Landslides | Idaho Geological Survey
In Idaho, examples include basalt with sedimentary interbeds, altered volcanic rocks, fractured metamorphic rocks, glacial and lake deposits, and weathered granite. ... The connection between flooding and landslides is illustrated by the events in the Boise foothills between 1959 and 1997. On August 19, 1959, a cloudburst in the Boise foothills ...