In 1973, Part of the Flat Ground on Which a Subdivision

Multiple Choice

In 1973, part of the flat ground on which a subdivision was located became saturated and began to flow toward the Saint Lawrence River at speeds of up to 26 kmph (16 mph) . The ground that flowed consisted of silts and clays-not large, rocky regolith. What type of mass wasting event was this?

A) debris avalanche
B) soil creep
C) Earth flow
D) lahar