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: 7" Shirbuirnia trigonalis Fossil Ammonite - Middle Bajocian, Jurassic - Horn Park, Dorset, UK - Genuine with COA
RARE: 7" Shirbuirnia trigonalis Fossil Ammonite - Middle Bajocian, Jurassic - Horn Park, Dorset, UK - Genuine with COA - Image 2

RARE: 7″ Shirbuirnia trigonalis Fossil Ammonite – Middle Bajocian, Jurassic – Horn Park, Dorset, UK – Genuine with COA

£60.00

RARE: 7″ Shirbuirnia trigonalis Fossil Ammonite – Middle Bajocian, Jurassic – Horn Park, Dorset, UK

100% Genuine Fossil with Certificate of Authenticity

We are excited to present this 7″ Shirbuirnia trigonalis fossil ammonite collected from Horn Park, Dorset, United Kingdom. This fossil dates back to the Middle Bajocian, Jurassic Period (~170 million years ago). The Shirbuirnia trigonalis ammonite is a rare and stunning specimen that showcases the intricate spiral structure typical of ammonites from the Bajocian period.

Geological and Fossil Information:

  • Fossil Type: Shirbuirnia trigonalis Fossil Ammonite
  • Species: Shirbuirnia trigonalis
  • Morphology Features: This Shirbuirnia ammonite is characterized by its distinctive spiral shape, smooth ribbing, and strong suture lines. Its well-preserved, large size and symmetrical form make it a remarkable example of Middle Bajocian ammonites.
  • Geological Stage: Middle Bajocian, Jurassic (~170 million years ago)
  • Depositional Environment: The fossil was formed in a shallow marine environment, typical of the Bajocian period, where ammonites thrived in warm, clear seas. The Jurassic Coast in Dorset, UK provides ideal conditions for the preservation of Jurassic marine life.
  • Biozone: The Shirbuirnia trigonalis fossil belongs to the Bajocian biozone, which represents the flourishing of ammonites and other marine organisms during this time.
  • Family: Desmoceratidae
  • Super Family: Ammonoidea
  • Order: Ammonitida
  • Formally Identified By: This fossil has been professionally identified based on its distinctive spiral form and ribbed texture, along with its geological context from Horn Park, Dorset, ensuring its authenticity.

Size and Visuals:

The fossil measures approximately 7 inches in diameter. A scale rule (1cm squares) is included in the attached photo for accurate size reference. The photo shows the actual specimen you will receive, carefully selected to highlight its intricate details and exceptional preservation.

Authenticity and Certification:

All of our fossils are 100% genuine specimens and come with a Certificate of Authenticity, ensuring the provenance and authenticity of the fossil. This Shirbuirnia trigonalis ammonite from the Middle Bajocian, Jurassic Period, is a rare and beautifully preserved example of Jurassic marine life, making it an exceptional addition to any fossil collection.

(Actual as seen)

Only 1 left in stock

SKU: UF4179 Category:

Description

RARE: 7″ Shirbuirnia trigonalis Fossil Ammonite – Middle Bajocian, Jurassic – Horn Park, Dorset, UK

100% Genuine Fossil with Certificate of Authenticity

We are excited to present this 7″ Shirbuirnia trigonalis fossil ammonite collected from Horn Park, Dorset, United Kingdom. This fossil dates back to the Middle Bajocian, Jurassic Period (~170 million years ago). The Shirbuirnia trigonalis ammonite is a rare and stunning specimen that showcases the intricate spiral structure typical of ammonites from the Bajocian period.

Geological and Fossil Information:

  • Fossil Type: Shirbuirnia trigonalis Fossil Ammonite
  • Species: Shirbuirnia trigonalis
  • Morphology Features: This Shirbuirnia ammonite is characterized by its distinctive spiral shape, smooth ribbing, and strong suture lines. Its well-preserved, large size and symmetrical form make it a remarkable example of Middle Bajocian ammonites.
  • Geological Stage: Middle Bajocian, Jurassic (~170 million years ago)
  • Depositional Environment: The fossil was formed in a shallow marine environment, typical of the Bajocian period, where ammonites thrived in warm, clear seas. The Jurassic Coast in Dorset, UK provides ideal conditions for the preservation of Jurassic marine life.
  • Biozone: The Shirbuirnia trigonalis fossil belongs to the Bajocian biozone, which represents the flourishing of ammonites and other marine organisms during this time.
  • Family: Desmoceratidae
  • Super Family: Ammonoidea
  • Order: Ammonitida
  • Formally Identified By: This fossil has been professionally identified based on its distinctive spiral form and ribbed texture, along with its geological context from Horn Park, Dorset, ensuring its authenticity.

Size and Visuals:

The fossil measures approximately 7 inches in diameter. A scale rule (1cm squares) is included in the attached photo for accurate size reference. The photo shows the actual specimen you will receive, carefully selected to highlight its intricate details and exceptional preservation.

Authenticity and Certification:

All of our fossils are 100% genuine specimens and come with a Certificate of Authenticity, ensuring the provenance and authenticity of the fossil. This Shirbuirnia trigonalis ammonite from the Middle Bajocian, Jurassic Period, is a rare and beautifully preserved example of Jurassic marine life, making it an exceptional addition to any fossil collection.

Additional information

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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