and metamorphic rocks, emphasizing the role of heat and pressure in rock formation. It concludes by highlighting the continuous cycle of rock formation and transformation beneath the Earth's surface.

Petrology is the study of rocks - igneous, metamorphic, and sedimentary - and the processes that form and transform them. Mineralogy is the study of the chemistry, crystal structure and physical ...

Sedimentary rocks are formed by small rock pieces which are transported by rivers and laid down in layers. Chalk is a sedimentary rock. Metamorphic rocks are formed when another rock is under heat ...

The last group of rocks is called metamorphic, because these rocks form when a lot of heat and pressure change existing rocks ...