•Assumed mechanism – sliding of bedding on lower slope which undermines toppling/rotation of upper peak
•This is different than original assumptions and continues to be refined based on modern studies
Since the initial studies by
Allan there has been the assumption in the geotechnical community that the
landslide would originate on bedding along the eastern limb of the anticline
and a failure surface would propagate upslope and through the western side of
the mountain peak.Recently we have
re-evaluated this assumption and consider that the lower slope and upper peak
(~ 0.3 million m3) are likely moving independently and the peak may be either
sliding or rotating in response to the lower slope movements along bedding.
