Krakatau Volcanic Islands, Nestled between the super Indonesian islands of Java and Sumatra is the Krakatoa Volcano National Park. In the fourth century, a azygos marine cleft stood at this site, but in 416 A.D., the caldera of the cleft collapsed. The remnants formed a new caldera, or extrusive feature formed by the collapse of realty mass an eruption, around 7 km in diameter, with the peak’s remnants becoming the three islands of Verlaten, Lang and Krakatau.
