1.75" Mississippian Anthracoceras Fossil – Bear Gulch Formation Display Specimen

This authentic Anthracoceras beargulchensis fossil originates from the famed Bear Gulch Member of the Heath Formation in Fergus County, Montana. Dating back approximately 330–320 million years to the Mississippian Period, this fossil preserves the remains of an ancient marine cephalopod that once inhabited prehistoric inland seas.

The specimen features a distinct shell impression naturally preserved within the stone matrix, highlighting the recognizable curved structure of this extinct nautiloid relative. Fossils from the Bear Gulch locality are celebrated for their scientific significance and exceptional preservation, making them highly collectible among fossil enthusiasts.

Professionally mounted in a display frame with identification label, this piece is ideal for collectors, educators, and anyone interested in ancient marine life and Earth’s distant past.

Key Features:

Authentic Anthracoceras beargulchensis fossil

Mississippian Period marine cephalopod

Approximately 330–320 million years old

From the Bear Gulch Member, Heath Formation

Fergus County, Montana discovery location

Professionally framed and labeled

Natural shell impression preserved in matrix

Exact specimen pictured