The science of rocks and minerals. Science deals with their origin, structure, composition and all descriptive visual and geologic observations and classifications.

The branch of Earth science dealing with the origin, occurrence, structure, and history of rocks, especially igneous and metamorphic rocks.

Petrology - The origin, occurrence, structure, and history of rocks.

That branch of GEOLOGY which treats of the scientific study of ROCKS.

(pe trahl' e jee) - A science dealing with the origin, history, occurrence, chemical composition, structure and classification of rocks.

(pe·TROL·o·gy). A branch of geological science which deals with the study of the origin, history, occurrence, structure, chemical composition, and classification of rocks.

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

It is a type of geology which deals with the formation, composition, and source of rocks.

The study of rocks, their origin, chemical and physical properties and distribution.

The study of the natural history of rocks, of their formation, composition, alteration and decay.

branch of geology that deals with the origin, composition, structure, and alteration of rocks - BACK

Earth science section dealing to the studies of rocks, mineralogical and chemical compositions, genesis.

An area of geology devoted to the study of rocks, including their physical properties, distribution, and origins.

Petrology is a field of geology which focuses on the study of rocks and the conditions by which they form. There are three branches of petrology, corresponding to the three types of rocks: igneous, metamorphic, and sedimentary. The word petrology itself comes from the Greek word "petra", meaning rock.