Rock glacier velocities, Selwyn Mountains, Yukon and NWT, Canada, Version 1

An average of 6 markers were surveyed on each of 15 rock glaciers, once each in 1983 and 1995 using a level (1983) and a theodolite (1995). Measurement error was on the order of 3 percent, however, the greatest variability in observed velocities is explained by the varying locations of the markers on the rock glaciers. Lichen ages were determined by Dyke (1990a), and rock glacier lengths were obtained from 1:50, 000 surficial geology maps used to compile the maps in Dyke (1990c-f). Please see the data documentation for further information.本数据集针对15处石冰川（rock glaciers），每处平均布设6个观测标记点，分别于1983年和1995年各完成一次测量：1983年使用水准仪（level）开展观测，1995年则采用经纬仪（theodolite）进行作业。本次测量的误差约为3%，但观测得到的流速最大差异，可归因于标记点在石冰川上的不同布设位置。地衣测年结果由戴克（Dyke）于1990a的研究中测定，石冰川长度数据取自1:50000比例尺的表层地质图，此类地图被用于编制戴克1990c-f系列论文中的相关制图。如需获取更多详细信息，请参阅本数据集的文档说明。