Term
|
Definition
| movement in which bedrock, rock debris, or soil moves downslope in bulk, or as a mass, because of the pull of gravity. |
|
|
Term
|
Definition
| very rapid descent of rock or soil |
|
|
Term
|
Definition
| any unconsolidated or weakly consolidated material at the earth's surface, regardless of particle size or composition |
|
|
Term
|
Definition
| coarse grained fragments predominate in the soil |
|
|
Term
|
Definition
| material that is predominately fine grained |
|
|
Term
|
Definition
| high content of water, clay, and silt |
|
|
Term
|
Definition
| descending mass is moving downslope as a viscous fluid |
|
|
Term
|
Definition
the descending mass remains relatively intact, moving along one or more well defined surfaces.
|
|
|
Term
|
Definition
material moves along a curved surface
upper part moves downward while the lower part moves outward |
|
|
Term
|
Definition
material moves along a planar surface
moves along a plan approximately parallel to the slop of the surface |
|
|
Term
|
Definition
occurs when material free falls or bounces down a cliff
|
|
|
Term
|
Definition
| vertical distance between valley floor and mountain summit |
|
|
Term
|
Definition
parallel to the slope and indicates the block's ability to move.
component of gravitational force parallel to slope in downslope direction; if shear force is greater than shear resistance due to friction, downslope movement will occur. |
|
|
Term
|
Definition
the resistance to movement or deformation of that soil
resistant to downslope movement through friction between soil particles |
|
|
Term
|
Definition
| very slow, downslope movement of soil, due mostly to freeze/thaw cycles |
|
|
Term
|
Definition
| earth moves downslope as a viscous fluid, can be slow or rapid |
|
|
Term
|
Definition
| flow of water saturated soil over impermeable material (permafrost) |
|
|
Term
|
Definition
| ground that remains frozen for many years |
|
|
Term
|
Definition
| flow involving soil in which coarse material is predominant |
|
|
Term
|
Definition
| a flowing mixture of soil and water, usually moving down a channel |
|
|
Term
|
Definition
| a very rapidly moving turbulent mass of debris, air, and water |
|
|
Term
|
Definition
| coherant blocks of bedrock falling or sliding downslope. |
|
|
Term
|
Definition
| apron of fallen rock fragments that accumulates at the base of a cliff |
|
|
Term
|
Definition
| the rapid sliding of a mass of bedrock along an inclined surface of weakness, such as a bedding plane, a major fracture in rock, or a foliation plane. |
|
|
Term
| factors that enhance mass wasting |
|
Definition
undercuting
vegetation removal
mass redistribution
role of water |
|
|
