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Glossary of Dendrochronology

skeleton plot

A skeleton plot of historical significance: on June 12, 1929, A.E. Douglass and his colleagues Hargrave and Hauri extended their Oraibi absolute chronology back to 1237, by crossdating it with a charred beam (sample number HH39) from the Sholow settlement in Northern Arizona. They bridged the gap with their formerly floating chronology (RD), which was extended by 350 years. This finding enabled 27 famous prehistoric cliff-dwelling settlements of the American Southwest to be absolutely dated. (Douglass 1935)