Petrogenesis, also known as petrogeny, is a branch of
petrology
Petrology () is the branch of geology that studies rocks and the conditions under which they form. Petrology has three subdivisions: igneous, metamorphic, and sedimentary petrology. Igneous and metamorphic petrology are commonly taught together ...
dealing with the origin and formation of rocks. While the word petrogenesis is most commonly used to refer to the processes that form igneous rocks, it can also include metamorphic and sedimentary processes, including
diagenesis and
metamorphic reactions.
Petrogenesis of an igneous rock comprises three successive stages: magma generation, magma differentiation and assimilation of crust.
[All in science Richmond]
References
Petrology
{{Petrology-stub
he:פטרולוגיה#פטרוגנזיה