Rare Echioceras raricostatum Ammonite Fossil Jurassic Radstock UK Genuine Authentic COA

Description

Authentic Jurassic Fossil from Radstock, UK

This rare Echioceras raricostatum ammonite fossil is a superb specimen from the Upper Sinemurian stage of the Early Jurassic, discovered in Radstock, Somerset, United Kingdom. It represents an extinct marine cephalopod preserved for nearly 195 million years. The photographs show the exact specimen you will receive, with a 1 cm scale cube included for accurate sizing. Every piece we offer is 100% genuine and is supplied with a Certificate of Authenticity for complete assurance.

Geological Age and Provenance

The fossil originates from the Upper Sinemurian stage of the Early Jurassic, approximately 197–190 million years ago. During this time, Radstock was submerged beneath shallow epicontinental seas, which formed part of a broad marine system across Europe. Fine mudstones and silts accumulated on the seafloor, producing conditions that were ideal for fossilisation. These deposits belong to the famous Lower Lias formations, which are renowned worldwide for their abundance of exceptionally preserved ammonites. Fossils from this interval represent a critical stage in ammonite diversification following the end-Triassic extinction.

Species Identification and Classification

Echioceras raricostatum is part of the class Cephalopoda, order Ammonitida, and belongs to the family Echioceratidae. The genus Echioceras is distinguished by its compressed, planispiral whorls and distinct ribbing patterns. The species raricostatum is particularly significant, as it gives its name to the Raricostatum Zone, an internationally recognised ammonite biozone used by geologists to correlate Jurassic strata across Europe. This makes the species not only a striking fossil for collectors but also an essential marker in Jurassic stratigraphy.

Morphology and Notable Traits

The specimen displays the diagnostic traits of Echioceras raricostatum, including widely spaced ribs that extend across the shell’s flanks and a compressed whorl section. The ribbing pattern is elegant and distinctive, contributing both scientific and aesthetic value. These features reflect the evolutionary adaptations of the species, which may have helped to reinforce the shell structure and optimise hydrodynamics as the animal navigated Jurassic seas. Such clear preservation of ribbing and whorl structure makes this fossil particularly desirable for collectors and researchers.

Scientific and Stratigraphic Importance

This species holds special importance in geology and paleontology. As the defining fossil of the Raricostatum Zone, Echioceras raricostatum is an invaluable index fossil. Its distribution allows geologists to date and correlate sedimentary layers with precision, providing insights into the environmental and biological changes of the Early Jurassic seas. Fossils like this are crucial for building an accurate geological timescale and for reconstructing ancient ecosystems. For collectors, owning a specimen of raricostatum is to possess a fossil that has been central to paleontological research for centuries.

Condition and Presentation

The fossil has been professionally prepared to showcase its natural details while preserving its authenticity. The ribbing, shell curvature, and compressed whorls are sharply defined, presenting the key traits of the species in outstanding clarity. This is not a reproduction or cast—it is a unique specimen formed millions of years ago. The images provided show the actual ammonite you will receive, ensuring complete confidence in its authenticity and presentation.

Guarantee of Authenticity

All of our fossils are guaranteed to be 100% genuine, responsibly sourced, and scientifically identified. Each specimen comes with a Certificate of Authenticity to verify its provenance. This rare Echioceras raricostatum ammonite fossil from Radstock is both scientifically important and visually striking, making it a valuable addition for fossil collectors, natural history enthusiasts, and educators alike.