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What are mud volcanoes?

  • Written by Michael R. Hudec, Senior Research Scientist at Bureau of Economic Geology, The University of Texas at Austin
What are mud volcanoes?Engineers have tried to corral a mud volcano in Indonesia that has covered more than 1,700 acres with mud.Eka Dharma/AFP via Getty Images

Rice farmers living in Sidoarjo Regency, Indonesia, awoke to a strange sight on May 29, 2006. The ground had ruptured overnight and was spewing out steam.

In the following weeks, water, boiling-hot mud and natural...

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