Description
Genuine Graphoceras cornu Ammonite Fossil
This listing is for a genuine Graphoceras cornu ammonite fossil from the Middle Jurassic, Bajocian, Dogger Beta, collected from Geisingen, Baden-Württemberg, Germany. This is a carefully chosen fossil specimen, selected for its geological interest, natural character, and appeal as a collectable European Jurassic ammonite. The photograph shows the actual specimen you will receive, allowing you to view the fossil’s preservation, colour, matrix, shell form, surface detail, and overall appearance before purchase. For full sizing, please see the photo.
This fossil is supplied with a Certificate of Authenticity lifetime guarantee generic card, confirming that it is a genuine fossil specimen.
Fossil Type and Species
Graphoceras cornu is an ammonite, an extinct marine cephalopod related to modern squid, cuttlefish, octopus, and nautilus. Ammonites lived in coiled, chambered shells and were highly successful animals in the ancient seas of the Mesozoic Era. Their shells were divided internally into chambers, helping with buoyancy control, while the living animal occupied the final body chamber.
Graphoceras is a classic Jurassic ammonite genus and is valued by collectors for its elegant coiled form and scientific interest. Ammonites are especially important in geology because many species evolved rapidly and were widely distributed across ancient seas. This makes them useful for comparing and dating Jurassic rock layers, and a labelled Graphoceras cornu fossil is a desirable addition to collections focused on ammonites, stratigraphy, and prehistoric marine life.
Middle Jurassic Bajocian Geology
This fossil dates from the Middle Jurassic Period, specifically the Bajocian Stage, making it approximately 170 million years old. The Bajocian was a time when large areas of Europe were covered by warm, shallow marine seas. These ancient waters supported a rich ecosystem of ammonites, belemnites, bivalves, brachiopods, gastropods, crinoids, fish, and marine reptiles.
The term Dogger Beta refers to part of the traditional German Jurassic stratigraphic sequence. “Dogger” is commonly used for Middle Jurassic deposits in parts of Europe, and fossil ammonites from these beds are important for understanding the age and environment of the rocks. During this time, sediment accumulated on ancient sea floors, burying shells and other remains. Over millions of years, pressure, mineral-rich groundwater, and natural chemical processes transformed these remains into fossils.
Geisingen, Baden-Württemberg Locality
This specimen comes from Geisingen in Baden-Württemberg, Germany, a region with important Jurassic geology and a long history of fossil collecting. Southern Germany is especially well known for its Mesozoic fossil deposits, including ammonites and other marine fossils that record the ancient seas covering this part of Europe.
A Graphoceras cornu ammonite from Geisingen is a genuine piece of German Jurassic natural history. It is ideal for collectors interested in European fossils, Middle Jurassic ammonites, Bajocian specimens, Dogger fossils, and scientifically labelled display pieces.
Shell Form and Natural Features
Graphoceras ammonites typically show a coiled planispiral shell form, with whorls growing around a central coil as the animal matured. Features such as whorl shape, ribbing, shell compression, keel development, and overall ornamentation are important in ammonite identification. These natural shell characteristics formed during the animal’s life and now provide a fascinating record of Jurassic marine evolution.
As a genuine fossil, this specimen may show natural features such as mineral staining, matrix attachment, ancient surface wear, slight compression, weathered areas, small chips, fine cracks, or partial preservation. These details are normal in authentic fossil material and form part of the specimen’s geological history. The photo shows the exact fossil being offered, so every visible feature can be inspected before purchase.
Collectable German Jurassic Display Specimen
This Graphoceras cornu ammonite fossil is ideal for fossil collectors, geology students, educational collections, natural history displays, school teaching resources, or anyone interested in genuine Jurassic marine fossils. Its combination of Middle Jurassic age, Bajocian geological setting, Dogger Beta stratigraphy, German locality, and classic ammonite form makes it a strong addition to any fossil cabinet or display collection.
The specimen comes exactly as shown in the photo and includes a Certificate of Authenticity lifetime guarantee generic card, making it a reliable choice for collectors seeking a genuine Graphoceras ammonite, German Jurassic fossil, Bajocian ammonite, Dogger Beta specimen, or authentic natural history display piece.
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