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 | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library |
Bildgröße: | 3733 px × 5600 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |