Re: Mesozoic snow?

[Aidan Karley <aidan_karley@yahoo.co.uk>]

In article <BED11CEA.8732%missraptor@deadraccoon.com>, Swift Claw wrote:
> > The best place to look for polygonal paleosols in Mesozoic rocks would be
> > in Australia, northern Canada, northern Siberia, and Alaska (duh).
> 
> But the time I see something like that happen is mainly in the summer when
> the rains hit the dry soil and then dry again quickly...
>
       "Patterned ground" due to freeze-thaw action is decidedly different in 
small and large scale structure to desiccation cracks. Most sedimentology 
texts should detail the differences (I think I was introduced to them from a 
1940s geomorphology text book.)
-- 
 Aidan Karley,
 Aberdeen, Scotland,
 Location: 57°10' N,  02°09'  W (sub-tropical Aberdeen), 0.021233
 Written at Sun, 12 Jun 2005 09:09 +0100



                
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