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Tree ring width measurements from a site on Massenhutten Mountain in Virginia, United States. The chronology covers 339 years, from 308 to -31 calendar years before present. Data is archived by NOAA's National Centers for Environmental Information as part of its Paleoclimatology World Data Service.
Time notation uses 'calendar years before present (BP)', where present is defined as 1950 AD; negative values indicate years after 1950 AD. Users must cite the original study per archive requirements.