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Brain Endocast Fossil Oreodont Mammal 30 Mil Yrs Old #15596 9o

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This is a really unique fossil called a brain endocast.  A brain endocast is basically a visible mold of an animal's brain.  It is formed when an animal dies, the brain decomposes, and then sediment fills the empty brain cavity and fossilizes.   When the bone around the brain cavity is removed, you can see the brain endocast inside.   This brain endocast is from a mammal called an Oreodont, which lived during the Oligocene time period, approximately 30 million years ago. The endocast measures 2 3/4 inches in length by 1 3/4 inches in width by 1 1/4 inches in height.  

This is an interesting and educational fossil! We have a variety of other fossils! Please check us out!