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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Creative#:
TOP15984925
Source:
達志影像
Authorization Type:
RM
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須由TPG 完整授權
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