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7.5" Ammonite (Arnioceras) Cluster - Holderness Coast, England
This is a 7.5" wide cluster of Lower Jurassic ammonites (Arnioceras semicostatum). It was collected from the Holderness Coast in East Yorkshire, England. There are about six visible ammonites ranging from .6 to 2.3" across which have been nicely prepared from the hard limestone.
Comes with a display stand.
Comes with a 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.
What an ammonite would have looked like while alive.
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.
What an ammonite would have looked like while alive.
SPECIES
Arnioceras semicostatum
LOCATION
Holderness Coast, East Yorkshire, England
FORMATION
Semicotatum Zone
SIZE
Cluster 7.5 x 4.2 x 2.2", Largest ammonite 2.3"
CATEGORY
SUB CATEGORY
ITEM
#207742
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