| 翻訳と辞書 |
| knotenschiefer ： ウィキペディア英語版 |
knotenschiefer
Knotenschiefer is a variety of spotted slate characterized by conspicuous subspherical or polyhedral clots that are often individual minerals such as cordierite, biotite, chlorite, andalusite and others.〔Bucksch, Herbert (1997). ''Dictionary of Geotechnical Engineering'', Vol. 2., Springer-Verlag, Berlin. ISBN 3-540-58163-4.〕
Like fleckschiefer, fruchtschiefer and garbenschiefer, knotenschiefer is a variety of contact metamorphic slate. It is formed at temperatures of around 400 °C and its dark coloration is caused by graphite. Fruchtschiefer occurs at 500 °C. Knotenschiefer is characterised by small nodules, up to one centimetre in size, and nodular deposits of mica as a result of the growth in grain size during metamorphism. The nodules consist of iron minerals, carbon substances and mica; as the metamorphic temperature rises, minerals such as andalusite or chiastolite increasingly occur.
==References==
* Walter Maresch, Olaf Medenbach: ''Steinbachs Naturführer. Gesteine.'' S. 252. Mosaik Verlag, München 1987, ISBN 3-576-10699-5.
* (''Fleckschiefer.'' ) Otto Lueger: ''Lexikon der gesamten Technik und ihrer Hilfswissenschaften.'' Bd. 4, Stuttgart, Leipzig 1906, S. 82.
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「knotenschiefer」の詳細全文を読む
スポンサード リンク
| 翻訳と辞書 : 翻訳のためのインターネットリソース |
Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.
|
|