Question

which is a common nonfoliated rock?
marble
gneiss
sandstone
slate

Explanation:

Marble is a metamorphic rock that is non - foliated. Foliated rocks have a layered or banded appearance due to the alignment of minerals during metamorphism. Gneiss is a foliated metamorphic rock. Sandstone is a sedimentary rock. Slate is a foliated metamorphic rock.

Answer:

marble