Igneous and Metamorphic Rocks: Foliated and Nonfoliated Metamorphic Rocks

The video tutorial discusses slate, a metamorphic rock used for roofing, derived from shale. It explains how slate's foliation, caused by heat and pressure, makes it ideal for roofs. The video contrasts foliated rocks like slate and schist with non-foliated rocks like marble, highlighting differences in structure and breakage patterns.

What is the term used to describe the arrangement of grains in slate?

How do non-foliated rocks like marble differ from foliated rocks like slate?