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The Asbestos Mountains is a range of hills in the Northern Cape province of South Africa, stretching south-southwest from Kuruman, where the range is known as the ''Kuruman Hills'', to Prieska. The range lies about 150 km west of Kimberley and rises from the Ghaap Plateau. The mountains were named for 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 jaspers and quartzites rich in magnetite and brown iron-ore. Geologically it belongs to the Griquatown series. The Griquas, for whom Griquatown was named, were a Khoikhoi people who in 1800 were led by a freed slave, Adam Kok, from Piketberg in the western Cape to the foothills of the Asbestos Mountains where they settled at a place called Klaarwater. John Campbell, (1766–1840), a Scottish missionary in South Africa, renamed it Griquatown in 1813. The mission station became a staging post for expeditions to the interior - here David Livingstone met his future wife, Mary Moffat, daughter of the missionary Robert Moffat - William Burchell visited here in 1811. John Campbell described the mountains in his book ''"Travels in South Africa: Undertaken at the request of the Missionary Society"'': The colour variants which Campbell found, are named, because of their chatoyance, ''"Tiger's Eye"'', ''"Hawk's Eye"'', and ''"Cat's Eye"'' by lapidaries and are silicified crocidolite.〔http://www.quartzpage.de/eyes.html〕 Wonderwerk Cave is located in the range near Kuruman and was occupied by man during the Later Stone Age, while much earlier manuports, introduced by hominins in the terminal Acheulean, have been found at the back of the cave.〔http://www.informaworld.com/smpp/content~content=a917484491&db=all〕 ==Mining history== Serious mining of crocidolite in these mountains started in 1893 when open-cast quarrying produced 100 tons of material. By 1918 underground mining had started and scattered mines were to be found from Prieska to Kuruman along the length of the range, and mills were constructed at both of these towns. Between 1950 and 1960 production had risen to 100,000 tons, each mine was doing its own milling and the tailings dumps had grown in size.〔Google Books - ''Mesothelioma'' by Bruce W. S. Robinson, A. Philippe Chahinian〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Asbestos Mountains」の詳細全文を読む スポンサード リンク
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