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To: E. Charters who wrote (64903)4/23/2009 9:35:08 AM
From: maxncompany  Respond to of 78407
 
Well, no one is chiming in, and I have no geological knowledge whatsoever, but I will do my duty and throw out this........

the Great Lakes.



To: E. Charters who wrote (64903)4/23/2009 9:44:12 AM
From: Tommaso  Read Replies (1) | Respond to of 78407
 
>>>The pebbles are quartzite.<<<

Probably not; you can see quartz veins cutting across some of them. Quartzite is highly metamorphosed sandstone, not some other stone cut by quartz intrusions. Usually it is very light colored.