This rock is a black and white banded rock with coarse crystals of biotite,quartz,and garnet.Foliation is associated with the folds.What is the correct name for this rock?

Question

Quizplus · Accepted Answer

The presence of banding, coarse crystals, and garnet is indicative of a metamorphic rock, and the association with folds suggests the presence of foliation. Gneiss is a metamorphic rock that commonly exhibits banding, coarse crystals, and foliation. Slate is typically finer-grained and lacks coarse crystals and garnet, while marble is a non-foliated metamorphic rock composed primarily of calcite. Greenstone is a term used to describe various types of igneous and metamorphic rocks that are green in color, but it does not fit the description provided for the rock in question.

This Rock Is a Black and White Banded Rock with Coarse