Re: HOW

On or about Fri, 06 Oct 2006 23:30:12 GMT did "Ashbury" <OH
GOD@xxxxxxxx> dribble thusly:

How did Vic Crater erode like this. The crater rim is totally unique..all
jagged. Very strange. And equally strange is the pattern of dunes that
reflect wind and sand deposition. You just don't see that pattern with dunes
on Earth.

The explanation that jumps out at me is this:

The impact heated and compressed the sandy soil, which allowed the
crater to not be wiped out very quickly by sandstorms. Fissures
developed between relatively more strongly bound chunks of soil, due
to erosion and the tug of gravity. They fall into the crater, get
smashed to more easily erodable bits, and leave the jagged outlines of
where they used to sit.

Perhaps there was even water involved (liquified by the impact), with
the jagged edges being closely related to what you see in deserts that
have periodic rainfalls (little canyons all over the place).

Whatever the actual explanation, I just don't get a "that's weird"
effect from that picture.
--
- Mike

Ignore the Python in me to send e-mail.
.

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