1. relating to geology or the physical structure and substance of the earth

Examples

• The geologic survey revealed valuable mineral deposits in the area.
• Scientists studied the geologic formations in the canyon.
• The museum displays geologic specimens from around the world.
• Geologic time spans millions of years.
• The earthquake was caused by geologic activity along the fault line.
• Researchers examined the geologic history of the region.
• The geologic map shows different rock layers and their ages.