I wondered about this. The paper shows some pics and illustrations of high cliffs, but the giant boulder (#293) is down at the cliff base.
The two largest blocks (Supplementary Table 1, boulder numbers 267 and 293, each weighing several hundred tonnes) are located close to sea level. At greater elevations, the clasts that moved are smaller—but “smaller” is a relative term: boulders up to 20 t mass were transported at 20 m AHW. The highest elevation at which we recorded displacement is 26 m AHW (at 18 m inland, maximum clast size 1.2 t: Location 24 in Supplementary Table 1), and the farthest distance inland is 222 m (at 20 m AHW, maximum clast size 28. 5 t, Location 54).
