Pattern Matching the Skeleton Plot and Date Chronology

By sliding the skeleton plot left and right relative to the master, the mirror image of the pattern of marks was found.   Even the "b" mark for ring #17 of the sample matches that for the year 1933 of the master.   When you see a match, you can then determine the start and end years of the sample.   For this sample, the start year for ring #0 of 1916 and an end year for ring #30 of 1946.

 

To match patterns on the applet, show the master chronology and switch the graphs to an appropriate size for your computer monitor.   Then, move the master chronology left or right by clicking and holding the left mouse button in the time series portion of the chronology graph and moving the mouse.   The goal is to find where the marks on the skeleton plot match those of the master in mirror image.