krakatoa+before+and+after

PHYSIOGRAPHY BEFORE AND AFTER THE 1883 ERUPTION
The pre-eruption island of Kratatau was composed of three coalsced volcanoes aligned along a north-northwest direction, parallel to the volcanoes on Sumatra. From north to south, these were Perboewatan, Danan, and Rakata.
 * [[image:http://www.geology.sdsu.edu/how_volcanoes_work/Images/Historic/Krakatau%20pre_eruption.jpg width="177" height="225" align="center" caption="Before Krakatau"]] || [[image:file:///Users/ajjammal/Library/Caches/TemporaryItems/moz-screenshot-3.png]][[image:file:///Users/ajjammal/Desktop/Krakatau%20post_eruption.jpg]][[image:Krakatau_post_eruption.jpg width="208" height="217"]] ||

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During the eruption, Perboewatan, Danan, and the northern half of Rakata appear to have collapsed into the vacating magma chamber forming a submarine and destroying the northern two-thirds of the island. Some workers, however, have argued for an alternative to the caldron-collapse model, and instead have suggested that the caldera formed by explosive destruction of the island, and the reaming out of the pre-eruption edifice. Eruptions since 1927 have built a new cone called Anak Krakatau in the center of the 1883 caldera. =====