Dendrochronology:

Timeline chronology: Date tree objects according to tree annuals. This is one of the most accurate ways to date ancient objects.

The chronology of trees ("tree chronology") is basically an easy way, and has been doing chronology research on trees since childhood. When you cut down trees, you can calculate the rings, we can decide the year the trees are planted, as we know that the trees make a new wheel every year.

However, trees make new circles every year, but not all rings are the same. During the rainy season and warm years, the trees grow well, little year is cold and dry. Therefore, when the annual ring is thin, it indicates a cold year, and when the annual ring is thick, I prove that the year is warm. Since summer and winter will never be exactly the same for several years, the wooden ring shows an irregular pattern. Thick rings and thin rings alternate with each other without a special system.

This irregular pattern is represented by a time-series curve like a tree. You can plot the thickness of the ring along the vertical axis and draw the year along the horizontal axis. Now you can count back for a long time

In the picture above, I saw three trees. The first tree was harvested in 2000 and it is possible to count until 1870. The second piece of trees was taken from the pillar in the house built in the early 20th century. There was an overlap between 1870 and 1910: both trees had the same thick annual ring pattern. The third part of our series is almost the same, but it can be found in the windmill built in 1820

The trick is to find the old tree and fit it to the range of the existing ring. In some areas (eg California or Northwest Europe) it can range from several years to several thousand years. Using such series, archeologists who find parts of trees can simply dating it by matching the rings with known curves.

Accuracy depends on three factors. Firstly, timber which must be obsolete must have at least 40 rings. Secondly, that circle can only be compared with a tree-like aged curve from the same climatic region. Finally, if the boundary between timber and heartwood still exists, the time to cut trees may be precisely outdated; otherwise it will find the post post (which is also important) . Oak and ash trees are better than other trees

In the world of the Aegean Sea, there is a series of rings dating back to the year 363 AD. There is another series (1503 years in length) not suitable for this series. There is a gap of centuries. However, by using radiocarbon dating, American tree chronologists were able to compare this series from 2220 BCE to 718 BC.

This method was originally developed by the American scientist A. E. Douglas in the early 20 th century. He used it to build in Arizona and New Mexico villages before Colombia.

The annual ring model due to climate was developed by A. E. Douglass in the rheology of the University of Arizona at the beginning of the 20th century (now a wide range of annual rings laboratory). Tree chronology is the most effective way to analyze past climate patterns and to identify the age of timber, such as the age of timber used in prehistoric human architecture. An interesting tree pattern called Reaction Tree leads to an inclined tree (tree) because (tree) attempts to straighten the trunk by creating more trees on the side of the tree. Coniferous trees tend to straighten the trunk by gradually increasing the width of the annulus to the underside of the slanted trunk and making it vertical. Therefore it is named compressed wood. In contrast, the trees of angiosperm (hardwood) are called tension woods because the aged rings become wider on the upper side of the lean meat and the trees become visible straight.

The chronology of trees ("tree chronology") is basically an easy way, and has been doing chronology research on trees since childhood. You can calculate the annual ring by cutting a tree, and you can determine the year the tree is planted, as you know that the tree makes a new wheel every year. However, trees make new circles every year, but not all rings are the same. During the rainy season and warm years, the trees grow well, little year is cold and dry. Therefore, when the annual ring is thin, it indicates a cold year, and when the annual ring is thick, I prove that the year is warm. Since summer and winter will never be exactly the same for several years, the wooden ring shows an irregular pattern. Thick rings and thin rings alternate with each other without a special system.