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Subject:
From:
JOhn a cramer <[log in to unmask]>
Reply To:
Conchologists of America List <[log in to unmask]>
Date:
Thu, 26 Mar 1998 21:06:45 -0500
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text/plain
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I found John Downing's information intriguing but I didn't follow it all.  
If the shell loss is caused by shell closure but creates shell closure,
isn't it self-limiting?  And what does it mean that negative shell growth 
is swept under the rug?
Are basic freshwater lakes common around the US?

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