This hard rock contains sand-sized grains of quartz.Fractures cut across,not around the sand grains.What is the correct name for this rock?
A)schist
B)slate
C)gneiss
D)quartzite

Question

This hard rock contains sand-sized grains of quartz.Fractures cut across,not around the sand grains.What is the correct name for this rock? 
A)schist 
B)slate 
C)gneiss 
D)quartzite

Quizplus · Accepted Answer

The presence of sand-sized grains of quartz and fractures cutting across the grains are indicative of a hard, quartz-rich rock that has undergone significant deformation and metamorphism. Therefore, the correct name for this rock is quartzite.

This Hard Rock Contains Sand-Sized Grains of Quartz