Wednesday, 21 September 2016

VOLCANIC PLUG. Volcanic plug is formed by the solidification of lava in the vent of the volcano after eruption is over. The plug becomes clearly visible after the erosion of the upper rock material. Such volcanic plugs are found in large number in the Hawaiian Islands. Sometimes it is called volcanic neck also. It can have 300 to 600 meter radius. The Devil Tower in Wyoming is the best ex of a volcanic neck.

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