Examkin

Question

Difficulty: EasyRock Types, Formation, and Economic Importance

Which of the following processes is primarily responsible for the formation of metamorphic rocks such as marble?

  1. Great heat and pressure acting on existing parent rocksAnswer
  2. B
    Compaction and cementation of accumulated organic sediments
  3. C
    Cooling and crystallization of molten magma beneath the Earth surface
  4. D
    In-situ disintegration of surface rocks caused by atmospheric agents

Answer

Great heat and pressure acting on existing parent rocks is responsible for the formation of metamorphic rocks.
Metamorphic rocks are created when existing rocks (such as limestone) are subjected to extreme heat and pressure beneath the Earth's crust, recrystallizing the minerals to form new textures (such as marble). Therefore, heat and pressure acting on existing parent rocks correctly describes this formation process.

Step-by-Step Solution

1
Identify the classification of the rock mentioned
Marble is classified as a metamorphic rock derived from limestone.
Determining the rock group clarifies its mode of origin.
2
Select the geological agent responsible for metamorphism
Intense heat and extreme pressure alter the mineral alignment and texture of existing rocks without melting them.
Metamorphic processes require high temperature and pressure within the crust.

Key Concept

Metamorphic Rock Formation
Rate this question

Topics

Rock Types, Formation, and Economic Importance

More questions from this topic