Abstract
Scars from past landslides on Pillar Mountain above the harbor of Kodiak, Alaska, serve as reminders of the past—a past that could herald the future, according to a recent U.S. Geological Survey report. Reuben Kachadoorian and Willard H. Slater cite several factors as being indicative of landslide movement in the area. These include widening cracks seen from aerial and field observations, subsurface movement noted in two observation holes, and surface movement showing a range of downslope movement from 1.3 to 165 mm between 1972 and 1976. There is also geologic evidence, they add, that ‘the current earth movement on the Pillar Mountain landslide appears to be part of an ancient landslide on the mountain that has been reactivated.’
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