किस प्रकार की चट्टानों को 'प्राथमिक शैल' भी कहा जाता है क्योंकि इनका निर्माण सबसे पहले हुआ था?

Solid-solid diffusion, phase transitions, and recrystallization in response to heat and pressure are characteristic processes of:

Which of the following options is NOT an example of a metamorphic rock?

What is the plutonic (intrusive) equivalent of the volcanic rock rhyolite?