.95" Fossil Goniatite (Anthracoceras) - Bear Gulch Limestone, Montana

This is a fossil goniatite of the species Anthracoceras sp. that was collected from the Bear Gulch limestone of Fergus County, Montana. The goniatite is .95" wide on a 1.8 x 1.55" slab of limestone.

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.
FOR SALE
$49
DETAILS
SPECIES
Anthracoceras sp.
LOCATION
Fergus County, Montana
FORMATION
Bear Gulch Limestone - Heath Shale Formation
SIZE
.95” wide goniatite on a 1.8 x 1.55" rock
CATEGORY
ITEM
#130252
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