Fossil Sweet Gum

A big slab of petrified wood that is green

Photo by Stephanie Reed

This is a cross-section of a fossilized sweet gum tree from the Hampton Butte in Crook County, Oregon. We saw it at the Rice Museum in Hillsboro, Oregon where it is in the petrified wood room. I hardly ever see petrified wood that is green like this; usually it’s red, orange, or brown. Anybody know what makes it green?

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