010033 - Nicely Preserved Knightia Fossil Fish Eocene Green River Fm, Wyoming (USA) Knightia 87 Inch = 22

87 Inch = 22

indicating in orange the position of the  phalanx bones

Precious tooth of Cretolamna maroccana (Mackerel Shark) from the phosphate deposits of the Ouled Abdoun Basin (Morocco)

which makes it very special

marine snakes

010033 - Nicely Preserved Knightia Fossil Fish Eocene Green River Fm, Wyoming (USA) Knightia 87 Inch = 22Magnificent specimen with detailed preservation. You can see the whole bone structure as well as details of the jaw and its small teeth. From this type of fossilization, through taphonomy, many aspects of the original paleoenvironment can be learned. This type of preservation only occurs under certain very special circumstances, in the bottoms of lakes, with anoxic conditions, for example.