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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Cotham Marble Stromatolite Fossil Section – Triassic Age from Bristol, UK – Rare Cyanobacteria Formation – Certificate Included

Cotham Marble Stromatolite Fossil Section – Triassic Age from Bristol, UK – Rare Cyanobacteria Formation – Certificate Included

Original price was: £28.80.Current price is: £25.92.

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

 

**Please note: Some fossils maybe propped up for photo purposes**

Specimen: Stromatolite Section

Age: Cotham Marble, Triassic

Location: Bristol, UK

Size (picture scale cube=1cm): 120 x 45 x 11mm (4.72 x 1.77 x 0.43 inches)

 

ACTUAL AS SEEN: The image shows the EXACT specimen you will receive. The specimen has been carefully hand selected and photographed. Measurements are as accurate as possible, though be aware measuring precise dimensions can be difficult from irregular shaped items. Whilst we portray colours as close to life-like as we can, colours will vary if taken in sunlight, indoors, from monitor to monitor and device to device. Once this specimen is sold, we will update this listing with new similar selected item, with a new photo and dimensions.

(Actual as seen)

Only 1 left in stock

SKU: FP9911 Category:

Description

This listing features a genuine Stromatolite fossil section cut and polished from the famous Cotham Marble, a distinctive limestone formation from the Late Triassic Period (~201–205 million years ago). This rare specimen was found in Bristol, UK, a site renowned for its exceptional preservation of prehistoric microbial structures.

Stromatolites are layered structures formed by the growth of cyanobacteria—among the earliest life forms on Earth. These microorganisms formed sticky mats that trapped sediment, slowly building up layered structures over time. Fossils such as this provide an extraordinary window into ancient microbial life and Earth’s early biosphere.

The Cotham Marble is not a true marble but a highly decorative limestone known for its unique patterning. These patterns represent fossilised algal mats that developed in a shallow lagoonal environment during the late Triassic. It has long fascinated both geologists and fossil collectors alike, as it preserves some of the clearest examples of early microbial ecosystems.

The surface has been polished to enhance visibility of the fine banding and layering, making this piece not only a valuable scientific specimen but also an aesthetically striking display item.

Item Details:

  • Specimen: Stromatolite Fossil Section
  • Formation: Cotham Marble
  • Age: Late Triassic Period (~201–205 million years ago)
  • Location: Bristol, UK
  • Scale Reference: Scale cube = 1cm. Please refer to photos for full sizing.
  • Certificate of Authenticity: Included

ACTUAL AS SEEN: The image shows the exact specimen you will receive. Each fossil is individually selected and professionally photographed to ensure you get the precise item as described.

Please Note:

  • Some fossils may be gently propped for photography purposes.
  • Size and colouration may vary slightly depending on lighting conditions and monitor settings.
  • Once sold, this listing will be updated with a new similar item.
  • We recommend saving or screenshotting your purchase image for personal reference, as listings refresh with each new specimen.
  • All images are archived for verification.

100% Genuine Fossil – Professionally Selected – Certificate of Authenticity Included

Additional information

Weight 10 g
Era

Triassic
Origin

United Kingdom

Triassic Information

The Triassic Period (252–201 million years ago) marked the beginning of the Mesozoic Era, following the Permian-Triassic mass extinction, the most severe extinction event in Earth's history. The climate was hot and dry, with vast deserts and little polar ice. Life slowly recovered, leading to the rise of the first dinosaurs, pterosaurs (flying reptiles), and early mammals. Reptiles, including large archosaurs (ancestors of crocodiles and dinosaurs), dominated both land and sea. In the oceans, ichthyosaurs and plesiosaurs thrived alongside ammonites and early coral reefs. The first true conifers and ginkgo trees spread across the land. The period ended with another mass extinction, paving the way for the Jurassic and the golden age of dinosaurs.

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