Scientists stunned to find signs of ancient life in a place no one expected

Scientists who are studying ancient rocks have observed unusual wrinkle-like structures in the deep-sea sediment, which was formed 180 million years ago in Morocco, during the Early Jurassic period. This discovery might tell us that microbes were thriving in the deep ocean waters where no sunlight reached, and were using chemical energy for the process. This has changed the traditional understanding of where such structures can form. These structures were observed in the sedimentary rocks that have risen from the ocean floor in the Dadès Valley region of Morocco because of geological activity. These unusual wrinkle-like structures in the sedimentary rocks in 2016 by Geologist Rowan Martindale. These structures resemble the formation of microbial mat structures that usually occur in shallow ocean environments (Harvard OEB, 2026).

The sediments that contain the wrinkles were formed at depths that went beyond 180 meters, which is well below the ocean’s photic zone, where sunlight cannot reach. This means the microbes that are responsible for the structures could not have relied on photosynthesis. Researchers instead concluded that the organisms must have used a process known as chemosynthesis, in which microbes gain energy from chemical reactions rather than sunlight (ScienceDaily, 2026). This interpretation is supported by the chemical analysis of the rocks. Scientists detected elevated carbon concentrations beneath the wrinkle structures, which is a pattern often linked with microbial activity. Biological processes contributed to the formation of the wrinkles, and microbial mats had once covered the ancient seafloor, as supported by the carbon enrichment (ScienceDaily, 2026).

Researchers compared the Jurassic wrinkle textures with modern deep-sea microbial mats observed today to better understand the fossils. Scientists have been able to document these living microbial communities in dark ocean environments such as hydrothermal vent systems by using remotely operated vehicles. These microbes also depend on chemical reactions for energy rather than sunlight. The similarities between modern and ancient structures could tell us that the Jurassic wrinkles formed through similar biological processes (Earth.com, 2026). The preservation of the wrinkles was made possible by the type of sediment in which they formed. The structures occur within turbidite deposits, which are sediments produced by underwater landslides that rapidly bury material on the seafloor. The delicate microbial textures from erosion and decay were protected by rapid burial and low oxygen conditions (Harvard OEB, 2026).

Some wrinkle structures are normally associated with much older rocks, especially those that were formed before complex animals became widespread. They often disturbed microbial mats by feeding or burrowing through sediments after animals evolved. Wrinkle structures are rarely preserved in rocks younger than about 540 million years because of this. The discovery in Jurassic rocks shows that microbial mats still exist in certain environments even after animal life became dominant (ScienceDaily, 2026).

The discovery, however, is not limited to Earth’s history. The fact that life can exist without sunlight gives us an important example for astrobiology, which is similar to dark and energy-light conditions that can occur on other planets. Scientists are provided with an example of where to find life elsewhere in the universe by studying ancient chemosynthetic life on our own planet (ScienceDaily, 2026). The Moroccan wrinkle fossils show that ancient life on Earth was more diverse than we once believed and indicate that life could flourish in dark, deep-sea environments long before many modern ocean systems began to develop.