Dendrochronology dating definition
Dating of landslides is thus "based on changes in the amount and eccentricity of tree growth" (Alestalo, 1971: 72).
Dendrogeomorphology is a reliable means of determining the age of recent slope failures, where a single event such as the rotational failure of a slump block dominates the signal.
Some trees survive, although generally under poor growing conditions and tilted.
On the upper valley sides, slump blocks and the associated soil and vegetation commonly remain intact, despite the considerable displacement of bedrock.
Landslides generally result in tree mortality, especially along the lateral and terminal margins, and on the lower parts of landslides where the substrate tends to be severely disturbed.
The year of mortality can be determined by cross-dating of ring width signatures from the dead and living trees.
In western Canada, dendrochronology has been largely confined to the montane and boreal forests (Case and Mac Donald, 1995; Luckman and Innes, 1991).
Join Britannica's Publishing Partner Program and our community of experts to gain a global audience for your work!In seasonal climates, trees preserve a continuous record of annual events, in particular, climate.Dendrochronology, the study of the annual growth in trees, is the only method of paleoenvironmental research that produces proxy data of consistently annual resolution. Initially the cells are thin walled to conduct the abundant spring soil moisture.Whereas the use of these methods is limited by the relatively short life spans of most tree species, evidence of earlier floods and landslides should exist in dead wood.Reconstructing geophysical events from dead wood is more involved, however, since the logs are not in situ and cross-dating is required to determine the years of anomalous growth.