Cinder cone volcanoes are the simplest type of volcano, formed from small fragments of lava that are ejected during eruptions. These fragments, called cinders, fall back to the ground around the vent, creating a steep, conical hill. Cinder cone volcanoes typically have a bowl-shaped crater at the top and can vary in height. These volcanoes usually erupt once and are often found on the flanks of larger volcanoes, such as shield volcanoes or stratovolcanoes. They can produce explosive eruptions, but the lava flows are generally short-lived. Famous examples include Paricutin in Mexico and Sunset Crater in Arizona.