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Transverse section of olive tree trunk, cut down in 2013, several years after the tree had died. Sampling points marked on cross-section, color coded to pre-1955 (white); 1970–1979 (magenta); 2000–2009 (blue). Stars mark the presumed location of original piths. Note the bottom right nearly separate sub-section, which was found to be younger than the points A1, B1 and C1, and was therefore not considered in tree age calculation.
