Section through the trunk of a red pine tree (Pinus resinosa). This shows marked growth rings. Visible rings appear as a result of the changing growth

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Section through the trunk of a red pine tree (Pinus resinosa). This shows marked growth rings. Visible rings appear as a result of the changing growth rate through the seasons, so each ring equates to one year of growth. The use of patterns of growth rings as an aid to dating a sample is called dendrochronology.

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Size: 4500px × 4500px
Photo credit: © Science Photo Library / Alamy / Afripics
License: Licensed
Model Released: No

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