- any of a class of crystalline metamorphic rocks whose constituent mineral grains have a more or less parallel or foliated arrangement.
Origin of schist
Examples from the Web for schist
Here and there are mixtures of schist, gneiss, and porphyry.The Rocky Mountain Wonderland
Enos A. Mills
General view of junction of granite and schist of the Valorsine.A Manual of Elementary Geology
The hills which bound the valley of the creek are basalt, sandstone, and schist.Journals of Australian Explorations
A C and F T Gregory
There the vein had failed, between the schist and the tertiary sandstone.The Underground City
I think that would be schist about as good as anything you could do.Remarks
- any metamorphic rock that can be split into thin layers because its micaceous minerals have become aligned in thin parallel bands
Word Origin and History for schist
type of layered metamorphic rock, 1795 (earlier schistus, c.1600), from French schiste (16c.), from Latin schistos lapis "stone that splits easily" (Pliny), from Greek skhistos "divided, separated," from skhizein "to split" (see shed (v.)). The rock splits easily in layers. Liddell and Scott says Greek skhistos lithos was "probably talc."
- A highly foliated, medium-grained metamorphic rock that splits easily into flakes or slabs along well-defined planes of mica. The mineral composition of schist is varied and is often reflected in the name given to the rock. For example, a schist that contains garnet is called a garnet schist. A schist containing chlorite is called a chlorite schist.