Petrology vs. Petrogenesis — What's the Difference?

Petrology (from the Ancient Greek: πέτρος, romanized: pétros, lit. 'rock' and λόγος, lógos) is the branch of geology that studies rocks and the conditions under which they form. Petrology has three subdivisions: igneous, metamorphic, and sedimentary petrology.

Petrogenesis, also known as petrogeny, is a branch of petrology 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.

The branch of science concerned with the origin, structure, and composition of rocks.

The branch of petrology that deals with the origin of rocks, especially igneous rocks.

The branch of geology that deals with the origin, composition, structure, and alteration of rocks.

The branch of petrology dealing with the origin of igneous rocks.

(geology) The study of the origin, composition and structure of rock.

The department of science which is concerned with the mineralogical and chemical composition of rocks, and with their classification: lithology.

A treatise on petrology.

The branch of geology that studies rocks: their origin and formation and composition