A concentric layer of wood, shell, or bone developed during an annual or other regular period of growth.
- Also known as tree-ring dating, the method is based on the fact that living trees add an annual growth ring to their trunk and branches.
- Its real record is written into the slowly changing landscape in which our daily life takes place; we can read this evolution in the built environment like a growth ring in a tree trunk.
- The bone, called an otolith, acquires a growth ring every day for at least the first six months of the fish's life.
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