Consider the following statements regarding metamorphic rocks : 1. Ortho-metamorphic rocks are formed from igneous rocks. 2. Intense heat of the intruding magmas results in metamorphism of the surrounding rocks, a process known as dynamic metamorphism. Which of the statements given above is/are correct ?

Statement 1 is correct: Metamorphic rocks are classified based on the nature of their parent material. Ortho-metamorphic rocks are formed from the metamorphism of igneous rocks (e.g., granite transforming into gneiss). Conversely, Para-metamorphic rocks are those derived from sedimentary rocks (e.g., shale transforming into schist).

Statement 2 is incorrect: The process described, where intense heat from intruding magma results in the metamorphism of surrounding rocks, is known as Contact (or Thermal) Metamorphism. Dynamic Metamorphism (also called cataclastic metamorphism) occurs primarily due to high pressure and mechanical stress, typically along fault zones where rocks are crushed and ground due to tectonic movements, with heat playing a minimal role.

• Contact Metamorphism: Driven by high temperature.
• Dynamic Metamorphism: Driven by high pressure/stress.
• Regional Metamorphism: Driven by both high temperature and pressure over large areas.