This Specimen has been sold.
3.6" Sphenodiscus Ammonites with Gorgeous Sutures - SD
This is a beautiful, 3.6" wide Sphenodiscus beecheri from the Fox Hills Formation of South Dakota. It was found inside of a hard concretion and the rock had to be meticulously prepared away. This specimen has gorgeous sutures and the rock has been cut flat at the bottom creating a very aesthetic display.
Dewey County, South Dakota
Fox Hills Formation - Hoploscaphites nebrascensis zone
Ammonite 3.6" wide, entire piece 4.1" tall