Permian

/'pə:miən/
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Definition
  1. Proper noun:
    • The Permian period: A geological period that lasted from approximately 298.9 to 251.9 million years ago, notable for the diversification of early reptiles and ending with the largest mass extinction event in Earth's history.
Examples of Usage
  • Proper noun:
    • The Permian is the final period of the Paleozoic Era.
    • Fossils from the Permian show the rise of mammal-like reptiles.
    • The Permian-Triassic extinction event marked the end of the Permian.
Advanced Usage
  • "Permian Basin": A major sedimentary basin in the southwestern United States, known for its extensive petroleum and natural gas deposits.
    • The Permian Basin is a crucial region for oil production.
Variants and Related Words
  • Permian-Triassic (adj): Relating to the boundary between the Permian and Triassic periods.
    • Scientists study the Permian-Triassic boundary to understand the mass extinction.
Synonyms
  • The Permian Period: The formal geological term.
Related Phrases
  • "Late Permian": Referring to the latter part of the Permian period.
    • The climate became increasingly arid during the Late Permian.
  • "Permian extinction": A common term for the Permian-Triassic extinction event.
    • The Permian extinction wiped out nearly 90% of marine species.
Noun
  1. from 280 million to 230 million years ago; reptiles

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