World Heritage Identification Number: 1686
World Heritage since: 2023
Category: Natural Heritage
WHE Type: Natural Landscapes & Geographic Features
Transboundary Heritage: No
Endangered Heritage: No
Country: 🇨🇦 Canada
Continent: Americas
UNESCO World Region: Europe and North America
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Anticosti Island: A Palaeontological Treasure Trove
Anticosti Island, located in the Gulf of St. Lawrence, off the coast of Quebec, Canada, is a unique and significant geological site that offers a remarkable glimpse into Earth's ancient past. Inscribed as a UNESCO World Heritage Site in 2023, Anticosti stands out as the most complete and best-preserved palaeontological record of the first mass extinction of animal life, which occurred approximately 447-437 million years ago.
More to come…UNESCO Description of the World Heritage Site
Situated on the island of Anticosti, the largest island in Quebec, this property is the most complete and best preserved palaeontological record of the first mass extinction of animal life, 447-437 million years ago. It contains the best preserved fossil record of marine life covering 10 million years of Earth history. The abundance, diversity, and exquisite preservation of the fossils are exceptional and allow for world-class scientific work. Thousands of large bedding surfaces allow the observation and study of shell and sometimes soft-bodied animals that lived on the shallow sea floor of an ancient tropical sea.UNESCO Justification of the World Heritage Site
Criterion (viii): Anticosti is the best natural laboratory in the world for the study of fossils and sedimentary strata from the first mass extinction of life, at the end of the Ordovician period, which represents an important milestone in the history of Earth. It contains the largest stratigraphic record in thickness and the most complete, and best-preserved fossil record of marine life covering 10 million years of Earth history, from the Upper Ordovician to the Lower Silurian, 447-437 million years ago. The abundance, diversity, and state of conservation of the fossils are exceptional and allow for world-class scientific work. Thousands of large bedding surfaces allow the observation and study of shell and sometimes soft-bodied animals that lived on the shallow sea floor of an ancient tropical sea. These animals were buried by the continual passage of strong storms, which completely preserved the organisms and the ecological structure of the ancient marine communities. The exquisite preservation of the fossil shells allows the analysis of their geochemical composition to identify ancient climatic and oceanographic signals, and to study in depth the causes of the mass extinction of life at the end of the Ordovician period.
Encyclopedia Record: Anticosti Island
Anticosti Island is a large but sparsely populated island belonging to the Canadian province of Quebec. It lies in the Gulf of St. Lawrence, and is separated from mainland Quebec by the Jacques Cartier and Honguedo straits. Administratively, it forms a municipality of the Côte-Nord region.Additional Site Details
Area: 18,240 hectares
Number of Components: 1
Coordinates: 49.5386111111 , -63.2452777778
IUCN World Heritage Outlook
The 2025 Conservation Outlook on Anticosti reports the following assessment:
Source: International Union for Conservation of Nature (IUCN) · View assessment
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NASA, Public domain
World Heritage Research
Discover scientific research and academic studies that deepen our understanding of Anticosti from its history and significance to its conservation, management, and contemporary challenges.
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Phylogenetic position and stratigraphic uncertainty of a new flexible crinoid from the Ordovician–Silurian boundary of Anticosti Island (Québec, Canada)
Researchers have identified a new flexible crinoid species, Anticosticrinus natiscotecensis, from the Ordovician–Silurian boundary of Anticosti Island (Québec, Canada), a region critical for studying the Late Ordovician mass extinction (LOME). Phylogenetic analysis places this species within the family Anisocrinidae, contributing to understanding crinoid faunal turnover during this pivotal period. The study also employed Bayesian methods to quantify stratigraphic age uncertainty, suggesting a late Hirnantian age, though not definitively resolving it. This discovery provides valuable data for evaluating extinction timing and diversification patterns in flexible crinoids, which became dominant in the Silurian.
Cole, S. R., Wright, D. F., & Hopkins, M. J. (2025). Phylogenetic position and stratigraphic uncertainty of a new flexible crinoid from the Ordovician–Silurian boundary of Anticosti Island (Québec, Canada). Journal of Paleontology, 99(2), 358–368. https://doi.org/10.1017/jpa.2025.10110
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Hirnantian (Late Ordovician) chemostratigraphy of Anticosti Island, eastern Canada: Comparison of stable carbon and oxygen isotope compositions from brachiopod shells and bulk carbonate
Brachiopod shells from Anticosti Island's Ellis Bay Formation preserve pristine stable carbon (C) and oxygen (O) isotope signatures, offering a more sensitive and faithful archive of ancient seawater composition than bulk carbonate. Intra-shell isotopic variations reveal consistent trends across ten species, with δ13C increasing by ~0.5–1‰ from early to late growth stages, indicating minimal diagenetic alteration. Inter-species comparisons show small differences in average δ13C and δ18O at given stratigraphic levels, supporting their comparability for chemostratigraphy. Notably, brachiopod shells exhibit significantly higher δ13C than bulk micrite during the peak Hirnantian Isotopic Carbon Excursion (HICE), reinforcing their utility as reliable proxies for paleoenvironmental reconstruction, particularly during the Hirnantian glaciation event.
Schwarz, D. M., Longstaffe, F. J., Jin, J., & Desrochers, A. (2026). Hirnantian (Late Ordovician) chemostratigraphy of Anticosti Island, eastern Canada: Comparison of stable carbon and oxygen isotope compositions from brachiopod shells and bulk carbonate. Palaeogeography, Palaeoclimatology, Palaeoecology, 681, 113382. https://doi.org/10.1016/j.palaeo.2025.113382
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Anticosti: Tourism, Industry, and Nature Construction on a Nordic, Peripheral Island
Anticosti Island's recognition as a UNESCO World Heritage Site in 2023 highlights the exceptional universal value of its nature and culture, particularly its nordicity and peripherality. This study reveals how these characteristics were reimagined by the tourism industry from locational impediments to attractions, making nature tourism an economic mainstay. The research draws on regional tourism histories to show that this transformation was achieved through a cultural construction process that complemented industry and urbanity. By analyzing Anticosti's unique position in the northern Gulf of St. Lawrence, the study provides insights into how peripheral locations can be leveraged for sustainable development.
Hatvany, M., & Bolger, L.-L. (2025). Anticosti: Tourism, Industry, and Nature Construction on a Nordic, Peripheral Island. Acadiensis, 54(1), 34–71. https://doi.org/10.63489/acad.2025.35751
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Late Ordovician cornulitids from Anticosti Island, eastern Canada, and their evolutionary implications
Researchers have identified two new species of Late Ordovician cornulitids, Cornulites richmondensis and Cornulites hemistriatus, from Anticosti Island, Canada. These free-living organisms exhibit unique morphological traits, such as a thick, punctate, cross-bladed lamellar conch wall and septate juvenile parts, bridging the evolutionary gap between Cornulites and later Silurian-Devonian Tentaculites. The study suggests that these cornulitids share similarities with brachiopods in their shell microstructure but possess finer, less distinct lamellar layers. This discovery provides new insights into the evolutionary transition of these fossil groups during the Late Ordovician period.
Jin, J., & Vinn, O. (2025). Late Ordovician cornulitids from Anticosti Island, eastern Canada, and their evolutionary implications. Journal of Paleontology, 99(6), 1268–1284. https://doi.org/10.1017/jpa.2026.10214
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A high-resolution sequence stratigraphic framework for the eastern Ellis Bay Formation, Canada: A record of Hirnantian sea-level change
A high-resolution sequence stratigraphic framework for the eastern Ellis Bay Formation on Anticosti Island, Canada, reveals six fourth-order depositional sequences bounded by subtle, regionally traceable unconformities. These sequences, marked by quartz pebble lags and depleted carbon isotopic values, provide a detailed record of Hirnantian sea-level changes during the Late Ordovician mass extinction. The framework enables the integration of paleobiological, stratigraphic, and geochemical data into a basin-wide perspective, suggesting that other coeval sections may be incomplete at the level of these fourth-order cycles.
Zimmt, J. B., Holland, S. M., Desrochers, A., Jones, D. S., & Finnegan, S. (2024). A high-resolution sequence stratigraphic framework for the eastern Ellis Bay Formation, Canada: A record of Hirnantian sea-level change. Geological Society of America Bulletin, 136(9-10), 3825–3849. https://doi.org/10.1130/b37190.1
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Bridging the gap between Quebec and Newfoundland: new insights on the protracted and diachronic history of the Anticosti foreland basin
A new study reveals significant stratigraphic and tectonic variability along the Anticosti foreland basin, bridging Quebec and Newfoundland. The research identifies a thick post-Llandovery sedimentary succession (∼2 km) in two regional synclines, with youngest sediments correlating to the Upper Gaspé Sandstone Group–Red Island Road Formation (Emsian–Eifelian). Post-Eifelian deformation is characterized by folds ranging from 2–10 km in wavelength, with newly recognized northwest-striking faults exhibiting syn- to post-Middle Mississippian movements. The southern boundary of the basin is linked to an unconformity or poorly documented east-southeast to northeast-striking faults. Magnetic and seismic data were used to map rock units, distinguishing igneous dykes from sedimentary markers by their higher amplitude and geometry. This study enhances our understanding of the basin's complex history.
Pinet, N. (2025). Bridging the gap between Quebec and Newfoundland: new insights on the protracted and diachronic history of the Anticosti foreland basin. Canadian Journal of Earth Sciences, 62(1), 66–92. https://doi.org/10.1139/cjes-2024-0072
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Chitinozoan biostratigraphy through the Aeronian–Telychian boundary interval on Anticosti Island, Canada
Researchers have refined the position of the Aeronian–Telychian boundary on Anticosti Island, Canada, using chitinozoan biostratigraphy. This study identifies two key biozones—the Ancyrochitina ramosaspina and Eisenackitina dolioliformis—which correlate with global standards, clarifying the timing of this critical interval in Earth's history. The findings also define three new chitinozoan species, providing precise markers for further geological studies. By integrating these data with existing conodont, graptolite, and brachiopod records, the study confirms limited unconformities at the boundary, contrasting with less complete coeval locations like the Baltic succession. This refined age model offers a solid foundation for investigating Llandovery biogeochemical events following the Late Ordovician mass extinction.
Klock, C., Desrochers, A., McLaughlin, P. I., Emsbo, P., De Backer, T., Jonckheere, F. M., Esteves, C. J. P., & Vandenbroucke, T. R. A. (2024). Chitinozoan biostratigraphy through the Aeronian–Telychian boundary interval on Anticosti Island, Canada. Journal of Micropalaeontology, 43(2), 475–495. https://doi.org/10.5194/jm-43-475-2024
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