Petrogenesis
Encyclopedia
Petrogenesis, also known as petrogeny, is a branch of petrology
Petrology
Petrology is the branch of geology that studies rocks, and the conditions in which rocks form....

 dealing with the origin of igneous rocks. Petrology
Petrology
Petrology is the branch of geology that studies rocks, and the conditions in which rocks form....

 is the branch of geology
Geology
Geology is the science comprising the study of solid Earth, the rocks of which it is composed, and the processes by which it evolves. Geology gives insight into the history of the Earth, as it provides the primary evidence for plate tectonics, the evolutionary history of life, and past climates...

 dealing with the origin, occurrence, structure and history of igneous, metamorphic
Metamorphic rock
Metamorphic rock is the transformation of an existing rock type, the protolith, in a process called metamorphism, which means "change in form". The protolith is subjected to heat and pressure causing profound physical and/or chemical change...

, and sedimentary rocks.
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