Parkinsonia gonolkites convergens Ammonite Fossil Jurassic Bajocian Dorset UK Authentic COA

Description

Genuine Jurassic Fossil from Dorset, UK

This Parkinsonia gonolkites convergens ammonite fossil is a rare and authentic specimen from the Middle Bajocian stage of the Jurassic Period, discovered at Burton Bradstock, Dorset, United Kingdom. Dorset is globally renowned for its Jurassic Coast, a UNESCO World Heritage Site, and inland fossil-bearing sites that reveal extraordinary insights into life approximately 170 million years ago. The specimen pictured is the exact fossil you will receive, photographed with a 1 cm scale cube for accurate sizing. Each fossil comes with a Certificate of Authenticity, guaranteeing it as a 100% genuine specimen.

Geological Age and Provenance

The ammonite originates from the Middle Bajocian stage of the Jurassic, dated to around 170–168 million years ago. During this time, Dorset lay beneath a shallow, warm sea that formed part of the greater Tethys Ocean system. Sediments of limestone and clay accumulated on the seabed, preserving the remains of marine creatures including ammonites, belemnites, brachiopods, and marine reptiles. The Burton Bradstock locality is especially significant, producing ammonites that are crucial for refining Jurassic stratigraphy.

Taxonomy and Classification

Parkinsonia gonolkites convergens belongs to the class Cephalopoda, order Ammonitida, superfamily Perisphinctoidea, and family Parkinsoniidae. Ammonites of the genus Parkinsonia are particularly important as stratigraphic markers in Jurassic geology. Their distinct features, combined with their restricted stratigraphic ranges, make them highly useful as index fossils. Specimens such as this one have helped paleontologists correlate Bajocian deposits across Europe with remarkable precision.

Morphology and Distinctive Features

This specimen displays the diagnostic characteristics of Parkinsonia gonolkites convergens. The shell is evolute, with whorls that are only slightly overlapping, creating a wide umbilicus that allows multiple whorls to be seen clearly. Its ribs are fine, dense, and regularly spaced, radiating strongly from the umbilical margin across the flanks and sweeping over the venter. These features give the ammonite a finely ornamented appearance, distinct from more robustly ribbed species. The overall morphology not only aids in identification but also offers aesthetic appeal for collectors.

Scientific and Stratigraphic Importance

As an ammonite of the Bajocian stage, Parkinsonia gonolkites convergens is significant for its role in defining biostratigraphic zones. Its presence marks specific intervals within the Middle Jurassic, allowing geologists to subdivide rock layers and build accurate correlations across different regions. Such fossils are vital for reconstructing paleoecological conditions, including sea-level changes, sedimentary environments, and cephalopod evolutionary trends. Owning a specimen like this provides not only a stunning display piece but also a fossil of genuine scientific relevance.

Condition and Presentation

This fossil has been carefully prepared to reveal its fine ribbing and overall structure, which are preserved in exceptional detail. Its natural features are clearly visible, showcasing the evolutionary design of this ammonite species. The photographs provided are of the exact specimen, ensuring that you know precisely what you are purchasing. It is not a replica or reproduction but a unique, natural fossil suitable for display in personal collections, museums, or educational institutions.

Guarantee of Authenticity

All of our fossils are 100% genuine and responsibly sourced. Each specimen is scientifically identified and supplied with a Certificate of Authenticity for complete confidence. This Parkinsonia gonolkites convergens ammonite from Burton Bradstock, Dorset, is a scientifically valuable and visually striking fossil, making it a prized addition for collectors, educators, and natural history enthusiasts alike.