2.65" Rare Hoploscaphites spedini - South Dakota

This is a rare, Hoploscaphites spedini from the Fox Hills Formation of South Dakota. It's 2.65" wide and was prepared completely free of the matrix. It comes with an acrylic display stand.

These 70 million year old ammonites lived when South Dakota was a shallow inland sea. It was found preserved in a concretion that was split open. It then had to be hand prepared to remove the hard rock surrounding it from the shell, a very time consuming task.