Context: This is a piece of phyllite. The word phyllite comes from the Greek word for leaf. The rock usually has a greenish color.
Phyllite can form when a metamorphic rock called slate is changed by high temperature and pressure. Phyllite is made of minerals such as quartz and mica.
What type of rock is phyllite?
A. igneous
B. sedimentary
C. metamorphic
From the given choices, choose the correct answer and respond with the letter of that choice.
Answer: C