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[探索发现] 【整理】2010-05-23 黄石公园-3

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Hot rocks below ground heat water under pressure for abound 90 mins,suddenly some water spirts through a tiny 5 inch wide crack in the rocks.this causes a drop of pressure within the water chamber in an instance,thousands of gallons of water are turned to steam and blasted up into the air.once the pressure builds up enough,steam bubbles starts rising into the surface,the system deep pressure rises and the full eruption can occur.old faithful shows the surfaces are very hot.scientist find clues to a violent past 34 miles southeast of the hot springs on the shores of the circulate river calls Indian ponds.as a field geologist my job is basically a rock detective.ans so I try to determine what the origin is and what the history is that particular rock.there we go.ok,now,in this particular case.just look at this.this rock we need to start is just a loose sand,you can just put your fingers through it.the solid boulder is formed from thousand of individual sand.microsft analysist reveals the grains have been summoned together by chemicals and pressure deep under the ground.but how did the rock get to the surface?mogan has chemically dated this rock and discovered 3000 years ago the boulder was blasted out the ground by a hot water explosion of a gigantic geyser.you will see boiling water,rock fragments and fine muddy material being ejected up into the air as high as 3 to 5 thousand feet and then at some point material starts raining down from this explosion column.now you wouldn’t wanna stand next to one of those.indian pond is the creator of the geyser that left behind.
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