Description
GENUINE CALYCOCERAS NAVICULARE AMMONITE FOSSIL
This listing is for a genuine Calycoceras naviculare ammonite fossil from the Upper Cenomanian of Kent, UK. This is a carefully chosen fossil specimen, with the listing photo showing the actual fossil you will receive. It is an excellent piece for collectors of British fossils, Cretaceous ammonites, chalk fossils, marine fossils, natural history specimens, and classic UK palaeontology.
This fossil is supplied with a Certificate of Authenticity lifetime guarantee generic card, confirming that it is a genuine natural fossil specimen. Full sizing can be seen in the photo.
SPECIES AND FOSSIL TYPE
Calycoceras naviculare is an ammonite, an extinct marine cephalopod related to modern squid, cuttlefish, and nautilus. Ammonites lived in chambered shells and were among the most successful marine animals of the Mesozoic Era. Their shells were divided into internal chambers, with the animal occupying the final body chamber and using the earlier chambers to help control buoyancy in the water.
Calycoceras is a well-known Cretaceous ammonite genus and is especially associated with the Cenomanian Stage. Fossils of this type are valued by collectors because they combine attractive ammonite form with useful geological importance. Ammonites are often used in biostratigraphy because many species evolved quickly and were widely distributed in ancient seas, making them helpful for recognising and correlating rock layers of similar age.
GEOLOGICAL AGE AND CENOMANIAN SETTING
This specimen dates from the Upper Cenomanian, part of the Late Cretaceous Period. The Cenomanian was a time of high global sea levels, when large areas of southern Britain were covered by warm, shallow marine waters. These seas supported a rich marine ecosystem including ammonites, bivalves, echinoids, sponges, belemnites, fish, marine reptiles, and many planktonic organisms.
The Upper Cenomanian is an important interval in British Cretaceous geology. During this time, chalky marine sediments were accumulating across what is now south-east England. These sediments formed in a relatively open shelf sea, where carbonate-rich mud settled slowly on the seabed. Over millions of years, this soft carbonate mud compacted and hardened into chalk and associated chalk-rich deposits.
KENT, UK CHALK FOSSIL LOCALITY
Kent is one of the most famous regions in Britain for Cretaceous chalk fossils. The county is strongly associated with classic chalk exposures, coastal cliffs, quarries, and inland sections that have produced fossils for generations. Fossils from Kent are highly collectable because they come from a historic British geological setting and represent the ancient marine life of the Cretaceous seas that once covered southern England.
The chalk deposits of Kent are part of the wider Chalk Group, one of the most recognisable geological units in the UK. Chalk was formed largely from the microscopic calcium carbonate plates of coccolithophores, tiny planktonic algae that lived in the sunlit surface waters of the Cretaceous sea. As these organisms died, their remains settled on the seafloor and built up thick layers of pale carbonate sediment. Ammonites preserved within these deposits offer a direct link to that ancient marine environment.
MORPHOLOGY AND COLLECTABLE FEATURES
Calycoceras naviculare is appreciated for its classic ammonite structure and Cretaceous age. Ammonites of this group may show strong ribbing, rounded to compressed whorl form, and shell ornamentation that reflects their growth pattern. Ribbing and shell shape are important features used by palaeontologists to distinguish ammonite species and genera.
The name Calycoceras is associated with robust Cretaceous ammonites that can show bold ornamentation. These shell features would have helped strengthen the shell and may also have influenced hydrodynamics as the animal moved through the water. The coiled shell form, chambered internal structure, and distinctive ammonite ornamentation make this fossil both visually appealing and scientifically interesting.
CRETACEOUS MARINE ENVIRONMENT
When this ammonite was alive, Kent would not have looked like it does today. Instead of dry land, the region lay beneath a warm marine sea connected to a much wider Cretaceous ocean system. The seabed was covered in fine carbonate mud, while plankton, fish, ammonites, and other marine animals lived in the water above.
Calycoceras naviculare would have been part of this open marine ecosystem, moving through the water as an active cephalopod predator or scavenger. Its shell provided protection and buoyancy control, while its soft body would have extended from the final chamber. Fossils like this help illustrate the diversity of life in the Late Cretaceous seas and the long geological history preserved in the rocks of Kent.
AUTHENTICITY AND DISPLAY
This Calycoceras naviculare ammonite fossil is a genuine specimen and includes a Certificate of Authenticity lifetime guarantee generic card. The listing photo shows the actual fossil you will receive, so you can buy with confidence knowing the specimen pictured is the one supplied.
This fossil would make an excellent addition to a fossil cabinet, geology collection, educational display, natural history collection, or specialist ammonite collection. It is also a thoughtful gift for fossil collectors, palaeontology enthusiasts, students, teachers, or anyone interested in British fossils and prehistoric marine life.
PRODUCT DETAILS
Fossil: Ammonite
Species: Calycoceras naviculare
Age: Upper Cenomanian, Late Cretaceous
Location: Kent, UK
Specimen: Genuine fossil ammonite
Certificate: Includes Certificate of Authenticity lifetime guarantee generic card
Sizing: Please see photo for full sizing
Photo: Shows the actual specimen you will receive
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