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Two of my favorite rocks found a few years ago at section 11 northeast of Fort Collins: Petrified wood on the left, and a corrugated chalcedony on the right. I took these pictures to share with the FC Rockhounds Club Facebook group.
1226A_Section11_Rocks.jpg (787 Kb) (under photos/20/Random/)
By Alan Silverstein, ajs@frii.com (page updated Sun Mar 9 14:33:54 MDT 2025)