Description
A remarkable and rare 8″ Eboraciceras dissimili fossil ammonite, expertly preserved within the Oxford Clay Formation, dated to the Oxfordian Stage of the Upper Jurassic Period, found at Northmoor, Oxfordshire (Oxon), United Kingdom.
This large and uncommon ammonite species, Eboraciceras dissimili, is known for its coarsely ribbed shell and significance in regional biostratigraphy. It is part of the:
- Order: Ammonitida
- Superfamily: Stephanoceratoidea
- Family: Cardioceratidae
Morphological Features:
- Robust shell structure with strongly defined, spaced ribs
- Evolute coiling with all whorls visible
- Slightly compressed whorls and a broad venter
- Ornamentation includes distinct radial ribs and occasional tubercles, giving it a textured appearance
Geological Context:
- Formation: Oxford Clay
- Stage: Oxfordian (Upper Jurassic)
- Age: Approximately 163.5 to 157.3 million years ago
- Locality: Northmoor, near Oxford, UK
- Depositional Environment: Marine shelf setting within a low-energy, offshore environment; the Oxford Clay is renowned for preserving marine life including ammonites, marine reptiles, and bivalves.
- Biozone: May correspond to the Cardioceras cordatum or Eboraciceras dissimili zone in regional zonation schemes, though correlation varies
Notable Information:
- Fossils from the Oxford Clay are prized for their three-dimensional preservation in soft, organic-rich sediments
- Eboraciceras is a relatively rare genus and often sought after by collectors and researchers
- Formally described in the mid-20th century as part of studies of Upper Jurassic ammonite fauna of the UK
This listing includes actual photographs of the fossil you will receive, including a 1cm square scale cube for accurate measurement. It is a carefully selected specimen, showcasing the best in British Jurassic fossil preservation.
Authenticity Guaranteed: As with all our specimens, this fossil is 100% genuine and comes with a Certificate of Authenticity. It makes an outstanding addition to any palaeontological collection, suitable for display, research, or educational use.
Please view all images for full details and sizing. A rare opportunity to own a spectacular ammonite from the iconic Oxford Clay of Oxfordshire.
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