Creation of Moon, Tides, Pangae
Date: April 2009
The mars sized planet as we know as the moon
impacted the earth lots of years ago. Did the creation of the moon
separate the super continent Pangea? Did the world have tides before the moon?
The proposed theory is more like this:
The proto-Earth and proto-Moon collided and essentially destroyed each other.
That is, massive parts of both the proto-Earth and proto-Moon were destroyed so
that when they each reformed to the current Earth and Moon, much mixing of parts
actually occurred. Evidence of this for example is that the Moon is considered to
have an iron core (much like Earth), whereas no other moon is known to be like this.
This means that very little of the features of the proto-Earth and proto-Moon
features survived to the present day.
We also know that the Moon is receding from the Earth at a decelerating rate. This
is considered to be evidence that the Moon was once much closer to the Earth. Thus,
massive tides and major upheavals must have occurred at this time - which further
emphasizes that any features of the proto-Earth and proto-Moon must have been erased
during the collision.
Greg (Roberto Gregorius)
Last question, first. The Earth did have tides because or its revolution around
the sun. Although smaller than the lunar tides, one still has to correct for them
when measuring gravity.
As for the existence of Pangea and the collision that seems to have formed the moon.
The collision apparently occurred well before the continent we know of as Pangea
formed. I would think that a collision of that magnitude would have pretty much
wiped out any continent existing at the time.
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Update: June 2012