Description
RARE Fossil Ammonite – Breydia crassornata
An impressive and rare 8-inch fossil ammonite from the Inferior Oolite Formation, this Breydia crassornata specimen was found at Burton Bradstock, part of the iconic Jurassic Coast World Heritage Site in Dorset, UK. It is an exceptional collector’s item due to its size, preservation and rarity within the stratigraphic record.
Fossil & Geological Information:
- Species: Breydia crassornata
- Family: Breydiidae
- Superfamily: Stephanoceratoidea
- Order: Ammonitida
- Geological Stage: Bajocian (Middle Jurassic, ~170–168 million years ago)
- Formation: Inferior Oolite
- Locality: Burton Bradstock, Dorset, United Kingdom
- Biozone: May be associated with the Crassornata or Discites Biozone (Middle Bajocian – used in fine-scale biostratigraphy)
- Depositional Environment: Shallow, tropical marine carbonate shelf environment
- Morphological Features:
- Large discoidal shell, approx. 8 inches in diameter
- Strong ribbing with characteristic thickened (crassate) ornamentation
- Well-developed keel
- Open umbilicus
- Typical features of Breydia genus which is stratigraphically important in regional Bajocian ammonite faunas
- Notable: Rarely found in such large and complete condition, this specimen is an excellent biostratigraphic indicator and highly collectable ammonite from southern England
- Formally Identified by: Described historically through comparative Bajocian ammonite studies in Dorset and Somerset regions
Specimen Details:
- Discovery Location: Burton Bradstock, Dorset, UK
- Discovered by: Alister and Alison (UKGE Team)
- Date of Discovery: 17 January 2025
- Preparation: Fully cleaned, stabilised and curated by Alison
- Scale Reference: Photo includes 1cm cube for accurate size reference
- Photography: The image shows the actual fossil you will receive
- Authenticity: Comes with an official Certificate of Authenticity – 100% genuine fossil guaranteed
About the Inferior Oolite Formation:
The Inferior Oolite is a Jurassic limestone unit famed for its well-preserved marine fossils, especially ammonites. Dating to the Middle Jurassic (Bajocian), it represents sedimentary deposits from a warm, shallow sea rich in biodiversity.
Collector’s Note:
This 8″ Breydia crassornata is a rare and museum-worthy ammonite specimen, ideal for both scientific display and private fossil collections. Due to its stratigraphic significance and size, such examples are seldom available on the market.
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