1. the scientific study of the Earth’s physical structure, substance, history, and the processes that act on it
2. the geological features and processes of a particular area

Examples

• She decided to major in geology because she was fascinated by rocks and minerals.
• The geology professor explained how mountains are formed over millions of years.
• Understanding the geology of the region is crucial before building the dam.
• The geology of this area includes limestone caves and underground rivers.
• Students collected rock samples to study the local geology.
• His knowledge of geology helped him identify valuable mineral deposits.
• The geology textbook covered topics from plate tectonics to fossil formation.