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Instructional Crossdating Exercises


These exercises will benefit students, educators, and experiences dendrochronologists alike. They are intended as crossdating practice, and will help familiarize you with the concepts (see basics page) and techniques (see online skeleton plotting exercise) you have already read about. The only way you can truly become proficient at crossdating is to actually crossdate real wood.

Download and Print

You will need...

general instructions for all exercises (HTML)
Crossdating Cheat Sheet
explanation of wood-marking conventions
web GIF (22KB) or PDF (40KB)
Graph Paper
printable paper: UNR site (non-LTRR)
free Acrobat® Reader®

free Acrobat (R) Reader (R) software is required to view and print some of these documents

please send comments and suggestions to
Rex Adams (


Methuselah Walk Bristlecone Pine
crossdate the oldest trees in the world
exercise (PDF, 416KB)
Pine Tree House
crossdate archaeological ruins
exercise (PDF, 393KB)

Extra Materials

Wood Reference
chart for species identification of common southwestern wood samples
web GIF (20KB) or PDF (46KB)
Blank Data Sheet
PDF (32KB)

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Laboratory of Tree-Ring Research
© Arizona Board of Regents
The University of Arizona
Main Office: 105 West Stadium
Tucson, AZ 85721 USA
phone 520-621-1608; fax 520-621-8229
updated: 25 January, 2005