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For all the activity of the tectonic plate related volcanos and "hot spots" found today, the past, perhaps with more mantle heat (more radioactive heat) are quite modest when compared with a much younger earth.

"One such large granite body, the 2.62 billion-year-old Wyoming batholith, extends more than 125 miles across central Wyoming." A magma chamber that size, the extent of which and composition of which is preserved in this batholith, is one of many monstrous granite formations that give evidence to the violence of earth's past.

1 posted on 06/04/2016 11:13:08 AM PDT by JimSEA
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To: JimSEA

One hopes.


2 posted on 06/04/2016 11:16:28 AM PDT by Jim W N
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To: JimSEA

Uh, thermodynamics says the Erf is still cooling, for billions of years.....


3 posted on 06/04/2016 11:23:09 AM PDT by Paladin2
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To: JimSEA

Thank goodness for transgendered single-mother bears who are not afraid of discrimination any more. No more “Yogi”.

The correct names are:

Disgi
Whoopgi
Yobian
Cisgi, and
Yodude


7 posted on 06/04/2016 12:17:39 PM PDT by Attention Surplus Disorder (I apologize for not apologizing.)
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To: JimSEA
explosive volcanism may have been far more abundant in Earth's past than it is today

Isn't this well known?

From "The seven ages of a planet," 1975, William M. Kaula (1926-2000), Australian-born American geophysicist and professor at the University of California, Los Angeles.

On the basis of almost universally held assumptions concerning the formation of the planets and the isolation of the solar system from outside influences it follows rather plausibly that all terrestrial planets pass in principle through seven stages. The processes involved include the solidification of grains from gas in the condensation stage, planetesimal interactions, and formation processes. Vigorous convection processes lead to the gravitational separation of iron and the outgassing of oceans. Other stages are related to plate tectonics and terminal volcanism. The ultimate stage of quiescence is characterized by a thick lithosphere and no volcanism.

If only leftists would go into an "ultimate stage of quiescence." But I don't think the universe will last long enough for that to happen.

9 posted on 06/04/2016 12:27:28 PM PDT by ProtectOurFreedom
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To: JimSEA

Global warming is killing the volcanoes.

We must save them by crushing SUVs, killing the coal industry, and using George Soros’ railroads whenever possible.


12 posted on 06/04/2016 1:02:14 PM PDT by chrisser
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To: JimSEA

Many are familiar with the Cascadia Subduction zone now in the news, where an ocean floor plate off the Pacific northwest coast is sliding under North America. As it does so, magma forms under the above Cascade mountain ranges with the result that volcanoes, like pimples, erupt from the chamber of magma below.

Those chambers of magma under the mountains are extensive and interconnected across an area of nearly a thousand miles from the Canadian Cascades down to Mt.Lasson in California.

For those who do not know, magma which never reaches topside in an eruption and is later found exposed by erosion, becomes granite (such as the batholith in Wyoming and much of the Sierra Nevada mountains in California.)


17 posted on 06/04/2016 2:06:08 PM PDT by SatinDoll (A NATURAL BORN CITIZEN IS BORN IN THE USA OF TWO USA CITIZENS)
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