3.2" Hoploscaphites Brevis Ammonite - South Dakota
This is a beautiful, 3.2" wide Hoploscaphites brevis from the Pierre Shale of South Dakota. It was found inside of a hard concretion and the rock had to be meticulously prepared away. There is a second ammonite, plus a pair of baculites also present. The base of the rock has been cut flat so that the piece displays nicely on a flat surface.