Orthogarantiana Ammonite Fossil Jurassic Bajocian Dorset UK Genuine Authentic Certificate COA

Description

Authentic Jurassic Fossil from Dorset, UK

This Orthogarantiana ammonite fossil is a genuine specimen from the Middle Bajocian stage of the Jurassic Period, discovered at Burton Bradstock in Dorset, United Kingdom. Dorset’s Jurassic Coast and inland exposures are celebrated for their rich fossil heritage, offering insights into marine life that thrived nearly 170 million years ago. The photographs show the exact specimen you will receive, with a 1 cm scale cube provided for accurate size reference. Each fossil is accompanied by a Certificate of Authenticity, confirming it is 100% genuine.

Geological Age and Provenance

The fossil originates from the Middle Bajocian stage of the Jurassic, approximately 170–168 million years ago. During this period, much of Dorset was covered by shallow seas connected to the Tethys Ocean. These warm marine environments were ideal habitats for ammonites and other cephalopods, as well as a variety of bivalves, gastropods, and marine reptiles. The sedimentary deposits at Burton Bradstock, composed of fine clays and limestones, preserved these marine creatures in remarkable detail, leaving behind scientifically valuable and visually striking fossils.

Species Identification and Classification

Orthogarantiana is classified within the class Cephalopoda, order Ammonitida, superfamily Stephanoceratoidea, and family Stephanoceratidae. The genus is a key marker of the Bajocian stage, with specimens widely distributed across Europe. Its distinct morphological features and stratigraphic position make it an important index fossil, used by geologists to date and correlate Middle Jurassic deposits. For collectors, Orthogarantiana represents both a scientifically significant fossil and an exceptional piece of natural history.

Morphology and Distinctive Traits

This ammonite exhibits the classic features of Orthogarantiana. The shell is planispiral, with moderately involute coiling and compressed whorls. Strong, regular ribs radiate across the flanks and extend seamlessly over the venter, forming a bold ornamental pattern characteristic of the genus. These ribs reinforced the shell and improved hydrodynamic efficiency, helping the ammonite manoeuvre effectively through Jurassic seas. The symmetry and elegance of the ribbing make this specimen both scientifically diagnostic and visually impressive.

Scientific and Stratigraphic Importance

Orthogarantiana fossils are invaluable for biostratigraphy. Their limited stratigraphic range within the Bajocian and distinctive morphology make them essential for identifying biozones, which help geologists construct detailed geological timescales and correlate layers across regions. Their presence in deposits like those at Burton Bradstock has been crucial in refining our understanding of Jurassic paleoenvironments and cephalopod evolution. For collectors, owning a specimen such as this means holding a direct piece of the fossil record that has helped shape geological science.

Condition and Presentation

The fossil has been professionally prepared to highlight its natural features. Ribbing, whorl shape, and overall shell morphology are preserved in excellent condition. It is a unique, one-of-a-kind specimen—never a reproduction or cast. The photographs provided show the actual specimen you will receive, ensuring complete confidence in its authenticity. Its fine preservation and natural beauty make it suitable for display, education, or research collections.

Guarantee of Authenticity

All of our fossils are 100% genuine, responsibly sourced, and scientifically identified. Each comes with a Certificate of Authenticity. This Orthogarantiana ammonite fossil from Burton Bradstock, Dorset, is a rare and scientifically valuable example of Middle Bajocian ammonites, making it an excellent choice for fossil collectors, natural history enthusiasts, and academic institutions.