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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 the water under pressure for around 19 minutes.Suddenly some water spurs through a tiny five inch crack in the rocks.These causes a drop in the pressure within a water chamber .In a instant thousnads of gallons of water turn to steam and blasted up into the air.

When the pressure builds up enough steam up the rise of the surface the system depressurizes then the follow eruptions can occur.

Old faithful shows that water below the surface are very hot.

Scientists find clues to a viloent the past 34miles southeast of the hot spring.On the shores of a circular lake called Indian ponds.

So few geologist ,My job is to bascially be a  rock detective and so I try to determine what their origin is and what the histroy is of that particular rock.There we go.In this particular case,Let's look at this, this rock just started ,it was just a loose sand/You can just put your fingers through it .

This soild border is formed from millions of individual grains of sand.Microscopic reviews the analysis  the grains beencemented  by chemicals and pressure deep under the ground .But how did the rock the surface ?Morgan has chemically dated the rock so discovered 3000 years ago,the border was blasted out of the ground by the hot water explosion of the gigantic geyser .

You would see boiling water rock fragments and fine muddy material .Being ejected into the air as highest 3 to 5 thousand feet and then at some point material started to rain down .From the explosion color .Now you wouldn't want to be standing next to one of those.

It is in ponds that creates that the gesyer left behind.
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