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Monthly Archives: January 2014

Flagstaff’s Tree-Ring Study Pioneers (access required)

Flagstaff’s Tree-Ring Study Pioneers <span class="dmcss_key_icon"><img alt="(access required)" src="/files/2013/12/lock1.png" border=0/></span>

Within the small scientific circle in Flagstaff in the 1920s were three men who combined their expertise to develop the science known today as dendrochronology, or tree-ring dating: astronomer Dr. Andrew E. Douglass (1867-1962); forester Gustaf A. Pearson (1880 -1949) and zoologist Dr. Harold S. Colton (1889-1970). Each man would become well-known and respected for this project and other scientific achievements in northern Arizona during their tenures.

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