Macrophotograph of the structural detail in a piece of fossilized wood (Araucarioxylon arizonicum) from the Chinle Formation in Utah; late Triassic (approx. 225 million years) in age; an extinct confier Image # 4146 6144 X 4912 pixels (19.26 MB)
Macro photograph of a split fossilized ammonite shell showing the internal mineralized chambers; an extinct marine invertebrate from Madagascar; age: Cretaceous-Albian stage (110 million years ago) Image #3260 6091 X 4080 pixels
Earths' oldest fossils; formed by the activity of microbial mats (particularly cyanobacteria} in limestone-rich shallow waters Image #3765 4699 X 5797 pixels
