Origin of rock salt
Examples from the Web for rock-salt
Magnesian limestone, gypsum, and rock-salt, occur among the superior strata of this group.A Manual of Elementary Geology|Charles Lyell.
A piece of rock-salt left there as well will never be amiss.Riding for Ladies|Mrs. Power O'Donoghue
Rock-salt is found in most parts of the world, in beds of very various ages.Falling in Love|Grant Allen
Lakes similar to these are also found in regions abounding in rock-salt deposits; the Jura range offers many such lakes.
It is no very strange thing in these hills that a piece of rock-salt should be lying within a foot of a diamond.