Object ID:
2019.1.10
Collection:
Natural History
Object Name:
Fossil
Dimensions:
H-2.3 W-4.1 L-4.5 cm
Kingdom:
Animalia (Animals)
Phylum:
Mollusca (Molluscs)
Description:
Singular specimen of horned ammonite.
The Hell Creek is the only formation of appropriate age for the specimen in Custer County. However, it is a fluvial and flood plain deposit. Not a marine deposit. While it is possible this ammonite found it's way inland, it is highly unlikely.
The Hell Creek is the only formation of appropriate age for the specimen in Custer County. However, it is a fluvial and flood plain deposit. Not a marine deposit. While it is possible this ammonite found it's way inland, it is highly unlikely.
Class:
Cephalopoda (Octopus, squid)
Genus:
Jeletzkytes
VE Exhibit Label 1:
Ammonites are an ancient cephalopod. They used the tentacles protruding from their shells to swim through ancient seas. While they likely resembled the modern Nautilus they are more closely related to squids and octopus. This particular specimen was collected in Montana and is at least 65 million years old.
Species:
nodosus
Fossilization:
Recrystallization
Period:
Cretaceous
Formation:
Hell Creek
Site Name:
Custer county, Montana
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Dscn5983
Dscn5983