Quartzite is metamorphosed from
- ALimestone
- BObsidian
- CSandstoneCorrect
- DShale
Explanation
Quartzite is a non-foliated metamorphic rock formed when quartz rich sandstone is subjected to high heat and pressure. During the process of metamorphism, the individual quartz grains in the sandstone recrystallize and fuse together into a dense, hard rock.
To clarify the other options: Limestone metamorphoses into Marble. Shale metamorphoses into Slate. Obsidian is an igneous rock and not a primary source for Quartzite.
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