Question

describe the changes in mineral components and texture of rocks due to changes in pressure and temperature(metamorphism)

Answer 1

Explanation:

In general, metamorphic rocks do not undergo significant changes in chemical composition during metamorphism. The changes in mineral assemblages are due to changes in the temperature and pressure conditions of metamorphism. ... This pressure and temperature environment is referred to as Metamorphic Facies.

Answer 2

Metamorphism is defined as the modification of mineral accumulation and quality that is caused by exposing a rock to conditions such as pressure, temperature, and chemical environments that differ from those under which the rock initially formed.

Explanation:

• Metamorphic rocks are formed through the conversion of pre-existing rocks.
• Metamorphism is a response to heat   pressure and fluids which makes minerals  unstable and therefore changing  into another mineral without changing their composition.
• During the rock cycle process, the sedimentary rocks are formed initially by weathering and erosion, then the metamorphic rocks are formed with the application of heat and pressure in the sedimentary rocks.
• When the metamorphic rock melt, it turns into magma which further results in igneous rocks.

The resulting metamorphic rocks are subjective to factors such as:  

1. Mineral composition of the parent rock
2. Composition of the fluid present
3. Amount of pressure and temperature during metamorphism

Examples: Slate, Marble, Quartzite