noun
- a scientist who studies the composition, structure, and origin of rocks
Usage: geology
Examples
- The petrographer examined thin sections of granite under a microscope.
- As a petrographer, she specialized in identifying volcanic rocks.
- The museum hired a petrographer to analyze their mineral collection.
- The petrographer’s report revealed the age of the sedimentary layers.
- Field work is essential for any petrographer studying igneous formations.
- The petrographer used polarized light to study the rock’s crystal structure.