Physical and Chemical Weathering in Geochemical Cycles pp | Cite as. Slope Erosion and Mass Movement in Relation to Weathering in . O., , Sediment and solute yields in British Columbia and Yukon, in V. Gardiner, ed. Mass Wasting >. Erosion >. Transport >. Deposition. Weathering. The mechanical disintegration and/or chemical decomposition that fragments rock Difference between a joint and fault: Relationships between climate and weathering. Weathering, Mass Wasting, and Erosion are related Refers to material that falls under influence of gravity with little or no transporting agent; Processes range.
Mass wasting occurs both above and below water. What Causes Mass Wasting? Slopes are very common in nature.
Mass Wasting (Mass Movement) - Weathering and Erosion - Geology for Kids
The sides of mountains and hills are all slopes. When a slope becomes unstable, the likelihood of mass wasting increases. This can happen for a variety of reasons.
If the slope is exposed to weatheringthe material it is made of will weaken. The weaker this material gets, the more likely that sediment will fall down the slope. Have you ever poured water into the dirt and watched it turn into mud?
How does the mud differ from the dry soil? If you run your hands through it, it feels very soft. You could squish it through your fingers! This happens because the water has found its way between all the particles in the soil.
The soil becomes almost likealiquid! This same thing happens often in nature.
A slope will weaken if it absorbs too much water, such as when a storm passes over a mountain. The combination of small movements of soil or rock in different directions over time are directed by gravity gradually downslope.
The steeper the slope, the faster the creep. The creep makes trees and shrubs curve to maintain their perpendicularity, and they can trigger landslides if they lose their root footing.
Mass wasting - Wikipedia
The surface soil can migrate under the influence of cycles of freezing and thawing, or hot and cold temperatures, inching its way towards the bottom of the slope forming terracettes. Landslides[ edit ] A landslidealso called a landslip, is a slow or rapid movement of a large mass of earth and rocks down a hill or a mountainside. Little or no flowage of the materials occurs on a given slope until heavy rain and resultant lubrication by the same rainwater facilitate the movement of the materials, causing a landslide to occur.
In particular, if the main feature of the movement is a slide along a planar or curved surface, the landslide is termed slump, earth slide, debris slide or rock slide, depending on the prevailing material. Movement of soil and regolith that more resembles fluid behavior is called a flow. These include avalanchesmudflowsdebris flowsearth flowlahars and sturzstroms. Water, air and ice are often involved in enabling fluid-like motion of the material.
A fall, including rockfall and debris fall, occurs where regolith cascades down a slope, but is not of sufficient volume or viscosity to behave as a flow.
Falls are promoted in rocks which are characterized by the presence of vertical cracks. Falls can also result from undercutting by running water as well as by waves. They usually occur at very steep slopes such as a cliff face.