Fig. 3

(a–d) Show histograms of the area and number of RSL with respect to slopes in Palikir crater MY 34 (a) and MY 33 (b) and Raga crater MY 34 (c) and MY 33 (d). (e–h) show rose maps of the number ratio and coverage area of RSL with respect to aspect in Palikir crater MY 34 (e) and MY 33 (f) and Raga crater MY 34 (g) and MY 33 (h). The outer axis represents the aspect distribution, with 0° indicating a north-facing slope. The length of the bar on the number ratio axis indicates the percentage of RSL in a specific direction relative to all RSL.