Here's why:
* Petrology is the branch of geology that studies rocks.
* Petrologists specialize in understanding the origin, formation, composition, structure, and history of rocks.
* They use various techniques to analyze rock samples, including:
* Microscopy: To examine the mineral composition and texture of the rock.
* Chemical analysis: To determine the elemental and isotopic composition of the rock.
* Geochemical analysis: To study the processes that led to the formation of the rock.
So, while other geologists might be involved in collecting or studying rocks, it's the petrologist who focuses specifically on the composition of rocks.
