Cretaceous stromatolite fossil – fossilised algae colony – bolivia – ancient microbial life – biofilm structure – geological display

Description Own a tangible piece of Earth’s biological heritage with this Cretaceous Stromatolite Fossil from Bolivia, a fossilised remnant of some of the oldest and most important lifeforms to have ever existed. Stromatolites are layered sedimentary formations created by ancient microbial mats—primarily cyanobacteria—that grew in shallow marine environments and played a major role in oxygenating Earth’s atmosphere. This specimen dates back to the Cretaceous Period (~145–66 million years ago), making it a relatively young stromatolite when compared to the oldest known examples, such as those from the Strelley Pool Formation in Australia, which are over 3.5 billion years old. These earliest stromatolites form a significant part of our understanding of early Earth and the origins of life. Stromatolites form through the trapping, binding, and cementation of sedimentary grains by biofilms of micro-organisms like cyanobacteria and algae. Over time, these layered accretionary structures became preserved as fossils in the rock record. The growth pattern creates a distinctive banded or domed appearance, making them visually and scientifically compelling. This particular piece from Bolivia showcases the classic layered texture, with subtle colour banding and fine biological structure. It is ideal for display, teaching, or scientific study. Item Details: Specimen: Stromatolite Species: Microbial/Algae Biofilm (likely cyanobacteria) Age: Cretaceous Location: Bolivia Type: Layered biochemical sedimentary fossil Scale Reference: Scale cube = 1cm (see photo for exact size) Certificate of Authenticity: Included ACTUAL AS SEEN: The image shows the exact specimen you will receive. Each fossil is hand-selected for quality and uniqueness and individually photographed. Measurements are approximate, as these are naturally irregular specimens. Colour may vary slightly depending on lighting conditions and screen settings. Please Note: Fossils may be propped for photography. Once sold, this listing will be updated with a new, similar specimen and a new image. We recommend saving or screenshotting the listing photo at the time of purchase for personal reference. Every specimen is archived by us with its original images to ensure traceability. 100% Genuine Fossil – Professionally Hand-Selected – Certificate of Authenticity Included Explore the ancient microbial origins of life on Earth with this fascinating and beautifully preserved stromatolite specimen from the Cretaceous seas of Bolivia.