Question

question 28
what rock commonly serves as a protolith for quartzite?
slate
sandstone
shale
limestone

Explanation:

Quartzite is a metamorphic rock. Sandstone, which is a sedimentary rock composed mainly of quartz - grains, commonly serves as the protolith (original rock before metamorphism) for quartzite. When sandstone undergoes metamorphism under heat and pressure, the quartz grains in sandstone recrystallize to form quartzite.

Answer:

B. Sandstone