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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Rare kosmoceras jasoni ammonite fossil block - upper oxford clay, callovian, jurassic: manor farm, oxford, uk
Rare kosmoceras jasoni ammonite fossil block - upper oxford clay, callovian, jurassic: manor farm, oxford, uk - Image 2
Rare kosmoceras jasoni ammonite fossil block - upper oxford clay, callovian, jurassic: manor farm, oxford, uk - Image 3

Rare kosmoceras jasoni ammonite fossil block – upper oxford clay, callovian, jurassic: manor farm, oxford, uk

Original price was: £84.00.Current price is: £67.20.

This listing is for a stunning Kosmoceras jasoni ammonite fossil block from the Upper Oxford Clay, Callovian stage of the Jurassic period. This exceptional specimen was sourced from Manor Farm, Oxford, UK, a renowned fossil-rich location known for its well-preserved ammonites.

Species: Kosmoceras jasoni

Age: Approx. 165 million years old (Middle Jurassic, Callovian)

Origin: Manor Farm, Oxford, United Kingdom

Formation: Upper Oxford Clay

About Kosmoceras jasoni

Kosmoceras jasoni is a species of ammonite from the Callovian stage of the Jurassic period. These ammonites are characterized by their ornate ribbing, prominent tubercles (knobs), and distinctive coiling patterns. They belonged to the Kosmoceratidae family, an extinct group of cephalopods that thrived in ancient marine environments. These creatures were free-swimming, predatory mollusks related to modern squids, cuttlefish, and nautiluses.

Key Features

  • 100% Genuine Fossil – No restorations, guaranteed authentic
  • Beautiful Detail & Preservation – Crisp ribbing and well-defined features
  • Historic & Scientific Value – A perfect specimen for collectors, educators, and enthusiasts
  • Sourced from the Alice Purnell Collection – One of the world’s most prestigious ammonite collections

Why Buy From Us?

  • All fossils are carefully chosen for their quality and authenticity
  • Each fossil comes with a Certificate of Authenticity
  • The fossil you see is the fossil you receive
  • Expert sourcing & handling – Fossils are cleaned, prepped, and treated professionally

Size Information

Scale rule squares = 1cm. Please refer to the photos for full sizing.

Ideal for Collectors and Enthusiasts

Whether you’re an avid fossil collector, a science enthusiast, or looking for a unique natural history display piece, this Kosmoceras jasoni ammonite fossil block is a stunning addition to any collection.

Shipping & Packaging

We take great care in securely packaging all fossils to ensure safe delivery. Shipping options available worldwide.

Invest in Prehistoric History

Own a piece of Earth’s ancient marine life with this remarkable Kosmoceras jasoni ammonite fossil. A timeless relic from the Jurassic seas.

Order now – this is a one-of-a-kind specimen.

(Actual as seen)

Only 1 left in stock

SKU: AF0196 Category:

Description

This listing is for a stunning Kosmoceras jasoni ammonite fossil block from the Upper Oxford Clay, Callovian stage of the Jurassic period. This exceptional specimen was sourced from Manor Farm, Oxford, UK, a renowned fossil-rich location known for its well-preserved ammonites.

Species: Kosmoceras jasoni

Age: Approx. 165 million years old (Middle Jurassic, Callovian)

Origin: Manor Farm, Oxford, United Kingdom

Formation: Upper Oxford Clay

About Kosmoceras jasoni

Kosmoceras jasoni is a species of ammonite from the Callovian stage of the Jurassic period. These ammonites are characterized by their ornate ribbing, prominent tubercles (knobs), and distinctive coiling patterns. They belonged to the Kosmoceratidae family, an extinct group of cephalopods that thrived in ancient marine environments. These creatures were free-swimming, predatory mollusks related to modern squids, cuttlefish, and nautiluses.

Key Features

  • 100% Genuine Fossil – No restorations, guaranteed authentic
  • Beautiful Detail & Preservation – Crisp ribbing and well-defined features
  • Historic & Scientific Value – A perfect specimen for collectors, educators, and enthusiasts
  • Sourced from the Alice Purnell Collection – One of the world’s most prestigious ammonite collections

Why Buy From Us?

  • All fossils are carefully chosen for their quality and authenticity
  • Each fossil comes with a Certificate of Authenticity
  • The fossil you see is the fossil you receive
  • Expert sourcing & handling – Fossils are cleaned, prepped, and treated professionally

Size Information

Scale rule squares = 1cm. Please refer to the photos for full sizing.

Ideal for Collectors and Enthusiasts

Whether you’re an avid fossil collector, a science enthusiast, or looking for a unique natural history display piece, this Kosmoceras jasoni ammonite fossil block is a stunning addition to any collection.

Shipping & Packaging

We take great care in securely packaging all fossils to ensure safe delivery. Shipping options available worldwide.

Invest in Prehistoric History

Own a piece of Earth’s ancient marine life with this remarkable Kosmoceras jasoni ammonite fossil. A timeless relic from the Jurassic seas.

Order now – this is a one-of-a-kind specimen.

Additional information

Weight 0.1 g
Dimensions 10 × 10 × 10 cm
Era

Jurassic
Origin

United Kingdom

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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