Description
Available here is a RARE Graphoceras concavum ammonite fossil, sourced from the Lower Bajocian Stage of the Middle Jurassic Period, specifically from the iconic Dorset Coast in the United Kingdom—a site renowned globally as part of the Jurassic Coast UNESCO World Heritage Site.
Graphoceras concavum is an extinct ammonite species from the family Hammatoceratidae, part of the superfamily Hildoceratoidea. This genus is distinguished by its tightly coiled, involute shell, fine ribbing, narrow umbilicus, and characteristic deeply concave flanks. The preservation of this fossil highlights these diagnostic features in superb detail.
This ammonite fossil is a beautiful and scientifically valuable specimen, ideal for educational purposes, private collections, or as a unique display piece. The 1cm scale cube shown in the photos provides a clear sizing reference. You will receive the exact fossil pictured.
All of our Fossils are 100% Genuine Specimens and are accompanied by a Certificate of Authenticity.
Geological & Scientific Details:
- Scientific Name: Graphoceras concavum
- Type: Fossil Ammonite (extinct marine cephalopod)
- Geological Period: Jurassic
- Stage: Lower Bajocian (approx. 170.3 – 168.3 million years ago)
- Formation/Location: Dorset Coast, United Kingdom
- Order: Ammonitida
- Superfamily: Hildoceratoidea
- Family: Hammatoceratidae
- Morphology: Strongly involute shell with sharp ribbing, concave flanks, and a keeled venter
- Depositional Environment: Shallow marine shelf with clay-rich marl sedimentation in an epicontinental sea
- Biozone: Graphoceras concavum biozone — key for biostratigraphy in the Bajocian
- Scientific Relevance: Serves as an important index fossil for stratigraphic correlation and evolutionary study of Middle Jurassic ammonoids
Why Choose This Fossil?
- Verified Authenticity — includes Certificate of Authenticity
- Actual Fossil Shown — no stock photos; what you see is what you get
- Scientifically Valuable — excellent preservation and a notable species for biostratigraphy
- Collectible & Educational — perfect for fossil enthusiasts, teachers, and geologists
Own a genuine and rare piece of Jurassic marine history with this superbly preserved Graphoceras concavum ammonite fossil, from one of the world’s most famous fossil-bearing coastlines.
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