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Ochoan Stage
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Ochoan Stage

geology
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The Ochoan Stage is not a recognized geological stage. The term "Ochoan" is sometimes used informally to refer to the latest part of the Permian Period, which ended approximately 252.2 million years ago. This period marked the end of the Paleozoic Era and was characterized by a significant warming trend and the assembly of the supercontinent Pangea. The Permian Period concluded with the largest mass extinction event in Earth's history, drastically reducing the diversity of life.12

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3 Britannica Sources
  1. Permian Period
  2. Triassic Period - Invertebrates
  3. Chattian Stage

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