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Log coffins have been discovered in caves and rockshelters in the Pang Ma Pha district, Mae Hong  Son  province,  Northwestern  Thailand.  Most  are  made  of  teak  wood.  Many  researchers have used the 14C method to determine their age. However, 14C cannot provide as precise a ca-lendar age as dendrochronology. In this paper, we therefore applied dendrochronology analysis to a number of teak log coffins at the Ban Rai Rockshelter to establish a floating chronology and to cross-date the coffins relative to each other. Then, wiggle matching was used for one log cof-fin  to  derive  an  approximate  but  absolute  calendar  age.  The  findings  indicated  that  cutting  of this teak  tree  occurred  around  AD  265.  The  analyses  also  revealed  a  close  association  between coffins of the same head style.

Teak Log Coffins in Northwest Thailand: Dated by Dendrochronology and 14Cwiggle Matching