One difference between wide & narrow craters is the presence of this to mix with magma & cause big steam explosions
Some volcanoes may exhibit only one characteristic type of eruption during... [DOC] [TLE] Caldera: Crater Formed by Volcanic Collapse or Explosion [PAR] They are large volcanic craters that form by two different methods: 1) an 
explosive ... What Causes Explosive Eruptions at Kilauea?