2.4" Fossil Orthoconic Nautiloid - Bear Gulch Limestone, Montana

This is a fossil nautiloid that was collected from the Bear Gulch limestone of Fergus County, Montana. It is an orthoconic nautiloid, meaning it has a cone shape as opposed to the spiral shape seen in many nautiloids. It is

Comes with an acrylic display stand.

Goniatites possessed a shell which was divided internally into chambers filled with gas for buoyancy. An open chamber at the front of the shell provided living space for the animal. The general morphology and habit of goniatites was probably similar to that of their later relatives the ammonites, being free swimming and possessing a head with two well developed eyes and arms.
Unidentified Nautiloid
Fergus County, Montana
Bear Gulch Limestone - Heath Shale Formation
2.4” long nautiloid on a 3.4 x 1.6" rock
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