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Post by ncboman on Mar 22, 2006 23:21:52 GMT -5
I was pokin around and found this page. web pageThe info is based on Wissahickon formation which is no longer accepted theory but the info acceptable for my purposes. Also related to this subject is this interesting site; Maryland Archeology
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Post by Twanger on Mar 25, 2006 12:47:19 GMT -5
Thanks Bowman - I bookmarked those.
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