Term: flookan (mining)
Definition:
A soft clayey substance which is generally found to accompany the cross courses and slides, and occasionally the lodes themselves, but when applied to a vein, means a cross course or vein of clay.
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[Source: "Glossary of Miners' & Mineral Terms" in St. John, John R. A True Description of the Lake Superior Country ... (New York, W. H. Graham, 1846).]
