A leafy branch fossil of Araucaria pichileufensis

A leafy branch fossil of Araucaria pichileufensis

A leafy branch fossil of Araucaria pichileufensis

A leafy branch fossil of Araucaria pichileufensis, showing detail of the small, overlapping leaves that give the branch segment a characteristic rope-like appearance.

IMAGE: Gabriella Rossetto-Harris, Penn State University