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Nearly all the dark or orange rocks here are pebbles of ancient BIF = banded iron formation!
0625M2_HilltopPavedWithBIF.jpg (497 Kb) (under photos/20/0624-28_WyomingCamping/)
By Alan Silverstein, ajs@frii.com (page updated Tue Mar 10 18:16:39 MDT 2026)