What does petrological mean?
Petrological means relating to the scientific study of rocks, including their mineral composition, internal structure, origin, and processes of formation. The adjective is common in geology, petrology, and related fields, where researchers use it to describe analyses, observations, evidence, and physical properties. For example, a petrological comparison may reveal whether two rocks formed under the same conditions, while petrological evidence can help establish a geological history. Although the term is technical, it is also useful for emphasizing that knowledge of a rock comes from more than superficial appearance. It should not be confused with petrography, which places particular emphasis on the descriptive and microscopic examination of rocks rather than the broader scientific study of their formation and origin.
adjectiveRelating to petrology, the scientific study of the composition, structure, origin, and formation of rocks. It may also describe evidence, properties, or processes identified through the study of rocks.
- Relating to the scientific study of rocks, especially their composition, origin, and formation.
"The researchers used petrological analysis to determine how the unusual igneous rock had formed."
"Petrological evidence suggests that the meteorite underwent intense heating during atmospheric entry."
"The report presents a detailed petrological comparison of the two volcanic rock samples."
A single speck of rock can preserve a geological biography: its minerals and textures can reveal the temperatures, pressures, and environments that shaped it.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does petrological come from?
The word belongs to the English family formed from Greek petros, meaning “rock,” combined with the scholarly suffix -logy, derived from Greek logia, meaning “study of.” Petrology thus literally refers to the study of rocks, and “petrological” was formed as the corresponding adjective. Related English words include petrologist, a specialist in the field, and petrologic, the usual American spelling of the adjective.
Related word forms
How petrological is actually used
The adjective is chiefly used in technical geology and related earth sciences. “Petrologic” is the more common spelling in American usage, while “petrological” is standard in British usage.
Easily confused with petrological
Petrology studies the origin and formation of rocks, whereas petrography focuses especially on their descriptive and microscopic features.