.