Talk:Gunflint Chert

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[edit] Age?

Present article (12 May 07) says 2.51 Ga in first sentence, and 1.9-2.3 Ga in second. First web reference says 1.6-1.9 Ga for 'Gunflint range iron formations' (is this the same thing?); second web reference says 2 Ga. Is it that poorly dated? Can anyone improve this with a good reference? --Zamphuor 16:52, 12 May 2007 (UTC)