1. plural of geology; the sciences or studies of the structure and composition of the Earth and rocks
Usage: typically used when referring to multiple geological studies, regional geology systems, or geology programs
2. the geological features or rock formations of different regions or areas
Usage: used to compare or discuss the distinct geological characteristics of multiple locations

Examples

• The geologies of the two continents are quite different.
• Students studied the geologies of various mountain ranges.
• The geologies of these islands reveal their volcanic origins.
• Different geologies require different mining techniques.
• The conference brought together experts in multiple geologies.