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RARE 7" Fossil Ammonite Eopachydiscus marcianus | Upper Albian Cretaceous | North Texas USA | Authentic Certified Specimen
RARE 7" Fossil Ammonite Eopachydiscus marcianus | Upper Albian Cretaceous | North Texas USA | Authentic Certified Specimen - Image 2

RARE 7″ Fossil Ammonite Eopachydiscus marcianus | Upper Albian Cretaceous | North Texas USA | Authentic Certified Specimen

£48.00

Presenting a RARE 7″ fossil ammonite, Eopachydiscus marcianus, an outstanding specimen from the Upper Albian Stage of the Cretaceous Period, discovered in North Texas, USA. This striking ammonite fossil displays exquisite preservation and morphology characteristic of mid-Cretaceous ammonoids.

Collected from a marine sedimentary context, this ammonite belonged to an extinct group of fast-swimming marine cephalopods, and this specimen reflects the robust coiling and defined ornamentation of the species. It is a show-stopping fossil ideal for collectors and educators alike.

 

Geological & Palaeontological Details:

  • Species: Eopachydiscus marcianus
  • Geological Period: Cretaceous
  • Geological Stage: Upper Albian (~105–100.5 million years ago)
  • Locality: North Texas, USA
  • Depositional Environment: Shallow epicontinental sea with carbonate and marl sedimentation
  • Order: Ammonitida
  • Superfamily: Desmoceratoidea
  • Family: Pachydiscidae
  • Zone/Biozone: Commonly found in association with the Mortoniceras inflatum and Hysteroceras biozones
  • Formal Identification: Originally described by Reeside and others in regional North American ammonite studies

 

Morphological Features:

  • Strong, inflated whorl section typical of Eopachydiscus
  • Bold ribbing and deep umbilicus with suture line visible on some parts of the shell
  • Exhibits growth lines and mineral preservation detail
  • Pale earthy tones with natural calcitic overprint

 

Notable Information:

  • A key index fossil for regional stratigraphy in the Gulf Coast and Western Interior Seaway
  • Sought after for its rarity and size in North American ammonite collections
  • Great teaching specimen or centerpiece for display

 

Authenticity & Presentation:

  • 100% Genuine Fossil Specimen – not a cast or replica
  • Accompanied by a Certificate of Authenticity
  • You will receive the exact fossil pictured in the listing
  • Scale Cube = 1cm – full sizing in photo

 

This 7″ Eopachydiscus marcianus ammonite is a remarkable relic of the Cretaceous marine world of Texas, offered as a high-quality certified fossil from a carefully curated collection.

 

All of our Fossils are 100% Genuine Specimens & come with a Certificate of Authenticity.

(Actual as seen)

Only 1 left in stock

SKU: UF3794 Category:

Description

Presenting a RARE 7″ fossil ammonite, Eopachydiscus marcianus, an outstanding specimen from the Upper Albian Stage of the Cretaceous Period, discovered in North Texas, USA. This striking ammonite fossil displays exquisite preservation and morphology characteristic of mid-Cretaceous ammonoids.

Collected from a marine sedimentary context, this ammonite belonged to an extinct group of fast-swimming marine cephalopods, and this specimen reflects the robust coiling and defined ornamentation of the species. It is a show-stopping fossil ideal for collectors and educators alike.

 

Geological & Palaeontological Details:

  • Species: Eopachydiscus marcianus
  • Geological Period: Cretaceous
  • Geological Stage: Upper Albian (~105–100.5 million years ago)
  • Locality: North Texas, USA
  • Depositional Environment: Shallow epicontinental sea with carbonate and marl sedimentation
  • Order: Ammonitida
  • Superfamily: Desmoceratoidea
  • Family: Pachydiscidae
  • Zone/Biozone: Commonly found in association with the Mortoniceras inflatum and Hysteroceras biozones
  • Formal Identification: Originally described by Reeside and others in regional North American ammonite studies

 

Morphological Features:

  • Strong, inflated whorl section typical of Eopachydiscus
  • Bold ribbing and deep umbilicus with suture line visible on some parts of the shell
  • Exhibits growth lines and mineral preservation detail
  • Pale earthy tones with natural calcitic overprint

 

Notable Information:

  • A key index fossil for regional stratigraphy in the Gulf Coast and Western Interior Seaway
  • Sought after for its rarity and size in North American ammonite collections
  • Great teaching specimen or centerpiece for display

 

Authenticity & Presentation:

  • 100% Genuine Fossil Specimen – not a cast or replica
  • Accompanied by a Certificate of Authenticity
  • You will receive the exact fossil pictured in the listing
  • Scale Cube = 1cm – full sizing in photo

 

This 7″ Eopachydiscus marcianus ammonite is a remarkable relic of the Cretaceous marine world of Texas, offered as a high-quality certified fossil from a carefully curated collection.

 

All of our Fossils are 100% Genuine Specimens & come with a Certificate of Authenticity.

Additional information

Era

Cretaceous
Origin

USA

Cretaceous Information

The Cretaceous Period (145–66 million years ago) was the final era of the Mesozoic, marked by the dominance of dinosaurs and the rise of flowering plants. It had a warm, greenhouse climate, with high sea levels that created vast shallow inland seas. Marine life flourished, including mosasaurs, ammonites, and rudist reefs, while the land was ruled by iconic dinosaurs like Tyrannosaurus rex, Triceratops, and Spinosaurus. Mammals and birds diversified, and insects thrived. The period ended with the mass extinction event, likely caused by an asteroid impact, wiping out the dinosaurs and paving the way for the rise of mammals in the Cenozoic.

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