中文翻译与英英解释 | a variety of chert containing magnetite and hematite; mined as a low-grade iron ore
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| Taconite is a variety of iron formation, an iron-bearing (>?15% iron) sedimentary rock, in which the iron minerals are interlayered with quartz, chert, or carbonate. Newton Horace Winchell, the Minnesota State Geologist, coined the term during his pioneering investigations of the Precambrian Biwabik Iron Formation of northeastern Minnesota. |
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