Re: Mountains


"Jo Schaper" <joschapern4ospam@xxxxxxxxxxxxxxxxx> wrote in message
news:11huudadae6vo2a@xxxxxxxxxxxxxxxxxxxxx
> 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.

You can't expect someone like Johnny to actually do his homework before he
posts such nonsense. In fact, I believe that the only reason he posts here
at all is because he is a gluton for punishment.

http://www.state.nd.us/ndgs/ndnotes/ndn16_h.htm

Wind blown ripples southwest of Walcott, North Dakota (Photo by J.
Bluemle).
Sand dunes are certainly our most obvious and spectacular wind-blown
landforms, but they are not the only kind of deposit in North Dakota that
was formed by the wind. While the wind was shaping the sand into dunes,
much finer, silt-sized particles were being blown greater distances and
spreading out over much wider areas. In fact, much of North Dakota is
veneered by a discontinuous layer of wind-blown silt that geologists call
"loess" (rhymes with "***;" the word translates approximately "loose" from
German). In places along the Missouri River valley in northern Mercer
County; just south of Garrison Dam in McLean County; and in parts of Emmons
County along the Oahe Reservoir the loess is as much as 20 feet thick. Over
much of southwestern North Dakota, the loess cover is from 3 to 6 feet
thick.


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