Geology Calendar 2025. Each month unveils a breathtaking photograph of active and dormant volcanoes from around the globe, paired with insightful details. In the ga shop, you may purchase ga field guides (a series of detailed, accessible and attractive field guides to both british and international sites of geological interest) and other.

Each month unveils a unique period of earth’s geologic history, featuring gorgeous artwork by rae ward. This geological 2025 calendar is more than just a calendar: