Lode rocks are a type of rock that contain ore deposits, such as gold, silver, copper, and other minerals. They are formed when hot fluids move through cracks in the Earth's crust, depositing minerals along the WAY. The term 'LODE' is derived from the Old English word for 'WAY' or 'COURSE, ' referring to the path of the hot fluids. Ores are minerals that can be mined and processed for their valuable elements.