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This Specimen has been sold.
HERE ARE SOME OTHER SIMILAR FOSSILS FOR SALE
5.65" Polished Ammonite (Promicroceras) - "Marston Magna Marble"
This is a stand-up of rock containing many small ammonite fossils, often referred to as "Marston Magna Marble". The ammonites are of the species Promicroceras marstonense and are Lower Jurassic (~200 million years old) in age. This rock is quarried near Marston Magna, Somerset, England and by slicing and polishing it, the beautiful inner chamber detail of the ammonites can be seen.
One side has been cut flat and polished to a glossy finish, while the opposite side has been left in a "rough" state, featuring the ammonites that have been painstakingly exposed one by one from the hard limestone. One edge of the rock has been cut flat for vertical presentation. There is some scratching to the polished surface.
The site that produces this material is no longer accessible. Because of this, these specimens are becoming increasingly harder to obtain.
One side has been cut flat and polished to a glossy finish, while the opposite side has been left in a "rough" state, featuring the ammonites that have been painstakingly exposed one by one from the hard limestone. One edge of the rock has been cut flat for vertical presentation. There is some scratching to the polished surface.
The site that produces this material is no longer accessible. Because of this, these specimens are becoming increasingly harder to obtain.
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
Promicroceras marstonense
LOCATION
Marston Magna, Somerset, England
FORMATION
Lower Lias, Obtusum Zone
SIZE
5.65 x 5.25", up to 1.9" thick
CATEGORY
SUB CATEGORY
ITEM
#279568
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