All about this rock: slate .for the rock slate choose all the characteristics that apply.
be careful: there are a total of 5 correct answers. any incorrect answer will deduct one point from any correct one!
metamorphic
may contain calcite
non-visible minerals
foliated
may contain serpentine
may contain micas
non-foliated
formed by contact metamorphism
formed by regional metamorphism

Principal characteristics of a slate are:

It's a Metamorphic rock

As e metamorphic rock it is Foliated

It's origin is Regional metamorphism

Is a fine-grain rock, for that reason it has non-visible minerals

A slate is composed by principally by clay and Micas.

Explanation:

Slate rocks are fine-grain metamorphic rocks which original rock use to be a shale or a vocanic rock. It is foliated, becase of compression stress produced by regional metamorphism, it means, orogenic metamorphism common in compresive plate boundaries. The foliation are planes perpendicular to the stress direction. It has non visible minerals because of the size of it's original components; usually it comes from shales, sedementary rock with clay minerals that after metamorphism sometimes become micas.