Description
A finely preserved specimen of Hammatoceras jurense, a coiled fossil ammonite from the Upper Toarcian Stage of the Early Jurassic, approximately 180 million years old. This ammonite was collected in France, a region well-known for its exceptional fossiliferous strata from this geological stage.
Hammatoceras is easily identified by its strongly ribbed, planispirally coiled shell and well-developed keel, with H. jurense representing one of the classic species used for biostratigraphic correlation in the Toarcian.
Fossil Type: Ammonite (extinct marine cephalopod)
Species: Hammatoceras jurense
Geological Age: Lower Jurassic – Upper Toarcian Stage
Formation: Likely part of the Toarcian clay-limestone sequences common in northern and central France
Depositional Environment: Formed in a calm, offshore marine basin under low-oxygen conditions. These sedimentary environments favoured preservation of cephalopods and other marine invertebrates in fine-grained limestone or marl.
Morphological Features:
- Strongly ribbed shell with prominent radial ribs
- Planispiral coiling with an open umbilicus
- Distinct keel running along the venter
- May show partial preservation of original shell material or infill
Notable:
- Key zone fossil for the Upper Toarcian of Europe
- Collected from a classic French Jurassic locality
- Ideal for collectors, educators, and display
- Actual specimen shown in the listing photograph
Authenticity: All of our fossils are 100% genuine natural specimens and are supplied with a Certificate of Authenticity. The image includes a 1cm scale rule or cube for accurate sizing.
This Hammatoceras jurense fossil offers a striking example of Early Jurassic ammonites, combining scientific significance with elegant natural form. A must-have for fossil enthusiasts and collectors alike.
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