The Younger Dryas cold period began in less than 100 years and lasted roughly 1,300 years, occurring approximately 12,900 to 11,600 years ago.
Notes on verification
Multiple independent scientific sources (ScienceDirect, Science.org, PNAS, EBSCO) corroborate the duration and timeframe. Minor variation exists in exact endpoint dates (11,600 vs 11,700 BP) across literature, but core claim is well-supported. [tier=gold indep_score=0.983 clusters=3 claim_tier=notable]
Sources
- Younger Dryas | Definition, Causes, & Termination (seed:history_and_archaeology)
- https://www.ebsco.com/research-starters/earth-and-atmospheric-sciences/younger-dryas (corroboration)
- https://www.sciencedirect.com/science/article/abs/pii/S1040618211001480 (corroboration)
- https://www.science.org/doi/abs/10.1126/science.1160148 (corroboration)