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

question 76

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

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