Metamorphic Rocks

Question 1

What is metamorphism?

Answer 1

The alteration of rocks in solid state due to heat, pressure, and/or chemically active fluids.

Question 2

What are the agents of metamorphism?

Answer 2

Heat, pressure, and fluids.

Question 3

Does metamorphism involve melting?

Answer 3

No — the rock remains solid throughout the process.

Question 4

What is regional metamorphism?

Answer 4

Large-scale metamorphism caused by high pressure and temperature during mountain building (e.g., convergent boundaries).

Question 5

What is contact metamorphism?

Answer 5

Localized metamorphism from heat of nearby magma intrusions, affecting surrounding rock (baked zones).

Question 6

What is hydrothermal metamorphism?

Answer 6

Alteration of rocks by hot, chemically active fluids, often at mid-ocean ridges.

Question 7

What is burial metamorphism?

Answer 7

Low-grade metamorphism from deep burial over time under thick sediment layers.

Question 8

What is shock metamorphism?

Answer 8

Occurs due to high pressure from meteorite impacts, creating unusual minerals like coesite or shocked quartz.

Question 9

What is foliation in metamorphic rocks?

Answer 9

Alignment of minerals into parallel planes due to pressure — gives layered appearance.

Question 10

Name a foliated metamorphic rock.

Answer 10

Slate, schist, or gneiss.

Question 11

Name a non-foliated metamorphic rock.

Answer 11

Marble or quartzite.