Description
A rare and striking fossil ammonite of the genus Coroniceras, this piece originates from the Lower Pliensbachian stage of the Early Jurassic, discovered in the fossil-rich beds of Radstock Grove Quarry, near Radstock, Somerset, United Kingdom. Known for its large and robust shell with bold ribbing, Coroniceras is a genus highly sought after by collectors and palaeontologists alike.
- Fossil Type: Ammonite (extinct marine cephalopod)
- Genus: Coroniceras
- Size: See scale cube in photo (1cm squares)
- Geological Period: Jurassic
- Stage: Lower Pliensbachian (~190–183 million years ago)
- Locality: Radstock Grove Quarry, Radstock, Somerset, England, UK
- Family: Arietitidae
- Superfamily: Psiloceratoidea
- Order: Ammonitida
- Depositional Environment: Shallow marine sea, part of the Lias Group formations, with soft sedimentation ideal for fossil preservation
Geological & Scientific Significance:
Coroniceras is among the most iconic early Jurassic ammonite genera and plays a key role in biostratigraphy and palaeontological studies. Characterised by its massive, thickly ribbed shell, this genus is associated with nektonic lifestyles in relatively shallow, oxygen-rich marine environments.
Although more commonly associated with upper Sinemurian deposits, larger and evolved forms of Coroniceras do occur into the Lower Pliensbachian, particularly in transitional beds within the Lias Group.
The Radstock area has long been studied for its exceptional Jurassic fossil content, making this specimen not only a visually impressive piece but also a part of British palaeontological history.
Notable Features:
- Bold, radiating ribbing and heavy, involute coiling
- Robust shell typical of Arietitidae family ammonites
- Rare stratigraphic occurrence from Lower Pliensbachian beds
- Excellent for collectors and educators alike
Authenticity Guaranteed: All of our fossils are 100% genuine. This ammonite is accompanied by a Certificate of Authenticity, confirming its scientific identity and provenance.
Photo Disclosure: The fossil shown in the photos is the exact specimen you will receive. Scale cube (1cm squares) provides accurate size reference.
This Coroniceras fossil ammonite is a museum-quality addition to any collection, showcasing the strength and beauty of Early Jurassic marine life from the historical fossil beds of Somerset.






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