Abstract The rock glaciers of the Swiss National Park were the first in the world where in-situ measurements of surface displacement were undertaken. starting with the pioneering work of Chaix in 1918. Our research is focused on the four rock glaciers described by Chaix. bridging the historical data gap that existed between their early 20th-century measurements and the most recent obs... https://www.chiggate.com/merlot-redbud-tree-sale/