Age nodes for fission tracks from Ellesmere Island and Northwest Greenland

Calculated age nodes based on fission track data from the Canadian Shield (Spiegel et al., 2023b;2023b) is given in Table S1. The deconvolved fission track length histograms are shown in Fig. S1-S25.基于加拿大地盾（Canadian Shield）的裂变径迹（fission track）数据计算得到的年龄节点（Spiegel等人，2023b；2023b）已列于表S1。经反褶积处理的裂变径迹长度直方图见图S1~S25。