Volcanoes, ice-cores and tree-rings: one story or two?

@article{Baillie2010VolcanoesIA,
  title={Volcanoes, ice-cores and tree-rings: one story or two?},
  author={Michael G. L. Baillie},
  journal={Antiquity},
  year={2010},
  volume={84},
  pages={202 - 215}
}
Good archaeology relies on ever more precise dates – obtainable, notably, from ice-cores and dendrochronology. These each provide year-by-year sequences, but they must be anchored at some point to real historical time, by a documented volcanic eruption, for example. But what if the dating methods don't agree? Here the author throws down the gauntlet to the ice-core researchers – their assigned dates are several years too old, probably due to the spurious addition of ‘uncertain’ layers. Leave… 
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