Re: Mountains

From: Jo Schaper <joschapern4ospam@xxxxxxxxxxxxxxxxx>
Date: Wed, 07 Sep 2005 18:36:39 -0500

jonathan wrote:

If you'll notice, the dunes are finely laminated, as are almost
all the Meridiani dunes. This means the wind didn't simply
blow the dust in and leave it as we see it. It means the
sand dunes were buried. Then excavated by water at the bottom
of a lake/sea.  And later modified by wind
http://www.windows.ucar.edu/tour/link=/earth/geology/sed_dunes.html

Which is why they are so complex.  These Meridiani dunes are not
your typical wind blown dunes. And since these dunes are still
clay-like, not rocks, it means they are not terribly old.

Suggest you do some googling on the term 'loess', and you may find earth analogs to finely laminated windblown silt deposits. .

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