What does "taconite" mean?

A low-grade flint-like iron ore containing 20-30% iron.

Taconite

Common synonyms include: concentrate pellet, iron bearing rock, iron ore reserve, iron ore rock, low grade ore, mineral resource.

noun

noun ·Rare ·Advanced level

Noun

1
A low-grade flint-like iron ore containing 20-30% iron. countable, uncountable
2
a variety of chert containing magnetite and hematite; mined as a low-grade iron ore wordnet

From Taconic + -ite, after the Taconic Mountains. The name Taconic is from a Lenape language.