Large rock fragments that can be as large as a bus?

Large rock fragments that can be as large as a bus are typically referred to as "megaclasts." These massive pieces of rock can result from geological processes such as landslides, volcanic eruptions, or glacial movements. Their size and weight make them significant in studying geological formations and understanding the Earth's processes. Megaclasts can also influence local ecosystems and human infrastructure when they occur in populated areas.