Earths' oldest fossils; formed by the activity of microbial mats (particularly cyanobacteria} in limestone-rich shallow waters Image #3765
Macro photograph of a sliced Goniatite fossil showing the interior chambered structure of the shell; Goniatites are an extinct ammonoid cephalopod, Devonian in age (approx. 400 million yrs old); this from the Atlas Mountains in Morocco Image #3118
Stitched macro 'panoramic' of an ammonite fossil. An extinct marine invertebrate found in Madagascar; existed during the Middle Cretaceous period approx. 110 million years ago. Image #3160
