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Mass movements and tree rings: A guide to dendrogeomorphic field sampling and dating
Presented by Prof. Markus STOFFEL on 15 May 2013 from 18:00 to 21:00
Type: Poster Presentation
Session: Poster Session + Reception
Board #: 62
Trees affected by mass movements record the evidence of geomorphic disturbance in their growth-ring series, thereby providing a precise geochronological tool for the reconstruction of past process activity. Identification of activity was typically based on the presence of growth anomalies in affected trees and focused on the presence of scars, tilted or buried trunks as well as on apex decapitation. For the analyses and interpretation of disturbances in tree-ring records, in contrast, clear guidelines have been missing so far and largely differing or no thresholds have been used to distinguish signal from noise. We examine interpretive issues relating to the interpretation and dendrogeomorphic dating of mass movements. Particular attention is drawn to sampling in terms of sample distribution across a study site, the actual selection of trees as well as to sample depth. This contribution wants to set standards for dendrogeomorphic fieldwork, analysis and interpretation and for different mass-movement processes.