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MORTONICERAS Ammonite Fossil Cretaceous Albian Texas USA

£18.00

This listing features a beautifully preserved Mortoniceras ammonite fossil, collected from the Duck Creek Formation, dating to the Upper Albian Stage of the Cretaceous period. This fossil was unearthed in Spring Creek, Cooke County, Texas, USA – a classic site known for yielding well-preserved marine fossils from the mid-Cretaceous.

The genus Mortoniceras is known for its strong ribbing and prominent tuberculate ornamentation. These ammonites were adapted to life in shallow marine settings and are frequently used as biostratigraphic markers for the Albian stage.

Geological & Scientific Details:

  • Genus: Mortoniceras
  • Family: Brancoceratidae
  • Superfamily: Acanthoceratoidea
  • Order: Ammonitida
  • Geological Period: Cretaceous
  • Geological Stage: Upper Albian
  • Formation: Duck Creek Formation
  • Location: Spring Creek, Cooke County, Texas, USA
  • Depositional Environment: Shallow marine – Western Interior Seaway
  • Morphology Features: Evolute shell with strong ribbing and ventrolateral tubercles; often forms distinctive spiral ridges

Why This Specimen Stands Out:

  • Excellent example of a Mortoniceras ammonite fossil
  • Prominent ribbing and defined tubercles
  • Sourced from a key fossil-rich locality in Texas
  • Ideal for collectors, educators, or display
  • Photo shows the actual fossil you will receive
  • Includes Certificate of Authenticity

Scale Reference: Scale Rule Squares / Cube = 1cm – See photo for exact sizing.

Shipping & Packaging:

  • Professionally packaged for safe worldwide delivery
  • Tracked international shipping available

This ammonite represents an important component of the Upper Albian fossil record and showcases the diversity and ornamentation of mid-Cretaceous ammonoids.

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

(Actual as seen)

Only 1 left in stock

SKU: UF3548 Category:

Description

This listing features a beautifully preserved Mortoniceras ammonite fossil, collected from the Duck Creek Formation, dating to the Upper Albian Stage of the Cretaceous period. This fossil was unearthed in Spring Creek, Cooke County, Texas, USA – a classic site known for yielding well-preserved marine fossils from the mid-Cretaceous.

The genus Mortoniceras is known for its strong ribbing and prominent tuberculate ornamentation. These ammonites were adapted to life in shallow marine settings and are frequently used as biostratigraphic markers for the Albian stage.

Geological & Scientific Details:

  • Genus: Mortoniceras
  • Family: Brancoceratidae
  • Superfamily: Acanthoceratoidea
  • Order: Ammonitida
  • Geological Period: Cretaceous
  • Geological Stage: Upper Albian
  • Formation: Duck Creek Formation
  • Location: Spring Creek, Cooke County, Texas, USA
  • Depositional Environment: Shallow marine – Western Interior Seaway
  • Morphology Features: Evolute shell with strong ribbing and ventrolateral tubercles; often forms distinctive spiral ridges

Why This Specimen Stands Out:

  • Excellent example of a Mortoniceras ammonite fossil
  • Prominent ribbing and defined tubercles
  • Sourced from a key fossil-rich locality in Texas
  • Ideal for collectors, educators, or display
  • Photo shows the actual fossil you will receive
  • Includes Certificate of Authenticity

Scale Reference: Scale Rule Squares / Cube = 1cm – See photo for exact sizing.

Shipping & Packaging:

  • Professionally packaged for safe worldwide delivery
  • Tracked international shipping available

This ammonite represents an important component of the Upper Albian fossil record and showcases the diversity and ornamentation of mid-Cretaceous ammonoids.

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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