Tree-ring dating on a Douglas-fir.

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Size: 4256px × 2832px
Photo credit: © JS Photo / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: 1200s, 13th, ages, american, americans, annual, bark, beginning, center, century, color, colour, concentric, cross, decade, dendrochronology, fire, growth, heartwood, high, horizontal, indians, layer, layers, light, middle, mt., national, native, park, patterns, photography, pith, rainier, ring, rings, section, softwood, tree, usa, wood, year