nevado del ruiz

active activos alternan alternate andes ash belt between border caldas capas ceniza cinturón cloud colombia composed compuesto del departamentos departments endurecida estratovolcán fell field fields full grass grassland green hardened highland hill horizon landscape lava layers located límite mountain muchas más nature nevado northernmost other otros pastures piroclastos plain plateau pyroclasts que ridge ruiz sea septentrional sky stratovolcano that tolima ubicado volcanes volcanic volcanoes volcánica volcánico wilderness