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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 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 ...
Under the scheme, landslides are sub-classified by the material that moves, and by the form of the plane or planes on which movement happens. The planes may be broadly parallel to the surface ("translational slides") or spoon-shaped ("rotational slides").
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.
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 ...
Highway 1 is closed indefinitely from Palo Colorado Road to Rocky Creek Bridge, the California Department of Transportation said on social media after a new landslide eroded part of the roadway.
Gravitational failure includes shallow and rotational slides, slab and cantilever failures, and earthflows and dry granular flows. It is the process of detaching sediment primarily from a cohesive bank and transporting it fluvially. Shallow failure occurs where a layer of material moves along planes parallel to bank surfaces.
Historical maps of the ancient landslide complex, including one from the California Geological Survey, documented the slide's boundary to be well north of the Portuguese Bend Reserve, almost ...