Macro photograph of the patterns in a piece of fossilized oak from Oregon; Miocene in age Image #3415 4800 X 3200 pixels
Unusual coloration in an Ammonite (Cleoniceras cleon) fossil; Middle Cretaceous (110 million years ago); from Madagascar Image #2423 3200 X 4800 pixels
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 #4217 6144 X 4912 pixels (10.12 MB)
