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3.55" Iridescent Ammonite (Caloceras) - England
This is a 3.55" wide, brilliantly iridescent ammonite (Caloceras johnstoni) fossil from England. It has a naturally iridescent shell showing nice green, orange and red colors. Like most fossils from the Blue Lias Formation, these ammonites have been compressed and flattened by the same geological processes of heating and pressure which gives them their iridescent shell. The rock around the ammonite was polished so as to not detract from the beauty of the shell.
This is a particularly nice specimen with a lot of flash. It is accompanied by an acrylic display stand.
This is a particularly nice specimen with a lot of flash. It is accompanied by 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.
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
Caloceras johnstoni
LOCATION
Watchet, Noth Somerset, England
FORMATION
Blue Lias Formation
SIZE
3.55" wide on 8.8 x 5.5" shale
CATEGORY
SUB CATEGORY
ITEM
#206439
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