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Brain Endocast Fossil Oreodont Mammal 30 Mil Yrs Old #14783 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.    On the endocast, you can actually see the markings of the brain sulci (lines in the brain)!    The endocast measures 3 inch in length by 2 inches in width by 1 1/2 inch in height.  

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