Dendrochronology (or tree-ring dating) is the scientific method of dating tree rings (also called growth rings) to the exact year they were formed.

How do they date trees?

Crossdating is the most basic principle of dendrochronology. Crossdating is a technique that ensures each individual tree ring is assigned its exact year of formation. This is accomplished by matching patterns of wide and narrow rings between cores from the same tree, and between trees from different locations.

What is dendrochronology geography?

Introduction. Dendrochronology is the science that deals with the dating and study of the annual growth increments, or tree rings, in woody trees and shrubs.