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Garantiana Fossil Ammonite – Upper Bajocian, Jurassic, Eurecy Calvados France – Genuine + COA
Garantiana Fossil Ammonite – Upper Bajocian, Jurassic, Eurecy Calvados France – Genuine + COA - Image 2

Garantiana Fossil Ammonite – Upper Bajocian, Jurassic, Eurecy Calvados France – Genuine + COA

THB ฿796.23

A fine example of a Garantiana Fossil Ammonite, from the Upper Bajocian Stage of the Jurassic Period, collected near Eurecy, Calvados, Normandy, France. This ammonite is a characteristic representative of the genus Garantiana, well-known for its ribbed shell and its importance as a biostratigraphic marker. The exact fossil shown in the photograph is the one you will receive, and it is supplied with a Certificate of Authenticity.

Fossil Type & Species:

  • Type: Ammonite (extinct marine cephalopod)
  • Genus: Garantiana (exact species not specified)
  • Order: Ammonitida
  • Superfamily: Stephanoceratoidea
  • Family: Stephanoceratidae

Geological Context:

  • Period: Jurassic
  • Epoch/Stage: Middle Jurassic – Upper Bajocian (approx. 170.3 to 168.3 million years ago)
  • Biozone: Garantiana Zone – a key ammonite biozone widely recognised across NW Europe
  • Depositional Environment: Shallow marine environment with alternating marl and limestone beds, ideal for preserving ammonites

Locality:

  • Region: Eurecy, Calvados, Normandy, France
  • Formation: Bajocian sedimentary sequences of the Paris Basin (specific stratigraphy not confirmed)

Morphology & Features:

  • Evolute shell with wide umbilicus
  • Strong, dense ribbing typical of Garantiana
  • Ribs bifurcate low on the flanks and extend across the rounded venter
  • Consistent ornamentation gives it a distinctive appearance, useful in biostratigraphic correlation

Scientific Notes:

  • Garantiana species have long been used as biostratigraphic index fossils, helping to define and correlate the Upper Bajocian across Europe
  • First described in the 19th century and central to Jurassic ammonite taxonomy

Notable Details:

  • Natural, unrestored specimen with excellent preservation
  • Displays diagnostic ribbing and morphology
  • Scale Reference: Each square or cube in the photo = 1cm. Please check the image for accurate sizing

Authenticity & Guarantee: All of our fossils are 100% genuine, responsibly sourced, and come with a Certificate of Authenticity. The fossil you see is the exact specimen you will receive.

 

This Garantiana ammonite is a scientifically important and attractive fossil, ideal for collectors, display, or educational purposes.

(Actual as seen)

Includes a fully hand-signed Premium Certificate of Authenticity.

Only 1 left in stock

SKU: UF4274 Category:

Description

A fine example of a Garantiana Fossil Ammonite, from the Upper Bajocian Stage of the Jurassic Period, collected near Eurecy, Calvados, Normandy, France. This ammonite is a characteristic representative of the genus Garantiana, well-known for its ribbed shell and its importance as a biostratigraphic marker. The exact fossil shown in the photograph is the one you will receive, and it is supplied with a Certificate of Authenticity.

Fossil Type & Species:

  • Type: Ammonite (extinct marine cephalopod)
  • Genus: Garantiana (exact species not specified)
  • Order: Ammonitida
  • Superfamily: Stephanoceratoidea
  • Family: Stephanoceratidae

Geological Context:

  • Period: Jurassic
  • Epoch/Stage: Middle Jurassic – Upper Bajocian (approx. 170.3 to 168.3 million years ago)
  • Biozone: Garantiana Zone – a key ammonite biozone widely recognised across NW Europe
  • Depositional Environment: Shallow marine environment with alternating marl and limestone beds, ideal for preserving ammonites

Locality:

  • Region: Eurecy, Calvados, Normandy, France
  • Formation: Bajocian sedimentary sequences of the Paris Basin (specific stratigraphy not confirmed)

Morphology & Features:

  • Evolute shell with wide umbilicus
  • Strong, dense ribbing typical of Garantiana
  • Ribs bifurcate low on the flanks and extend across the rounded venter
  • Consistent ornamentation gives it a distinctive appearance, useful in biostratigraphic correlation

Scientific Notes:

  • Garantiana species have long been used as biostratigraphic index fossils, helping to define and correlate the Upper Bajocian across Europe
  • First described in the 19th century and central to Jurassic ammonite taxonomy

Notable Details:

  • Natural, unrestored specimen with excellent preservation
  • Displays diagnostic ribbing and morphology
  • Scale Reference: Each square or cube in the photo = 1cm. Please check the image for accurate sizing

Authenticity & Guarantee: All of our fossils are 100% genuine, responsibly sourced, and come with a Certificate of Authenticity. The fossil you see is the exact specimen you will receive.

 

This Garantiana ammonite is a scientifically important and attractive fossil, ideal for collectors, display, or educational purposes.

Additional information

Era

Jurassic
Origin

France

Jurassic Information

The Jurassic Period (201–145 million years ago) was the golden age of dinosaurs, with iconic species like Brachiosaurus, Stegosaurus, and Allosaurus dominating the land. It was a time of warm, humid climates, with high sea levels that created vast shallow seas, supporting abundant marine reptiles, ammonites, and early coral reefs. The first birds, such as Archaeopteryx, evolved from small theropod dinosaurs, while early mammals remained small and nocturnal. Lush forests of cycads, conifers, and ferns covered the land, providing food for giant herbivores. The breakup of the supercontinent Pangaea accelerated, shaping Earth's geography and setting the stage for the diverse ecosystems of the Cretaceous.

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