Photo of Ponderosa Pine illustrating years of diminished growth due to Pandora Moth defoliation (white arrow and bracket). Speer, Indiana State University, provided by Henri D.Grissino-Mayer, The University of Tennessee, Knoxville, Go to the University of Arizona Laboratory of Tree Ring Research website to help complete the Tree Ring Concept Map Worksheet.Most of the images here were scanned using the original wood samples.The captions beside the pictures contain terminology used by dendrochronologists when referring to tree-ring characteristics.
A native of New England, Walter Boynton began his science career as a summertime assistant at the Chesapeake Biological Laboratory in Solomons, Maryland.
I also supply several links to other very useful pages concerning tree-ring dating from where educators can obtain additional background informations.
Constructed by Lori Martinez, Laboratory of Tree-Ring Research, The University of Arizona, Tucson, AZ 85721.
Help your little nature lover learn about tree-ring dating with this helpful guide.
He'll also learn a bit about a tree's inner layers, and then he can take a quick quiz when he's done.