Quote:
Originally Posted by roysloco
WOW!! Those are some pretty LARGE numbers - I'm not sold out on either position here, but I'm curious as to how solid those times are? How do you know they're correct and not based on some (possibly 'flawed') assumptions? Is it at all possible that they're wrong (and let's not get all religious about it - it's not beyond questioning  )? |
This thread is not dead
I see that we can test lunar cycles with sedimentary tidal data but find it hard to believe we can check daily rotational times 50 million years ago.
However what the lunar data proves is that the Earth mass has NOT grown over time as the Neal Adams camp propose therefore very supporti6ve of the notion that we are talking simple phase change here not mass-from-the-ether.
Not saying this is definitely right but the simplest phase change would be neutrons > hydrogen
Are we sure Earth's core was not capable of holding condensed matter until the planet matured/cooled a bit? Geared to temp and pressure? We don't really know for sure what is down there now.
Quote:
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Most of Earth's structure is theoretical, being based on extrapolations of physical evidence which has come from the first few kilometres of Earth's surface, samples brought to the surface from deeper depths by volcanic activity, and analysis of seismic waves that pass through it.
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http://en.wikipedia.org/wiki/Structu...h#cite_note-12
Certainly we can make a decent stab at P from mass/gravity measurement, but T?
Quote:
Question:
How hot is the Earth's core, approximately, and how can it be measured?
kathleen n mecham
Answer:
There is no way to measure the temperature at the Earth's core
directly. We know from mines and drill holes that, near
the surface of the Earth, the temperature increases by about
1 degree Fahrenheit for every 60 feet in depth. If this
temperature increase continued to the center of the Earth, the
Earth's core would be 100,000 degrees Celsius!
But nobody believes the Earth is that hot; the temperature increase
must slow down with depth and the core is probably
about 3000 to 5000 degrees Celsius.
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http://www.newton.dep.anl.gov/askasc...9/gen99256.htm
my emphasis
why must it slow down with depth?
Why assume 7000 deg C?
What would be the consequence of a core many times hotter than current estimates for matter down there? Could matter be collapsed or supercondensed? Is there a big fission reactor down there?
Plenty to chew on