Macro photograph looking down on a piece of fossilized coral with emphasis on its repetitive patterns and textures Image #3623
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
Earths' oldest fossils; formed by the activity of microbial mats (particularly cyanobacteria} in limestone-rich shallow waters Image #3765
