1.3" Mississippian Fossil Ammonite - Bear Gulch Limestone

This is a fossil ammonite from the Mississippian-aged Heath Shale Formation of Fergus County, Montana. This specimen is well preserved and the color of the specimen contrasts nicely against the limestone.

It comes with an acrylic display stand.

Ammonites were predatory cephalopod mollusks that resembled squids with spiral shells. They are more closely related to living octopuses, though their shells resemble that of nautilus species. True ammonites appeared in the fossil record about 240 million years ago during the Triassic Period. The last lineages disappeared 65 million years ago at the end of the Cretaceous.

What an ammonite would have looked like while alive.
What an ammonite would have looked like while alive.

FOR SALE
$39 $35
DETAILS
SPECIES
Unidentified
LOCATION
Bear Gulch Limestone, Fergus County, Montana
FORMATION
Heath Shale Formation
SIZE
Ammonite: 1.3” wide, Rock: 3.7 x 3.5"
CATEGORY
ITEM
#262970
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