Mass Wasting

Movement caused by gravity, in which rock, soil, and debris moves downslope in bulk.

A general term for the downslope movement, fasr or slow, of rock, soil, and debris.

The very slow, continous downslope movement of rock, soil, and debris.

The downslope movement of water saturated material occuring within permafrost areas.

A rapid downslope movment of debris (rock, soil, and mud).

A slow rapid form of slope failure in which the debris moves downslope as a viscious fluid.

A flowing mixture of debris (mud and water) usually within some type of channel or swale area.

A mudflow consisting of volcanic debris.

A very rapid and turbolent failure of debris consisting of air, and water.

Downslope movement in which material fails along a curved surface of rapture.

A rock mass that fails along a plane of weakness (e.g., bedding plane and joint plane).

Rocks falling freely or bouncing down a cliff.

An accumulation of broken rock at the base of a cliff.

The sinking o setting of the ground surface with respect to surrounding areas.

A naturally formed underground chamber.

Removing water and oil from the compound, debris or soil.

Gravity attemps to bring over-steepened sloped into equilibrium.

The component of gravitational force that is perpindicular to the surface.

A resisting force which acts against the shier force, typically a function of friction and normal force.

The resistance to movement or deformation of material.

The hanging-wall block moved down relative to the footwall block.

Adds weight, reduces the shear strength of the rock and soil, lubricates etc.

This type of motion can cause ground cracks, landslides, ground lurching, and liquification.

The placement of addition material of weight along the top of a slope, therby creating on vastable slope condition.

The removal of support from the base of a slope.

Bedding planes, fracutures, and joints.

Vibrations from traffic, large explosions.

Buttress fill slopes, retaining walls, tieback anchors, caissons, soldier piles, etc.

Good drainage, planting, covering areas with impervious layers, dewarting wells (vertical and horizontal etc.)