Landslide – Gros Ventre Slide, WY. Which is not a possible reason that might have contributed to the development of the slide? Choose one: River erosion may have made the slope unstable. Heavy rains may have made the materials heavier and lubricated the slip surface. Rock layers were dipping toward the valley, parallel to the slip surface. A large housing development was built in the area, making the slope unstable.

All options are possible reasons for causing a landslide.

Explanation:

Landslide is a geological phenomenon that occurs when the soil is moved due to the occurrence of external factors, causing sediments and even rocks to become unstable and slide downwards. This phenomenon is very dangerous, as it can bring down houses, buildings and any other structure causing burial.

A landslide can happen for several reasons, among which can be cited:

A large housing development was built in the area, making the slope unstable.

Explanation:

The Gros Ventre Slide landslide of June 23, 1925, was one of the largest fast-moving landslides in generations and it occurred near the village of Kelly, Wyoming.

In just three minutes, huge amounts of rock and debris cascaded down the north slope of Sheep Mountain.

The first 3 options listed in the question were listed as official factors contributing to the Landslide.

Heavy rains may have indeed made the materials heavier.

River erosion as well may have indeed made the slope unstable.

And Rock layers were dipping toward the valley, parallel to the slip surface.

There is NO evidence that a large housing development being built in the area made the slope unstable.

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