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A variety of chert containing magnetite and hematite, mined as an iron ore.

[After the Taconic (Mountains).]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


(Geological Science) a fine-grained sedimentary rock containing magnetite, haematite, and silica, which occurs in the Lake Superior region: a low-grade iron ore
[C20: named after the Taconic Mountains in New England]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


(ˈtæk əˌnaɪt)

an iron-bearing chert mined as low-grade iron ore in the Mesabi Range.
[1890–95, Amer.; after the Taconic Range in New York and Massachusetts; see -ite1]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.taconite - a variety of chert containing magnetite and hematite; mined as a low-grade iron ore
chert - variety of silica containing microcrystalline quartz
iron ore - an ore from which iron can be extracted
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
References in periodicals archive ?
recently[2] considered the applicability of large wheel loaders (Caterpillar 994 class) against cable shovels as primary loading machines and included visits to taconite mines in Minnesota and gold mines in Nevada.
This has been achieved by such measures as installing taconite dust seals and separate lubricating systems on all critical bearings, eliminating belt drives and introducing direct drives wherever possible, and fitting dust covers at all appropriate points.
Four WF500s (500 hp) are in operation at Phelps Dodge's Chino mine to deal with oversize copper ore prior to fine grinding; two WF400s at Amax Gold's Sleeper mine were commissioned in October 1990 for primary 'grinding' of gold ore; one WF500 was recently commissioned at Amax Gold's Haydon Hill mine, and soon afterwards a WF300 was started up by Hibbing Taconite to deal with trommel oversize iron ore.
Pellets production in Mt, with annual capacity in brackets, for operations managed by Cliffs was: in Michigan, Empire 5.4 (8.1) and Tilden 4.0 (8.1); in Minnesota, LTV Steel Mining 8.1 (8.1) and Hibbing Taconite 8.4 (8.6); in Canada, Wabush mines in Newfoundland and Quebec 5.8 (6.1); and in Australia, Savage River Mines 2.2 (1.3).