Description
Rare Agassiceras personatum Ammonite Fossil from Redcar, Yorkshire
This exceptional specimen is a genuine Agassiceras personatum ammonite fossil, discovered at Red Howles, Marske, Redcar, Yorkshire, United Kingdom. Belonging to the Sinemurian Stage of the Early Jurassic, this fossil represents a species that lived approximately 196–190 million years ago in the shallow marine seas that once covered what is now northern England. Ammonites such as this are invaluable both as scientific index fossils and as stunning natural display pieces. Every fossil we offer is 100% authentic and comes with a Certificate of Authenticity for your complete confidence.
Geological Context
- Geological Period: Jurassic
- Stage: Lower Jurassic, Sinemurian
- Age: Approx. 196–190 million years old
- Location: Red Howles, Marske, Redcar, Yorkshire, UK
The rocks of the Redcar area form part of the Lower Lias succession, a world-renowned series of marine deposits famous for yielding beautifully preserved ammonites, belemnites, and marine reptiles. The Sinemurian Stage represents a time of dynamic evolutionary radiation, and ammonites from this interval are highly sought after by collectors due to their diversity and striking preservation.
Scientific Classification
- Kingdom: Animalia
- Phylum: Mollusca
- Class: Cephalopoda
- Order: Ammonitida
- Superfamily: Eoderoceratoidea
- Family: Polymorphitidae
- Genus: Agassiceras
- Species: Agassiceras personatum
Agassiceras was first described in the 19th century, with its distinct morphology making it a key genus for identifying Sinemurian-aged deposits. Its evolutionary traits reflect an important stage in the diversification of early ammonites.
Morphological Features
This Agassiceras personatum ammonite fossil displays the classic features of its genus:
- Compressed, evolute shell with a moderately open coiling.
- Fine, regular ribbing extending across the flanks and curving toward the venter.
- Prominent keel, a typical characteristic that provided hydrodynamic stability in the water.
- Well-defined suture patterns, visible in quality specimens, reflecting the internal complexity of chamber divisions.
These physical traits not only make Agassiceras a distinctive and easily recognisable fossil but also highlight its adaptation to its ancient marine environment.
Scientific and Historical Importance
The presence of Agassiceras personatum in the fossil record has long been used as a biostratigraphic marker fossil, helping geologists correlate Sinemurian deposits across Europe. The Redcar and Yorkshire Coast exposures have been studied since the early 19th century, attracting fossil hunters and professional geologists alike. This specimen is a direct link to the pioneering discoveries of that era, when the Lower Lias first revealed its wealth of Jurassic life.
Key Details
- Species: Agassiceras personatum
- Stage: Sinemurian, Lower Jurassic
- Location: Red Howles, Marske, Redcar, Yorkshire, United Kingdom
- Age: Approx. 196–190 million years
- Certificate of Authenticity: Included with every purchase
Collectability and Display
As a rare ammonite fossil from Yorkshire, this Agassiceras personatum represents an exceptional acquisition for any collector. Its historical provenance, scientific significance, and natural beauty make it highly desirable. Whether displayed as part of a fossil collection, used in educational settings, or treasured as a natural history piece, it captures both the artistry of nature and the science of deep time.
This ammonite fossil is supplied as shown, photographed to represent the exact specimen you will receive. A genuine and certified piece of Earth’s history, it is a unique opportunity to own a fossil from the Jurassic heritage of the UK’s Redcar coast.
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