Quartzite origin — UPSC Prelims PYQ 2001
Quartzite is metamorphosed from:
- Limestone
- Obsidian
- Sandstone
- Shale
Explanation
Option (c) is correct
- Quartzite is a hard, non-foliated metamorphic rock formed when quartz-rich sandstone undergoes recrystallization under intense heat and pressure.
Answer: (c) Sandstone
