The steps that the Municipality of Anticosti Island (Québec, Canada) and its many partners are taking with the United Nations Educational, Scientific and Cultural Organization (UNESCO) for the island to be included on the World Heritage List, create an opportunity to highlight, protect and conserve its natural heritage. This nomination stands out because the geology of Anticosti meets the criteria for Outstanding Universal Value, as it offers the best natural laboratory in the world for studying fossils and sedimentary strata from the first mass extinction of life that occurred at the end of the Ordovician period. The abundance, diversity, and state of preservation of the fossils are remarkable and allow world-leading research. The boundaries of the nominated property are clearly defined and include all the fossiliferous strata exposed along the seacoast and the Vauréal and Jupiter rivers. The stratigraphic and paleontological record within these boundaries contains all the attributes necessary for it to fully express its Outstanding Universal Value. Furthermore, the property and buffer zone are part of a network of publicly held protected areas managed by the Québec provincial government and so have strong long-term legislative protection.