Re: Searching for Theia, the mother of the Moon

N:dlzc D:aol T:com (dlzc) wrote:
"Yousuf Khan" <bbbl67@xxxxxxxxx> wrote in message news:49e511b1$1@xxxxxxxxxxxxxxxxxx
dlzc wrote:
No, I'd put that squarely on structures internal to the
Earth, upwellings in the core flows and such.
I'm sure parts of the continents were produced by
pure volcanic activity, like you say.

I didn't say that, but those flows will have consumed the entire crust of the planet over billions of years. If you want to look for ther remains of "Mu", you'd need to look at subduction zones, like north of New Zealand.

Then what sort of "upwellings" were you referring to, if not volcanic?

I didn't get the reference to "remains of 'Mu'".

But I think the extreme level of continentalization on
Earth must've been started by the lopping off of the Moon.

Who says the opposite is not closer to the truth?

You just have to look at the planet most nearest
our size, Venus, to see that it's got nothing near
the continents we got. It's got two major
continents, Ishtar Terra & Aphrodite Terra. Ishtar
is only the size of the continental US, while
Aphrodite is only half the size of Africa. I think
Venus' continents were probably produced
through just standard volcanic processes alone.

Hard to see a strong parallel.

It's a similar sized planet, nearly 90% the size of Earth. It presumably formed out of the same primordial materials as the Earth, at the same time. Yet, they turned out so different from each other. I think Venus is by far the more relevant comparison to Earth, than Mars.

We've already discussed the lack of magnetic field on Venus. On Mars, the lack of magnetic field is understandable, its small size is almost a universal excuse for all of its numerous faults. Mars is too small to have held on to its atmosphere, it's too small to hang on to its water, too small to have a long-term molten core, therefore too small for a long-term magnetic field, etc., etc.

But by comparison Venus should be big enough to have kept all of that, yet it didn't. Venus should have been able to held on to its water, but it didn't. It should have a magnetic field, but it doesn't. Now, we find it's got barely any continentalization on its surface. If Venus were a water world like Earth, then more than 90% of it would be under water, since it's got such tiny continents. But of course we know it couldn't hang on to its water either. It's a mystery why such nearly identical twin planets turned out so fraternal.

However, I think Earth's continents were started by
the scar left over from the Moon scission. Where
the Moon plopped off the Earth, it left a scar which
became the basis of Earth's continents.

... or the floor of the Pacific ocean.

Because the floor of the Pacific didn't exist back then. There was some other global ocean back then. In another few million years the Atlantic will be the largest ocean, not the Pacific, and it'll look like the Moon must've come from the Atlantic, because it's got the biggest space.

If you look at the known history of the Earth's plates, you see that by and large, the continents have remained the same throughout its history compared to the seas. Yes, the continents rearrange themselves, crash into each other, raise mountains, form supercontinents, and break apart again, etc. But it seems to be nearly the same plates have continued to exist since their initial formation. By comparison, the oceanic plates are the ones that get ridden over by these continental plates. When two plates crash into each other, it is the oceanic plate that ends up being subducted under the continental plate, not vice-versa. So the ocean floors keep getting renewed, but the continents have mainly been there since the beginning. The continents do grow and renew themselves a bit by volcanic lava flows, but most of the crust that is heavily renewed is underwater. But if the continents had to form mainly by volcanic flows, then they would likely not cover more than 10% of the Earth's surface, like they do on Venus. I think a big crust-flexing event must've started the large continent formation initially. Some parts of the crust got thicker than other parts of the crust.


The scar on Earth is probably bigger than the area
from which the Moon arose. And over the years, the
scars (the continents) redistributed themselves all
over the Earth through tectonics.

You keep saying this, but there is no evidence of rock this old, or concentrations of materials "idenitical" to that from which the Moon is made.

Well, we did say that the Moon is mainly the lighter materials, such as silicates. The heavier materials like iron, sank to the bottom of the core.

What would happen to Earth's (and the Moon's
surface) if a "dust cloud" at about 1000K blew by
outside the heliosphere over a period of a few
centuries? This would allow the Sun to be an Easy
Bake Oven (R), and gloss over all sorts of formation
details...
Sure, but why would you need a special dust cloud
to blow by it?

Insulation between the Earth and the Sun lowers our temperature. And there was a post recently that the Earth is passing through such a dust cloud, if not as thick as it would need to be.

Oh, I see what you mean. But that dust cloud would have to be immense to provide such level of insulation that it blanketed the planets out to the heliosphere.


Yousuf Khan
.

Relevant Pages

  • Re: Searching for Theia, the mother of the Moon
    ... I'm sure parts of the continents were produced by ... The things that "upwell" under the plates to drive them along, ... Earth must've been started by the lopping off of the Moon. ...
    (sci.astro)
  • Re: Creationist Claim: No evidence that plates are still moving
    ... >> go back in time) and be assembled on the opposite of the earth. ... >> become the interiors of future continents and super-continents. ... >> Likewise when you then expand it, how do you get India ramming Asia? ... > of people like you when confronted with said anomalies. ...
    (talk.origins)
  • Re: Searching for Theia, the mother of the Moon
    ... Oh, I see, they assumed that the spin of the Earth would be affected ... if all of the continents piled up on one side of the globe. ... possibly a lot of water locked up in ice. ... America through the shallow seas of the Bering Straits. ...
    (sci.astro)
  • Re: Owens Two-Phase Model of Earth Expansion
    ... You're claiming earth expansion, ... > If you're saying that cratons were the initial continents, ... >> Unless, of course, the original ocean basins were formed from impact basins. ... >> evidence to support either slow or fast hypothesis. ...
    (sci.geo.geology)
  • Early Earth Wasnt So Hellish
    ... Earth was a hellish planet barren of continents. ... from outback Australia and found evidence that a fringe theory detailing the ...
    (sci.geo.geology)