In article . com,
Darrell Lakin wrote:
Some models suggest that the surface of Venus was completely re-formed
within the last several hundred million years from an unknown source.

It's clear that Venus has been globally resurfaced in the last few hundred
million years: there simply are not enough impact craters on it (even
allowing for the screening effect of the thick atmosphere), and they are
too randomly distributed and too consistently fresh (there are no *old*
craters, or regions of old craters). But there is no great mystery about
the cause; there are several theories that account for it well, all based
on episodes of mass volcanic activity produced by internal heat.

There should be a large plain at the collision point and a large ridge
with volcanic evidence at the antipedal point on the other side of the
collision.

Let me guess: you've never actually looked at a map of Venus, right?
--
spsystems.net is temporarily off the air; | Henry Spencer
mail to henry at zoo.utoronto.ca instead. |