1. relating to the scientific description and classification of rocks
Usage: geological

Examples

• The geologist conducted a petrographic analysis of the volcanic samples.
• Petrographic studies revealed the mineral composition of the ancient rock formation.
• The research team used petrographic microscopy to examine the thin rock sections.
• Her petrographic work focused on identifying different types of sedimentary rocks.
• The petrographic data helped determine the age and origin of the geological specimens.
• Advanced petrographic techniques allowed scientists to study the rock’s internal structure.