What is tree ring cross dating

05 Oct

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COFECHA is a computer program that assesses the quality of crossdating and measurement accuracy of tree-ring series. Holmes in 1982, the program has evolved into one of the most important and widely used in dendrochronology.

Each field team should obtain the appropriate field supplies from their instructor and obtain 3 increment cores from white oak trees at the chosen field site.

Please consult Field Methods for a detailed description of the field equipment, including its use and care, and the actual methods of core collection and preservation. The cores should next be mounted and glued in to increment core holders and then the surface prepared for study following the protocols outlined in Lab Methods.

The skeleton plot is the tool used to discover these "signal years" and subsequently cross-validate each core for exact dates.

Skeleton plotting is a bit of an acquired skill, and there is certainly some art to it.