The upper division of the Permian (Dyas) of Europe. The prevailing rock is a magnesian limestone.
zek'st[=i]n, n. a deposit of calcareous rock which covers the Kupfer-schiefer. [Ger.,--zeche, a mine, stein, a stone.]
[Ger.] (Geol.) To be cut through before the copper slate is reached ; the equivalent of the limestone of the Permian age, in north of England. See Zax.