Found in NW Iowa

[Pkolson]

Omar's deposited by glaciers

http://www.erudit.org/revue/gpq/2000/v54/n3/005654ar.pdf

 

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[Pkolson]

http://www.iceageartifacts.com/images/Fire Rock - KH (240 x 300).jpg

So omar's were used for things like this?