Macrophotograph of a sliced and polished ammonite fossil. This species of ammonite (Phylloceratida?) existed during the late Jurassic (approx. 160 million yrs ago). From Madagascar
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
Patterns in a cut and polished slab of fossilized wood from Washington State Image #4585
