The dendroehronologist is concerned with the determination of dates of events and intervals of time by comparative studies of the sequence of growth-rings in trees and aged wood. Accuracy is obtained by cross comparison between trees and with established local, regional or areal chronologies. By these crossdating procedures exact dates can be assigned to tree-rings in trees, archaeological beams, charcoal remnants, and other materials where ring structure is discernible. The long-lived bristlecone pine furnishes datable chronologies extending back 4,500 years. By crossdating overlapping specimens an archaeological chronology has been established in Mesa Verde National Park to A.D. 420. The use of tree-rings to provide climatic and hydrologic indices has been limited to the indication of trends but it appears that it may be possible to provide more definitive predictions on the basis of studies now under way.
Document Type: Journal Article
Director of the Laboratory of Tree-Ring Research, University of Arizona, Tucson
Publication date: January 1, 1963
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