Dating living trees

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Comments 1

Gogal

2/4/2019

Bravo, what excellent message

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Dating the ancient Minoan eruption of Thera using tree rings

Over the last few decades, archaeology has come into its own as a scientific endeavor. Gone are the romantic images of gentlemen in pith helmets carting off treasures to the museums and estates of Europe. Gone, too, is the idea that archaeologists are always on the side of the Bible believer. Modern interpretations frequently challenge biblical accounts. Further, dates generated by new techniques are often at odds with the timing of events given by Scripture. The purpose of this first article is to discuss problems with radiocarbon and tree-ring dating or dendrochronology , which are the two most common direct dating techniques in archaeology.

The annual growth rings of long-lived trees, such as sequoias, bristlecone pines, and European oaks, whose wood was used for beams, posts, and other purposes can be used to date sites. Seasonal conditions affect annual tree growth, causing all trees of the same species within a given geographical region to have the same tree-ring pattern. Cross sections of cut or dead trees from a single region are compared and the tree-ring patterns are matched. Originally used on southwestern pueblos, tree-ring dating uses sequences of growth rings to determine the date when the tree was first cut down. The use of this dating method has expanded to other regions and time periods. Historic houses may be dated through dendrochronology of wooden beams.

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Carbon dating techniques were first developed by the American chemist, Willard F. It is produced currently at a fairly constant rate in the upper atmosphere through the action of cosmic radiation on Nitrogen When they die, they no longer obtain more 14 C to incorporate, and so, the 14 C decays back into 14 N without being replaced. A ratio can then be established and compared with the known half-life of 14 C. Then an age can be obtained for the organic material.

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Radiocarbon dating living tree

To determine the absolute age of wood and organic artifacts. Method A scientific date is either absolute specific to one point in time or relative younger or older than something else. Dendrochronology, or tree-ring dating, provides absolute dates in two different ways: directly, and by calibrating radiocarbon results.

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