Dendrochronology dating method

Karina (25)
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Vudogami

3/4/2019

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The science of constructing chronologies from tree rings is called dendrochronology. The basic concepts involved are not complex. Modern trees are known to produce one growth ring per year. This is a result of the annual cycle of seasons. The idea that ancient trees grew more than one ring per year will be discussed below.

Dendrochronology is a - to the year - exact method of dating wood. Tree growth only occurs in the outer layer between the bark and the actual trunk. In temperated zones of the world, trees only grow during the warm period of the year. During the summer the growth is relatively fast resulting in a light wood. In the autumn the growth is slower and gives a dark wood. If the summer weather is warm with a lot of rain we get a wide ring of new wood that year.

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By comparing the pattern of wide and narrow rings from a timber of unknown age with tree-ring chronologies from Northern Europe, the precise chronological position of the measured tree-ring series from the timber can be found. As the position of these chronologies is precisely dated by linking them with tree-ring data from living trees, an accurate date for the timber can be given. If bark or bark edge is preserved on the sample or object, the dating for the felling of the tree is accurately dated. As the tree-ring variation in the timber is a record of the climate affecting the tree in the region where the tree was growing, this information is also used by me to identify this region.

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Dendrochronology

Dendrochronology: dating a wooden object on the basis of the growth rings of a tree. This is one of the most accurate ways to date an ancient object. Dendrochronology "tree chronology" is essentially a simple method, and as children we all have done dendrochronological research. When a tree is felled, it is possible to count the growth rings, and because we know that a tree makes a new ring every year, we can establish in which year the tree was planted. But although a tree makes a new ring every year, not every annual ring is the same.

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