Metamorphic Rock vs Sedimentary Rock — Difference (with Table & FAQs)
Metamorphic Rock vs Sedimentary Rock compared side by side — a 5-row comparison table, 4 key points and 3 exam FAQs. Class 7-9 Science, free and no sign-up.
TL;DR: Metamorphic Rock vs Sedimentary Rock compared side by side — a 5-row comparison table, 4 key points and 3 exam FAQs. Class 7-9 Science, free and no si…
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The main difference between Metamorphic Rock and Sedimentary Rock: Metamorphic rock forms when existing rock is changed by heat and pressure deep in the Earth. Sedimentary rock forms from the compaction and cementation of
Metamorphic Rock vs Sedimentary Rock — Comparison Table
| Basis | Metamorphic Rock | Sedimentary Rock |
|---|---|---|
| Formation Process | Heat, pressure, and chemical change | Compaction and cementation of sediments |
| Location of Formation | Deep within Earth's crust | At or near Earth's surface |
| Parent Material | Any existing rock type | Weathered rock fragments |
| Examples | Marble, slate, gneiss | Sandstone, limestone, shale |
| Mineral Arrangement | Interlocking crystals from recrystallization | Visible layers and grain patterns |
Key Points
- Metamorphic rocks form from existing rocks under extreme heat and pressure
- Sedimentary rocks form from compaction and cementation of sediment
- Metamorphic rocks form deep underground while sedimentary rocks form near the surface
- Both are part of the continuous rock cycle
Frequently Asked Questions
How do metamorphic and sedimentary rocks form differently?
Sedimentary rock forms at or near the surface when sediments settle in layers and are compacted and cemented together. Metamorphic rock forms deep underground when an existing rock is changed by intense heat and pressure without melting.
Can a sedimentary rock become a metamorphic rock?
Yes, and this is common. Limestone becomes marble and shale becomes slate when buried deep enough to be subjected to heat and pressure. The rock does not melt; its minerals recrystallise in the solid state.
How can you tell them apart?
Sedimentary rocks often show visible layers and may contain fossils. Metamorphic rocks are usually harder and denser, frequently show bands or a sheeted texture, and rarely preserve fossils because heat and pressure destroy them.