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[探索发现] 【整理】2010-05-23 黄石公园-3

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Homework
Hot rocks below ground heat the water under pressure for around ninteen minutes.Suddenly some water spurs throw a tiny five inch wide crack in the rocks. This causes the drop in the pressure with  in the water chamber.In a instant ,thousands of gallons of water are turned to steam and blust it up into the air.
"When the pressure build up enough,steam bubbles start rising to the surface the system deep pressure arises and the follow erruption can occur"
Old faithful shows that the rocks below the surface are very hot.Scientists find clues to a violent past 34 miles southeast of the hot springs,on the shores of a circula lake called Indian Ponds.
"Surfuologist,my job is to basically be a rock detective,and so i try to determine what the origin is and what the history is of that particular rock"
"here we go"
"ok,now in this particular case,let`s look at this,this rock,we needs to start it was just a loose sand, you can just put your fingers to it"
The solid boarder is form from millions of individuals grands of sand.Micheal Skopacan`s analysist reviews the grand have been cemented together by chemicals and pressure deep under the ground.But how did the rock get to the surface.Morgan has chemically dataed the rock and discovred that 3000 years ago the borader was blasted out of the ground by the hot water explosion of a gigantic gizer.
"you would see boiling water,rock fragments and fine muddy materials been ejected up into the air as high as 3 to 5 thousand feet ,and then is some point,materials would start rainning down from this explosion column.now,you wouldnt wanna be standing next to one of those"
Indian ponds is the creator that the guys are left behind.
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