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It turns out that trees that are tilted by landsliding record eccentric elliptical tree rings.The downslope parts of the rings grow wider than the upslope ones, and in studies carried out in Poland, Malgorzata Wistuba and colleagues found that those tilts are in evidence between three and fifteen years prior to catastrophic collapse.Fortunately for us, the looters left behind the tools they used to break into the mounds, wooden spades and stretchers (small handled platforms used to carry objects out of the tombs), which were analyzed using dendrochronology.Tying tree ring fragments in the tools to established chronologies, Bill and Daly (2012) discovered that all three of the mounds were opened and the grave goods damaged during the 10th century, likely as part of Harald Bluetooth's campaign to convert Scandinavians to Christianity.
The tropic and subtropic regions of the world, such as the Brazilian Atlantic Forest of South America, store about 54% of the total biomass of the planet.
Wang and Zhao used dendrochronology to look at the dates of one of the Silk Road routes used during the Qin-Han period called the Qinghai Route.
To resolve conflicting evidence over when the route was abandoned, Wang and Zhao looked at wood remains from tombs along the route.
ic leaders in peace which allowed Jews, Muslims and Catholics to live together harmoniously.
He helped the Islamic Empire expand throughout Europe.