Creep. Creep, in geology, slow downslope movement of particles that occurs on every slope covered with loose, weathered material. Even soil covered with close-knit sod creeps downslope, as indicated by slow but persistent tilting of trees, poles, gravestones, and other objects set into the ground on hillsides.
Also question is, how does a creep happen?
Downhill creep, also known as soil creep or commonly just creep, is the slow downward progression of rock and soil down a low grade slope; it can also refer to slow deformation of such materials as a result of prolonged pressure and stress.
How can scope creep be avoided?
The single most important thing to avoid scope creep on your project is to document your requirements. Talk to all the project stakeholders and users to work out exactly what they want from the project. Write it down. Manage conflicts.
What causes Solifluction to occur?
Solifluction. the flow of wet, finely dispersed soil down a slope resulting from the perennial freezing and thawing of the ground. The development of solifluction results from decreased ground stability caused by meltwaters and rain and by freezing and thawing.
What is the most important agent of chemical weathering and why?
Water is the most important agent of chemical weathering. Two other important agents of chemical weathering are carbon dioxide and oxygen.
What is the difference between a slide and a slump?
Rockslides. Another type of mass wasting is a rockslide, which is the sliding of rock material down a mountain. It is similar to a slump, in that there is a mass failure of the slope, but a rockslide does not rotate as a block around an axis, like a slump.
What are the factors that are commonly trigger mass movements?
ES 5.3 Mass Movements
Mass movement. The transfer of rock and soil downslope due to gravity.
Saturation of surface materials with water.
Heavy rain, rapid snow melt, more Easily.
Man made, natural.
Kind of material that moves, how it moves, and the speed of movement.
Rockfall (from steep slopes; frost wedging)
Slide.
Rockslides.
What is triggered by Oversteepened slopes?
Trigger factors for Mass wasting: Oversteepening. The oversteepening of slopes. Usually; loose grain particles assume a stable slope called “the angle of repose” and create different slopes due to the type of particles. Oversteepened slopes are unstable.
What type of mass movement is the slowest?
Solifluction and creep are the slowest types of mass movement. Creep is the slowest of all the mass movements and moves the most soil out of all the mass movements. The only way to detect soil creep is to observe the fences, buildings, and other surface objects that may be in that area.
What is a flow in geology?
Debris flows are geological phenomena in which water-laden masses of soil and fragmented rock rush down mountainsides, funnel into stream channels, entrain objects in their paths, and form thick, muddy deposits on valley floors.
Which is the slowest form of mass wasting?
4) creep This is the slowest type of mass wasting, requiring years of gradual movement to have a pronounced effect on a slope. Slopes creep due to the expansion and contraction of surface sediment, and the pull of gravity.
How do landslides form?
When earthquakes occur on areas with steep slopes, many times the soil slips causing landslides. Furthermore, ashen debris flows caused by earthquakes can also trigger mass movement of soil. Heavy Rainfall: When sloped areas become completely saturated by heavy rainfall many times landslides can occur.
What are the causes of soil creep?
Creep. The slow, often imperceptible downslope movement of soil or other debris is called creep. Because creep moves materials so slowly, it is difficult to discern directly. Creep is caused by the interaction of multiple factors, but heaving is likely the most important process.
What causes creep and how can it be recognized?
What causes creep, and how can it be recognized? creep is caused by the repeated expansion and contraction of the regolith, which may be caused by repeated freezing and thawing or wetting and drying. creep can be recognized by tilted trees, tilted fences, and displaced retaining walls.
What causes Solifluction to occur?
Solifluction. the flow of wet, finely dispersed soil down a slope resulting from the perennial freezing and thawing of the ground. The development of solifluction results from decreased ground stability caused by meltwaters and rain and by freezing and thawing.
How does creep occur?
In materials science, creep (sometimes called cold flow) is the tendency of a solid material to move slowly or deform permanently under the influence of mechanical stresses. It can occur as a result of long-term exposure to high levels of stress that are still below the yield strength of the material.
Where does soil creep occur?
Downhill creep, also known as soil creep or commonly just creep, is the slow downward progression of rock and soil down a low grade slope; it can also refer to slow deformation of such materials as a result of prolonged pressure and stress.
What is a Solifluction in geology?
geology. Alternative Title: gelifluction. Solifluction, flowage of water-saturated soil down a steep slope. Because permafrost is impermeable to water, soil overlying it may become oversaturated and slide downslope under the pull of gravity. Soil that has been opened and weakened by frost action is most susceptible.
What is the controlling force of mass wasting?
Gravity is the controlling force of mass wasting. Other factors that influence or trigger downslope movements are saturation of the material with water, oversteepening of slopes beyond the angle of repose, removal of vegetation, and ground shaking by earthquakes.
Where do slumps occur?
A slump is a form of mass wasting that occurs when a coherent mass of loosely consolidated materials or rock layers moves a short distance down a slope. Movement is characterized by sliding along a concave-upward or planar surface.
What role does wind play in the processes of erosion and deposition?
Water plays an important role in weathering and breaking down rock. Rocks are hard and strong, but they do not stay that way forever. Forces like wind and water break down rocks through the processes of weathering and erosion. Weathering and erosion help shape Earth’s surface.
How a landslide is caused?
A landslide is any geologic process in which gravity causes rock, soil, artificial fill or a combination of the three to move down a slope. Several things can trigger landslides, including the slow weathering of rocks as well as soil erosion, earthquakes and volcanic activity.
What is a Terracettes?
In geomorphology, a terracette is a type of landform, a ridge on a hillside formed when saturated soil particles expand, then contract as they dry, causing them to move slowly downhill. An example of this is the manger near the Uffington White Horse.