Macrophotograph of a palm root fossil cross-section Image #3730 5666 X 3818 pixels (6.50 MB)
Closeup of the structural detail in a piece of colorful petrified wood from Arizona; Araucarioxylon arizonicum from the Chinle Formation; Late Triassic in age ((roughly 225 million years); the state fossil of Arizona Image #4218 4080 X 6055 pixels (6.3 MB)
Macrophotograph of the structural detail in a piece of fossilized wood (Araucarioxylon arizonicum) from Arizona; late Triassic (approx. 225 million years) in age; the state fossil of Arizona; an extinct conifer Image #4080 6144 X 3876 pixels
