environments changing can cause layers of rock that are on top of each other to be of different kind
volcanic_rock is igneous_rock. sedimentary_rock is not rock. climate_change is temperature_change. alternative_rock is rock. metamorphic_rock is not rock. igneous_rock is not rock. volcanic_rock is not igneous_rock. climate_change is not temperature_change. alternative_rock is not rock. rock is not natural_building_material.