[meteorite-list] 'Chevrons' Are Not Evidence Of Megatsunamis

[lebofsky at lpl.arizona.edu]

Hi All:

Why can't these chevrons in the Mars picture just be typical sand dunes?

I happened to look at the whole picture and the lower features that look
like boomerangs are called barchans and are caused by wind. I happened to
actually use this picture at a workshop last week! The wind blows the dust
off of the high areas on the left and creates these features.

Larry

> Here's a great photo of a group of chevrons:
>
> http://www.flickr.com/photos/badastronomy/3432647881/sizes/o/
>
> Must have been one hell of a tsunami.
>
> http://blogs.discovermagazine.com/badastronomy/page/8/
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