Cardioceras cf intercalatumm Fossil Ammonite Oxfordian Jurassic France Genuine Authentic Specimen

Description

Authentic Jurassic Ammonite Fossil from France

This is a genuine Cardioceras cf. intercalatumm ammonite fossil, dating to the Lower Oxfordian Stage of the Jurassic Period. It was discovered in Neuvizy, Ardennes, France, a region renowned for its exceptional preservation of Oxfordian ammonites. The specimen is supplied with a Certificate of Authenticity, guaranteeing it as a genuine fossil. The fossil shown in the photographs is the exact piece you will receive, ensuring transparency and accuracy.

Geological Age and Provenance

The Oxfordian Stage marks the beginning of the Late Jurassic Epoch, approximately 163–157 million years ago. The Lower Oxfordian deposits of the Ardennes region in France are globally significant, offering well-preserved ammonites that serve as important tools for biostratigraphy. Neuvizy, in particular, has yielded numerous high-quality ammonite specimens, making it an important location for both collectors and researchers.

Scientific Classification

• Species: Cardioceras cf. intercalatumm
• Genus: Cardioceras
• Family: Cardioceratidae
• Superfamily: Stephanoceratoidea
• Order: Ammonitida
• Class: Cephalopoda
• Age: Lower Oxfordian, Jurassic Period
• Locality: Neuvizy, Dept. Ardennes, France

Morphological Features

This ammonite fossil demonstrates the typical characteristics of Cardioceras species:

• A moderately involute shell form with visible inner whorls.
• Distinctive ribbing that radiates outward from the umbilicus to the venter.
• Strongly ornamented ribs that are closely spaced, producing a striking surface texture.
• A rounded to slightly keeled venter, enhancing the hydrodynamic profile of the shell.

The designation “cf.” (confer) indicates that the fossil shares close morphological traits with Cardioceras intercalatumm but may represent a closely related form within the genus. This makes it particularly valuable for study and adds scientific intrigue for collectors.

Biostratigraphic and Scientific Importance

Cardioceras ammonites are crucial index fossils for the Oxfordian Stage. Their rapid evolutionary turnover and widespread distribution across Europe allow geologists to precisely date rock layers and correlate stratigraphic sequences between different regions. The presence of Cardioceras cf. intercalatumm helps define specific ammonite zones within the Lower Oxfordian, making this specimen an important reference piece in paleontological research.

Depositional Environment

During the Lower Oxfordian, much of northern France was covered by shallow, warm epicontinental seas. These environments supported diverse marine ecosystems in which ammonites like Cardioceras flourished. After death, the shells settled into soft marine sediments, where they were buried and gradually fossilised through mineralisation. The Ardennes deposits where this specimen was discovered represent one of these ancient seabeds, now preserved as a geological window into the Jurassic world.

Collector’s Appeal

This Cardioceras cf. intercalatumm ammonite combines scientific value with aesthetic appeal. Its ribbed structure and well-preserved form make it a striking display fossil, while its provenance from Neuvizy, France, enhances its desirability. Specimens from this region are sought after by collectors and institutions alike, as they represent classic examples of Oxfordian ammonites. This piece is ideal for fossil enthusiasts, educational purposes, or as a natural history showcase item.

Item Details

• Type: Fossil Ammonite – Cardioceras cf. intercalatumm
• Age: Lower Oxfordian, Jurassic Period (approx. 163–157 million years old)
• Location: Neuvizy, Ardennes, France
• Notable Features: Strong ribbing, involute shell, well-preserved ornamentation
• Scale: Rule squares/cube = 1 cm (see photo for accurate sizing)
• Authenticity: Supplied with a Certificate of Authenticity
• Specimen: The exact fossil in the photos is the one you will receive

A rare and scientifically significant Jurassic ammonite from France, offering both natural beauty and geological importance for discerning collectors.