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Tree rings dating to the mid-1500s from a ponderosa pine log

By Fort Collins Science Center 2016 (approx.)
Tree rings dating to the mid-1500s from a ponderosa pine log collected near Taos, NM.
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Detailed Description

Tree rings dating to the mid-1500s from a ponderosa pine log collected near Taos, NM.

Sources/Usage

Public Domain.