Mineral district
Defined in 1 dictionary — Black's (1910)
Black's Law Dictionary
Henry Campbell Black, M.A. · 1910
A term occasionally used in acts of congress, designating in a general way those portions or regions of the country where valuable minerals are mostly found, or where the business of mining is chiefly carried on, but carrying no very precise meaning and not a known term of the law. See U. S. v. Smith (C. O.) 11 Fed. 490.
Defined under Mineral in Black's Law Dictionary.