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7.8" Fossil Ammonite (Dorsetensia & Otoites) Association - England
This is a gorgeous ammonite fossil association that was collected from Dorset, England. The largest ammonite (Dorsetensia subtecta) is 2.5" wide and the smaller ammonite (Otoites sauzei) is 1.55" wide. There are small bivalve fossils that have been exposed from the rock, along with what appears to be a piece of petrified wood. This specimen is Middle Jurassic in age, or approximately 160 million years old. The base of the rock has been cut flat so that it stands up without the need for 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
Dorsetensia subtecta & Otoites sauzei
LOCATION
Burton Bradstock, Dorset, England
FORMATION
Inferior Oolite, Sauzei Zone
SIZE
7.8 x 5.7"
CATEGORY
SUB CATEGORY
ITEM
#171272
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