"Parent Log" of The Boat's Hull
The hull of Hasholme Logboat was made of an oak (Quercus sp.). After all the measurements of the hull were taken, it was estimated that the parent log (oak log the boat was made of) had to be approximately 14 m (46 ft) long with at least 5.4 m (18 ft) circumference. Thus the theoretical weight of this log must have been around 28.5 tons but because of the presence of “heart rot” (natural process of rotting of the interior of the log) these estimates are exaggerated. Based on the size of the oak and other dendro measurements, it was also suggested that this kind of tree was between 810 and 880 years old on felling. Oaks of such advanced age and size must have developed a rot known as “brittle heart,” which originates at the bottom and spreads upward. In the case of Hasholme, this rot spread almost to the very top of the trunk. This meant that even though the hollowing was much easier, the openings on both ends had to be closed and watertight. It was not an accident to select a tree with an extensive rot along its entire length and thus save tremendous amount of time.
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