Question

how are metamorphic rock formed
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Answer 1

Answer:

Earth movements can cause rocks to be deeply buried or squeezed. then, the rocks are heated and put under great pressure . They do not melt, but the minerals they contain are changed chemically, forming metamorphic rocks.

Answer 2

Formation of Metamorphic Rocks

1. Movements of Earth's crust causes Rocks to go underneath and are buried.
2. They are subjected to High Temperature and Pressure here.
3. As a result, some of Minerals they contain get transformed.

Example 1: Limestone turns to Marble

• When Limestone gets buried in layers of Earth and subjected to High Temperatures and Pressure, Its minerals grow Larger and Fuse together.
• Limestone re-crystallizes into a more denser rock with equal granules of calcite crystals to form Marble.

Example 2: Sandstone turns into Quartzite

• The sparkly quartz crystals in sandstone are fused with intense heat and pressure to become tightly inter grown and hard dense rock called Quartzite.