Hyracodon Jaw Section, Fossil, South Dakota Badlands, Oligocene, R1023

 
  
  

   Type: This is a fossil jaw section from
   
    Hyracodon nebraskensis
   
   .
  
  

   

   Locality: Private land in Pennington County, South Dakota
  
  

   

   Age: Oligocene, 30 Million Years Ago