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7.4" Orthocone Nautilus Fossil - Montana
This is a 7.4" fossil orthocone nautilus of genus, Reticycloceras, from the Mississippian-aged Heath shale Formation in Montana. These nautiloids had long tapering cones much like other straight-shelled cephalopods that became less and less popular through the course of cephalopod evolution. An uncommon find and a great addttion to any collection.
It comes with an acrylic display stand.
It comes with an acrylic display stand.
About Nautilus Fossils
autilus is a classic shelled cephalopod with a fossil history spanning more than 500 million years. Fossil nautilus shells are instantly recognizable by their tightly coiled, chambered structure, created as the animal grew and adjusted buoyancy using a central siphuncle. These fossils often preserve beautiful suture patterns, internal chambers, and sometimes even traces of original nacre. Found in marine deposits worldwide and frequently mineralized with calcite or chalcedony, fossil Nautilus specimens provide a striking glimpse into ancient seas and showcase one of the most enduring designs in natural history.
A picture of a modern day Nautilus.
autilus is a classic shelled cephalopod with a fossil history spanning more than 500 million years. Fossil nautilus shells are instantly recognizable by their tightly coiled, chambered structure, created as the animal grew and adjusted buoyancy using a central siphuncle. These fossils often preserve beautiful suture patterns, internal chambers, and sometimes even traces of original nacre. Found in marine deposits worldwide and frequently mineralized with calcite or chalcedony, fossil Nautilus specimens provide a striking glimpse into ancient seas and showcase one of the most enduring designs in natural history.
A picture of a modern day Nautilus.
SPECIES
Reticycloceras sp.
AGE
LOCATION
Fergus County, Montana
FORMATION
Heath Shale Formation - Bear Gulch Limestone
SIZE
Nautilus: 7.4" long, Rock: 6.9 x 5.95"
CATEGORY
ITEM
#217937
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