1.25" Mississippian Anthracoceras Fossil – Bear Gulch Member | 330–320 Million Years Old

This unique fossil specimen preserves an ancient Anthracoceras cephalopod dating back approximately 330–320 million years to the Mississippian Period. Fossils from this era provide a fascinating glimpse into prehistoric marine ecosystems that once covered much of North America.

Recovered from the famous Bear Gulch Member of the Heath Formation in Fergus County, Montana, this specimen showcases the preserved spiral structure of this extinct marine animal. The subtle fossil detail contrasts naturally against the stone matrix, creating a minimalist yet scientifically significant display.

Bear Gulch fossils are highly regarded among collectors due to the formation’s exceptional preservation and importance in understanding ancient ocean life. Professionally displayed and labeled, this piece makes an excellent addition to any fossil collection, office, classroom, or cabinet of curiosities.

Key Features:

Authentic Mississippian fossil specimen

Species: Anthracoceras beargulchensis

Approximately 330–320 million years old

Recovered from the Bear Gulch Member

Heath Formation, Fergus County, Montana

Professionally displayed and labeled

Excellent educational and collector piece

Exact specimen shown