RARE Graphoceras scriptum Fossil Ammonite | Aalenian Jurassic | CALVADOS France | Genuine with COA

Description

RARE: Graphoceras scriptum Fossil Ammonite

Geological Age: Aalenian, Middle Jurassic (~174.1 to 170.3 million years ago)

Location Found: Calvados, Normandy, France

Fossil Type: Ammonite (Extinct Marine Cephalopod)

Species: Graphoceras scriptum

Order: Ammonitida

Superfamily: Hammatoceratoidea

Family: Graphoceratidae

 

Specimen Overview:

This rare ammonite specimen is Graphoceras scriptum, a beautiful and scientifically significant species from the Aalenian stage of the Middle Jurassic. It was discovered in the classic fossil-rich strata of Calvados, Normandy—an area renowned for Jurassic marine deposits.

The specimen pictured is the exact one you will receive. A 1cm scale rule cube is included in the image for accurate size reference. Please see the photograph for full sizing and preservation detail.

 

Geological Context & Depositional Environment:

During the Aalenian, the region of present-day Normandy was submerged beneath a shallow epicontinental sea. The sedimentation of calcareous clays and marls in these marine environments contributed to the excellent preservation of ammonites.

Graphoceras scriptum is characteristic of the Opalinum Zone within the Aalenian and serves as a key biostratigraphic marker across Europe. Fossils from this zone help in dating and correlating Jurassic marine sequences throughout the Tethyan and Boreal realms.

 

Morphology & Notable Features:

This ammonite exhibits a finely ribbed, involute shell with tight coiling and a relatively small umbilicus. The species is distinguished by its dense, sinuous ribbing that crosses the flanks and gently curves around the venter.

The pattern of the ribbing often appears script-like—hence the name scriptum—giving it a highly decorative appearance, which adds to its appeal among collectors and palaeontologists.

 

Authenticity & Guarantee:

All of our fossils are 100% genuine and come with a Certificate of Authenticity. This specimen has been carefully selected, cleaned, and stabilised to ensure its quality and longevity for display or research.

 

Perfect For:

• Fossil ammonite collectors
• Museum and educational collections
• Geological and stratigraphic study
• Decorative natural history displays or unique gifts

This authentic Graphoceras scriptum is a rare and elegant addition to any fossil collection—offering both scientific value and timeless beauty from the Jurassic seas of Calvados, France.