Description
Offered here is a rare and authentic fossil ammonite of the genus Parkinsonia, originating from the Inferior Oolite Formation, Middle Bajocian Stage of the Jurassic Period. This beautiful specimen was collected from the renowned fossil beds of Burton Bradstock, Dorset, United Kingdom—a classic and highly fossiliferous site along the Jurassic Coast.
This fossil is part of the Alice Purnell Collection, a curated selection known for scientific integrity and exceptional preservation. You will receive the exact specimen shown in the photographs, and your fossil will come with a Certificate of Authenticity to guarantee its genuineness.
Scale rule square = 1cm. Please refer to the photograph for full sizing.
Geological & Palaeontological Context:
- Genus: Parkinsonia
- Geological Stage: Middle Bajocian (~170.3–168.3 million years ago)
- Formation: Inferior Oolite
- Location: Burton Bradstock, Dorset, UK
- Depositional Environment: Shallow marine carbonate platform. The Inferior Oolite was laid down in warm, tropical seas rich in life, dominated by oolitic limestones and bioclastic beds, ideal for ammonite preservation.
- Stratigraphy/Biozone (if identifiable): Parkinsonia species are associated with Parkinsoni Zone and Subzones, which serve as key biostratigraphic markers in the Middle Jurassic of Britain and Europe.
Taxonomic Classification:
- Family: Parkinsoniidae
- Superfamily: Stephanoceratoidea
- Order: Ammonitida
- Suborder: Ammonitina
- Named After: James Parkinson (1755–1824), noted English palaeontologist and the namesake of the genus
Morphological Features & Notable Traits:
Parkinsonia ammonites are characterised by:
- A strongly ribbed, evolute shell structure
- Wide umbilicus with prominent, bifurcating ribs crossing the flanks
- Keel present along the venter
- Typically symmetrical ornamentation with bold definition
- These features made them well adapted to life in energetic marine settings, possibly as free-swimming nektonic predators or scavengers.
Highlights:
- Beautifully preserved Parkinsonia fossil from a classic UK locality
- Represents a well-known marker genus for the Middle Bajocian
- Comes from the prestigious Alice Purnell Collection
- Ideal for collectors, educators, and museum-quality displays
- Supplied with Certificate of Authenticity
- Scale rule = 1cm square shown in photo
Final Notes:
All of our Fossils are 100% Genuine Specimens & come with a Certificate of Authenticity.
The fossil shown is the exact specimen you will receive.
From the famous fossil-rich Inferior Oolite of Dorset, this is a carefully selected and prepared piece of natural history.






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