The Equestrian Geological Survey is an Equestrian government body in charge of all geoscience study, not just within Equestria, but in the world. Its main offices are located in Canterlot, although it maintains field offices throughout the country, especially in areas with known geological or seismic activity. In addition to matters of safety, such as monitoring volcanoes and tracking fault lines for potential earthquakes, it's also responsible for testing and cataloging soil types and geological composition of populated areas, and for surveying and mapping geological formations such as mountains.