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We first determine their chronological growth deposition using high resolution radiocarbon dating.
Table 1 presents the dating results of this section.
Cambial growth in the respective vascular region in the stem will also cease, while the rest of the tree can continue to live normally.
A similar phenomenon, where regions on the circumference of the tree’s cross-section may die while others continue to grow have been reported for a number of coniferous species growing under adverse conditions, and as they grow in close proximity, the friction at their interface can cause bark breakage.
In both cases we show that radiocarbon dates of the last formed wood along the circumference are not chronologically homogenous, and can differ by up to a few decades.
Thus the outermost wood layer does not necessarily represent the date of the last year of growth.