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Tom Mazanec
2017-Dec-17, 05:58 PM
Not in the sense of "all the magma poured out and left the planet a hollow globe" but from geothermal heat cooling. Earth is already out of some lavas like komatiite rock lava, when will the other types join it in extinction?
I read that the outer core will "freeze" in 2.3 billion years (https://en.wikipedia.org/wiki/Timeline_of_the_far_future), will it happen then? Or later, because of some local Mantle phenomenon? Or sooner, because the outer core is too deep to send lava to the surface?

01101001
2017-Dec-18, 03:26 AM
I cannot say. I searched the Web with Google: When will the Earth run out of lava? (https://www.google.com/search?q=When+will+the+Earth+run+out+of+lava) and I couldn't understand a word of the results.

Jens
2017-Dec-18, 08:13 AM
I cannot say. I searched the Web with Google: When will the Earth run out of lava? (https://www.google.com/search?q=When+will+the+Earth+run+out+of+lava) and I couldn't understand a word of the results.

Same here.

Related question, though: when will the world run out of lava lamps?

Swift
2017-Dec-18, 02:59 PM
Thread closed pending moderator discussion.

Thread reopened. Let's keep the sarcasm out of the discussion

Glutomoto
2018-Jan-04, 02:17 AM
Maybe soon after the Earth and Moon are in orbital tidal lock ? Or at least soon after the moon is far enough away not to raise an earth tide ?

geonuc
2018-Jan-04, 10:20 AM
Not in the sense of "all the magma poured out and left the planet a hollow globe" but from geothermal heat cooling. Earth is already out of some lavas like komatiite rock lava, when will the other types join it in extinction?
I read that the outer core will "freeze" in 2.3 billion years (https://en.wikipedia.org/wiki/Timeline_of_the_far_future), will it happen then? Or later, because of some local Mantle phenomenon? Or sooner, because the outer core is too deep to send lava to the surface?

That Wiki page suggests that subduction will cease in 600 million years. Subduction is one of two major processes that generate surface lava (the other being mantle plumes that create hot spots).

The core does not 'send lava to the surface'. From your wording, I'm not certain if you think some lava (magma) derives from as deep as the core. Magma is generated from partial melting of the lithosphere and asthenosphere.

This Wiki page suggests the outer core will mostly solidify in 3-4 billion years.
https://en.wikipedia.org/wiki/Future_of_Earth

nota
2018-Mar-12, 09:12 PM
temporary set back by cooling and or running out of radioactive heating in the future

but then our sun expands and heats us up again
will that led to surface melting ? and surface lava ?

eburacum45
2018-Mar-16, 10:14 AM
temporary set back by cooling and or running out of radioactive heating in the future

but then our sun expands and heats us up again
will that led to surface melting ? and surface lava ?
Yes, it will. By the time the Earth heats up enough to have a molten surface, most of the water and atmosphere will have boiled away; so the quality of the melted rocks will be much different to the kinds of lava we are familiar with today.

I believe there is some doubt as to whether the Earth will be swallowed up by the Sun when this happens - it depends on the rate of mass-loss by the Sun, and friction with the solar wind, if I recall correctly. Maybe one of the real astronomers on this forum would have a better idea.

BigDon
2018-Mar-26, 03:45 PM
Eburacum, while there IS doubt, the smart money is betting on the "grim outcome".

They have to do too many headstands for the sims to let the predicted mass loss relax the orbit of Earth outside of the photosphere of the future red giant Sol. The future of even Mars is sketchy when you get dispassionate about the subject.

Earth is going to be a smudge of soot 7 billion of years from now.

Interesting enough Mars will start to get Earth-like insolation and surface temperatures 6.5 billion years from now, but then only has 1 billion years of these conditions before it's swallowed by the red giant Sol as well. The paper's authors express doubt as whether life will evolve in this time frame as Mars will be completely dead tectonically. But, more recent papers demonstrate that life on Earth formed incredibly soon after the surface of the Earth cooled enough to permit it, so they may be wrong about that.