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A landslide in which the sliding surface is located within the soil mantle or weathered bedrock (typically to a depth from few decimeters to some meters) is called a shallow landslide. Debris slides and debris flows are usually shallow. Shallow landslides can often happen in areas that have slopes with high permeable soils on top of low ...
The difference between these two concepts is subtle but important. The landslide causes are the reasons that a landslide occurred in that location and at that time and may be considered to be factors that made the slope vulnerable to failure, that predispose the slope to becoming unstable. The trigger is the single event that finally initiated ...
Sudden slumps usually occur after earthquakes or heavy continuing rains, and can stabilize within a few hours. Most slumps develop over comparatively longer periods, taking months or years to reach stability. An example of a slow-moving slump is the Swift Creek Landslide, a deep-seated rotational slump located on Sumas Mountain, Washington.
Costliest landslide in United States history; damage estimated at $200–400 million (1983 dollars). Landslide formed lake over 160 feet (49 m) deep before draining. [115] 5 Oct 1985 Portugués Urbano district, Ponce, Puerto Rico: Mameyes landslide: 129 120 houses destroyed, greatest death toll in North American history from a single landslide ...
Landslides occur around the world and have helped shape the Earth as we know it. The landslide that destroyed a rural neighborhood and claimed 43 lives in Oso, northeast of Seattle, 10 years ago ...
A rockslide is a type of landslide caused by rock failure in which part of the bedding plane of failure passes through compacted rock and material collapses en masse and not in individual blocks. Note that a rockslide is similar to an avalanche because they are both slides of debris that can bury a piece of land.
A landslide, also called a landslip, [10] is a relatively rapid movement of a large mass of earth and rocks down a hill or a mountainside. Landslides can be further classified by the importance of water in the mass wasting process. In a narrow sense, landslides are rapid movement of large amounts of relatively dry debris down moderate to steep ...
New drilling in Rancho Palos Verdes has revealed that devastating land movement has been caused, at least partially, by a deeper slip plane — meaning a larger area could be affected.