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| From: | Moi (h75.180.72.24.cable.angl.cablerocket.net)
| | Subject: | Volcanic Mud in Indonesia | |
Date: | December 2, 2007 at 1:29 pm PST |
ABC story:Children walk in the volcanic mud that partly submerged houses in Monbon village, October 18, 2007, following heavy rains in the area of Bulusan volcano in the eastern Philippines province of Sorsogon. Continuous rain dislodged fine sand on the mountain's southeastern slope and carpeted the villages of Monbon and Cogon sending some villagers to flee the mudslide. The 5,145-foot mountain, one of 22 active volcanoes in the country, has spewed ash 26 times since March last year. (Charism SAYAT/AFP/Getty Images) One reader commented that the mud must be due to Global Warming, or the excess gasoline consumption of his Yukon...;-)
These mud eruptions are actually called Mud Volcanoes. I have seen one on the coast of Columbia. Very wet clays are quickly buried in a subduction zone (where a depositional basin is actively sinking and acrueing sediments. The very wet sediments are geologically trapped, and not able top "dewater". When a sufficient amount of weight of overburden accrues, and a crack developes in the overlying burden, the mud oozes out of containment to the surface. The Geolgically notorious "Baong Clay" is in the subsurface on the East side of the Island. I suspect the Baong Clay to be behind this story. It is a real challenge to drillers.
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