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 #4071 6144 X 4080 pixels
An extinct marine invertebrate found in Madagascar; existed during the Middle Cretaceous period approx. 110 million years ago. Image #1898 4800 X 3200 pixels
Macro photograph of the patterns in a piece of petrified wood from Saddle Mountain, Washington State Image #3454 4080 X 6144 pixels
