Which one of the following statements with regard to volcanoes is not correct?

• Stratovolcanoes produce lava flows that initially follow valleys but are highly resistant to erosion.
• The surrounding areas can remain highlands, lava ridges or mesas.
• Hawaiian shield volcanoes are eroded by steams that form deeply carved valleys with steeply sloping heads.
• The system of streams on a dissected volcano cone is not a radial drainage pattern.