Placer mines
Defined in 1 dictionary — Ballentine's (1916)
Ballentine's Law Dictionary
James A. Ballentine · 1916
Those in which the mineral is generally found in the softer material which covers the earth’s surface, and not in the rocks beneath. See 116 U. S. 687, 29 L. Ed. 774, 6 Sup. Ct. Rep. 601.