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I took Chris Brown camping and kayaking at the south end of Pathfinder Reservoir, Wyoming. In one very remote spot, we hiked up a hill looking for banded iron formation (BIF) beauties, and we found this excellent specimen.

It's a mixture of hematite, magnetite, and jasper that's 2-2.5 billion years old, compressed and folded by eons of mountain building. At home I sprayed it with acrylic gloss.

0620A_ChrisBIF_Front.jpg (306 Kb) (under photos/16/Random/)

By Alan Silverstein, ajs@frii.com (page updated Tue Mar 10 18:16:39 MDT 2026)