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4.8" Fossil Ammonite (Placenticeras) Spiral Section - Elk Creek
This is the center spiral of an ammonite of the genus Placenticeras, collected from the Late Cretaceous aged Pierre Shale of Elk Creek, South Dakota. It is the negative half of the split and still has pieces of the iridescent shell.
Comes with an acrylic display stand.
Comes with an acrylic display stand.
About Ammonites
Ammonites were ancient marine cephalopods, similar to today's squids and octopuses, but with a defining feature: their distinctive, tightly coiled spiral shells. These shells, resembling those of modern nautiluses, served as both a protective home and a buoyancy aid, allowing ammonites to navigate the prehistoric seas with ease. First emerging around 240 million years ago in the Triassic Period, ammonites thrived for over 175 million years, adapting through numerous forms and sizes. As predatory creatures, they likely fed on smaller marine organisms, using their tentacles to capture prey. However, their long reign came to an end 65 million years ago at the close of the Cretaceous, coinciding with the mass extinction event that also eliminated the dinosaurs.
Ammonites were ancient marine cephalopods, similar to today's squids and octopuses, but with a defining feature: their distinctive, tightly coiled spiral shells. These shells, resembling those of modern nautiluses, served as both a protective home and a buoyancy aid, allowing ammonites to navigate the prehistoric seas with ease. First emerging around 240 million years ago in the Triassic Period, ammonites thrived for over 175 million years, adapting through numerous forms and sizes. As predatory creatures, they likely fed on smaller marine organisms, using their tentacles to capture prey. However, their long reign came to an end 65 million years ago at the close of the Cretaceous, coinciding with the mass extinction event that also eliminated the dinosaurs.
SPECIES
Placenticeras sp.
LOCATION
Elk Creek, Meade County, South Dakota
FORMATION
Pierre Shale Formation
SIZE
Entire Piece: 4.8 x 3.6 x 3"
CATEGORY
SUB CATEGORY
ITEM
#326510
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