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    Tree ring dating database

    It’s important to remember that we have limited data, and new discoveries have often overturned previous ‘hard facts’.Recent research on seasonal effects on tree rings in other trees in the same genus, the plantation pine , has revealed that up to five rings per year can be produced and extra rings are often indistinguishable, even under the microscope, from annual rings.The database contains site numbers and site names, lab (LTRR) numbers, references where available, the outer date (AD), the outer symbol, and the confidence level.This confidential version of the database contains site locations; the public version (t DAR ID 399313) has site numbers (so locational information can be obtained from the proper authorities) but no locational data (to protect the archaeological sites).From the beginning of history, we have relied on trees of various types to meet our needs.Much can be learned about a species of tree and its environment by discovering its age, and researchers employ several methods to date trees.

    Dendrochronology or tree-ring dating is the scientific method of dating wood based on the analysis of patterns of tree-rings.Year: 2015 » Downloads & Basic Metadata This database contains 32863 tree ring dates from archaeological sites in new Mexico, Arizona, Colorado and Utah that Kohler was able to collect.All date determinations were made by the Laboratory for Tree Ring Research at the University of Arizona.In principle, dendrochronology can date the time at which tree rings were formed to the exact calendar year.It is used to date old buildings and other wood artifacts, to study past environmental conditions, and to calibrate radiocarbon dating.

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