Description
This is a rare 5.5″ fossil ammonite specimen of the genus Parkinsonia, originating from the renowned Inferior Oolite Formation on the Jurassic Coast, specifically Burton Bradstock, Dorset, United Kingdom. This ammonite dates back to the Middle Jurassic, approximately 170 million years ago, during the Bajocian Stage.
📏 Scale Rule Squares/Cube = 1cm — Full sizing is available in the photo gallery. The ammonite pictured is the exact specimen you will receive.
🧾 All of our Fossils are 100% Genuine Specimens & come with a Certificate of Authenticity.
Fossil & Geological Information:
- Fossil Type: Ammonite
- Genus: Parkinsonia
- Order: Ammonitida
- Superfamily: Stephanoceratoidea
- Family: Parkinsoniidae
- Geological Age: Middle Jurassic
- Stage: Bajocian (likely Upper Bajocian)
- Formation: Inferior Oolite
- Depositional Environment: Warm, shallow marine shelf — carbonate platform environment with high biodiversity
- Location: Burton Bradstock, Dorset, United Kingdom (Jurassic Coast World Heritage Site)
Morphology & Features:
Parkinsonia ammonites are well known for their:
- Evolute shell structure — all whorls clearly visible
- Wide umbilicus and deeply bifurcating ribs, giving a bold appearance
- Highly ornamented with regular, sinuous ribbing across the flanks
- Often includes tubercles or ventrolateral ridges in some species (varies)
- This particular specimen exhibits strong ribbing, symmetry, and preservation typical of Inferior Oolite faunas
These ammonites were nektonic carnivores, actively swimming and preying on smaller marine organisms.
Scientific & Collector Significance:
- Parkinsonia is a key index genus for the Bajocian Stage, making it important in ammonite biostratigraphy
- Specimens from Burton Bradstock are highly sought-after due to their completeness and beauty
- Excellent educational, research, and display fossil — representative of the rich marine life during the Middle Jurassic
- Often used in geological teaching for identification of oolitic marine sequences
You Will Receive:
- 5.5″ Parkinsonia fossil ammonite
- Certificate of Authenticity
- The actual photographed specimen — no substitutes
- Tracked and securely packed shipping
A beautiful and scientifically valuable fossil from the world-famous Jurassic Coast, this Parkinsonia specimen is a true collector’s item and a timeless relic of Earth’s ancient marine ecosystems.
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