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Influential narrower definitions restrict landslides to slumps and translational slides in rock and regolith, not involving fluidisation. This excludes falls, topples, lateral spreads, and mass flows from the definition. [1] [2] The causes of landslides are usually related to instabilities in slopes.
Deep-seated landslides are those in which the sliding surface is mostly deeply located, for instance well below the maximum rooting depth of trees. They usually involve deep regolith, weathered rock, and/or bedrock and include large slope failures associated with translational, rotational, or complex movements. [39]
The term landslide refers to a variety of mass wasting events (geologic slope failures) that include slumps, slides, falls, and flows.The two major types of slides are rotational slides and translational slides. [3]
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.
In the wake of Hurricane Helene, more than 2,000 landslides displaced families in western North Carolina. They are waiting to find out if rebuilding is even possible or safe.
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 ...
"Landslide movement continues to manifest at the ground surface in the form of scarps, fissures, grabens/sinkholes, tensional cracking, shear zones and thrust features," the city's latest report ...
Landslide mitigation refers to several human-made ... infill at the foot of the slope has a stabilising effect on a translational or deep rotational landslide, in ...