Younger Dryas chronological sequence established. Older Dryas: 14,500-14,700 years ago, a brief cold period lasting decades to centuries Bölling-Alleröd interstadial: warming period following Older Dryas Younger Dryas: slightly less than 12,900 to 11,600 years ago

The Younger Dryas climate episode: Older Dryas (14,500-14,700 years ago, brief cold snap), followed by the Bölling-Alleröd warming, then Younger Dryas (12,900 to 11,700 years ago). It ended 11,700 years ago, marking the start of our current Holocene epoch.

Key facts:

- Older Dryas: 14,500-14,700 years ago, a brief cold period lasting decades to centuries

- Bölling-Alleröd interstadial: warming period following Older Dryas

- Younger Dryas: 12,900 to 11,700 years ago

- The Younger Dryas ended 11,700 years ago, marking the beginning of the Holocene

- The term Younger Dryas was introduced by Hart(s) in 1912 at the German Geological Society

Key Facts

  • Older Dryas: 14,500-14,700 years ago, a brief cold period lasting decades to centuries
  • Bölling-Alleröd interstadial: warming period following Older Dryas
  • Younger Dryas: slightly less than 12,900 to 11,600 years ago
  • The Younger Dryas ended 11,600 years ago, marking the beginning of the Holocene
  • The term Younger Dryas was introduced by Harts in 1912 at the German Geological Society

Source: Speak To The Earth and It Shall Teach Thee: Younger Dryas Series S1E4 by The Randall Carlson