taconite | หินแทโคไนต์ [ธรณีวิทยา๑๔ ม.ค. ๒๕๔๖] |
taconite | (n) a variety of chert containing magnetite and hematite; mined as a low-grade iron ore |
taconite | หินแทโคไนต์ [ธรณีวิทยา๑๔ ม.ค. ๒๕๔๖] |
taconite | (n) a variety of chert containing magnetite and hematite; mined as a low-grade iron ore |