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🌍 Crawford Lake

Earth Sciences Canada North America

🌍 Crawford Lake
Global Boundary Stratotype Section and Point for the Anthropocene Epoch, Ontario, Canada


🕐 3 min read · Updated 10 Apr 2026 at 20:46
📌 Fast Facts
  • Location: Halton Region, Ontario, Canada, 40 km west of Toronto
  • Designation: Global Boundary Stratotype Section and Point (GSSP) for Anthropocene
  • Reference marker: Plutonium-239 and plutonium-240 isotopes from nuclear weapons testing
  • UNESCO inscription: 2023

Crawford Lake is a small meromictic lake in Ontario that has been formally designated as the geological reference ...

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