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[探索发现] 【整理】2010-05-23 黄石公园-3

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Rocks below ground, hit the water under pressure for around 90

minutes. Suddenly some water spurts through a tiny 5 inch wide

crack in the rocks. This causes a drop in the pressure with in

the water chamber. In an instant, thousands of gallons of water

are turned to steam and blusted up into the air. When the

pressure builds open up, steam up rise surface the system

depressionizes and follow eruption can occurred. Old Faithful

shows that 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 circluar lake called Indian

ponds. It's a few geologies, my job is to basiclly be erupted to

take it. And so I tried to determine what the origin is and what

the history is of that particular rock. There we go.
OK, now in this particular case, ( Let's look at this. ) this

rock, we need started there was just loose sand, you can just put

your fingers to it. The solid border is formed from millions of

individual grains of sand. Michael Scoppecan's analysis reveals

the grains have been cemented together by chemicals and pressure

deep under the ground. But how did the rock get to the surface?

Morgan have chemically ?? the rocks and discovered that 3000

years ago, the border was blusted under the ground by the hot

water explosion of a gigantic guyser. You will see boiling water,

rock fragment and fine medy material been injected up into the

air, as high as 3 to 5 thousand feet, and then at some point

material will stop raining down from this explosion column. Now

you wouldn't want to be standing next one of those.
Indian ponds is the crater that the gutser left behind.
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