Fossils for Sale - High-quality BRITISH and WORLDWIDE Fossils. An impressive selection of fossils, including Ammonites, Trilobites, Belemnites, Fossil Fish, Fossil Shark Teeth, Fossilised Insects in Amber, Dinosaurs, and Reptiles. UK Fossils was formed in 1988 and collects and preps our own fossils in the heart of the Jurassic Coast, collecting fossils from Lyme Regis, Charmouth and Somerset. Our passion for fossils is reflected in our carefully curated collection, which includes some of the rarest and most unique specimens available.

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GIANT 15″ TROPAEUM SUBARCTICUM M Ammonite Fossil – Rare Cretaceous Specimen, Aptian, Maidstone, UK

£480.00

This listing offers a truly exceptional and rare giant ammonite fossil, TROPAEUM SUBARCTICUM M, measuring an impressive 15 inches in diameter. This Cretaceous-era specimen dates back to the Aptian stage (~120 million years ago) and was discovered in Maidstone, United Kingdom. Large, well-preserved ammonites from this formation are incredibly rare, making this an outstanding find for serious collectors

Fossil Information:

  • Species: TROPAEUM SUBARCTICUM M (Extinct Ammonite)
  • Geological Period: Early Cretaceous (Aptian, ~120 million years ago)
  • Formation: Aptian Deposits
  • Location: Maidstone, United Kingdom
  • Size: 15 inches (38 cm) in diameter
  • Preservation: Excellent – retains intricate shell structure and natural features

Key Features:

A rare and giant ammonite fossil – an impressive display piece

Exceptional preservation, showcasing intricate growth lines and suture patterns

Highly sought-after specimen from the Aptian stage of the Cretaceous period

Discovered in Maidstone, a well-known UK fossil locality

Comes with a Certificate of Authenticity

Scientific & Historical Significance:

Ammonites like Tropeum subarcticum were prehistoric marine mollusks that thrived in ancient seas during the Early Cretaceous period. Their distinctive, coiled shells served as protective armor and enabled buoyancy, making them highly successful marine predators.

The Aptian deposits of Maidstone have yielded some of the finest ammonite fossils in the UK, known for their size, preservation, and historical importance. Large specimens like this are particularly valuable as they provide insight into the evolution and diversity of ammonite species during the Cretaceous period.

Authenticity & Certification:

All of our fossils are 100% genuine specimens and come with a Certificate of Authenticity. The exact fossil in the listing photos is the one you will receive.

Why Buy From Us?

This specimen originates from the Alice Purnell Collection, one of the largest and most prestigious ammonite collections in the world. We specialize in museum-quality fossils, carefully prepared and sourced to ensure authenticity and scientific value.

This massive 15-inch Tropeum subarcticum ammonite fossil is a true collector’s item, ideal for display, research, or investment. A remarkable opportunity to own a significant piece of Earth’s ancient history!

(Actual as seen)

Includes a fully hand-signed Premium Certificate of Authenticity.

Out of stock

SKU: AF0453 Category:

Description

This listing offers a truly exceptional and rare giant ammonite fossil, TROPAEUM SUBARCTICUM M, measuring an impressive 15 inches in diameter. This Cretaceous-era specimen dates back to the Aptian stage (~120 million years ago) and was discovered in Maidstone, United Kingdom. Large, well-preserved ammonites from this formation are incredibly rare, making this an outstanding find for serious collectors

Fossil Information:

  • Species: TROPAEUM SUBARCTICUM M (Extinct Ammonite)
  • Geological Period: Early Cretaceous (Aptian, ~120 million years ago)
  • Formation: Aptian Deposits
  • Location: Maidstone, United Kingdom
  • Size: 15 inches (38 cm) in diameter
  • Preservation: Excellent – retains intricate shell structure and natural features

Key Features:

A rare and giant ammonite fossil – an impressive display piece

Exceptional preservation, showcasing intricate growth lines and suture patterns

Highly sought-after specimen from the Aptian stage of the Cretaceous period

Discovered in Maidstone, a well-known UK fossil locality

Comes with a Certificate of Authenticity

Scientific & Historical Significance:

Ammonites like Tropeum subarcticum were prehistoric marine mollusks that thrived in ancient seas during the Early Cretaceous period. Their distinctive, coiled shells served as protective armor and enabled buoyancy, making them highly successful marine predators.

The Aptian deposits of Maidstone have yielded some of the finest ammonite fossils in the UK, known for their size, preservation, and historical importance. Large specimens like this are particularly valuable as they provide insight into the evolution and diversity of ammonite species during the Cretaceous period.

Authenticity & Certification:

All of our fossils are 100% genuine specimens and come with a Certificate of Authenticity. The exact fossil in the listing photos is the one you will receive.

Why Buy From Us?

This specimen originates from the Alice Purnell Collection, one of the largest and most prestigious ammonite collections in the world. We specialize in museum-quality fossils, carefully prepared and sourced to ensure authenticity and scientific value.

This massive 15-inch Tropeum subarcticum ammonite fossil is a true collector’s item, ideal for display, research, or investment. A remarkable opportunity to own a significant piece of Earth’s ancient history!

Additional information

Weight 0.1 g
Dimensions 10 × 10 × 10 cm
Era

Cretaceous

Origin

United Kingdom

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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