Undermines· strongYDIH-E019
Meltzer et al. 2014: 3 of 29 claimed boundary sites securely dated
- what the source states
- A site-by-site chronological audit of 29 localities claimed to contain the Younger Dryas boundary layer concluded that only 3 had radiocarbon control adequate to place their proxy horizon at ~12,800 cal BP; at the rest, the dating was too imprecise, too sparse, or stratigraphically disconnected from the sampled horizon to support an isochron.
- what we infer
- The synchroneity claim's foundation examined stone by stone: most of the "synchronous" sites turn out to be synchronous only if one assumes the conclusion when assigning the boundary. Apparent global simultaneity built from loose local chronologies is the specific failure mode the 2026 retractions later exhibited.
- limitations
- Kennett et al.'s 2015 Bayesian reanalysis answered with a formal synchrony model; the dispute over date selection and boundary assignment continues.