Terms in this set (39)
is movement in which bedrock, rock, debris, or soil moves downslope in bulk, or as a mass, because of the pull of gravity.
a general term for the slow to very rapid descent of rock or soil.
Is parallel to the slope and indicates the blocks ability to move.
The resistance to movement or deformation of that soil.
the vertical distance between valley floor and mountain summit.
Can be debris, earth, or mud.
Implies the coarse grained fragments predominate in the soil.
If the material is predominantly fine grained (sand, silt, clay).
has high content of water, clay, and silt.
means the descending mass remains relatively intact, moving along one or more well-defined surfaces.
occurs when material free-falls or bounces down a cliff.
the descending mass moves along a plane approximately parallel to the slope of the surface.
Rotational slide (Slump)
involves movement along a curved surface, the upper part moving downward while the lower part moves outward.
is very slow, downslope movement of soil.
Earth moves downslope as a viscous fluid; the process can be slow or rapid.
is the flow of water-saturated soil over impermeable material.
Ground that remains frozen for many years.
Is flow involving soil in which coarse material is predominant
is a flowing mixture of soil and water, usually moving down a channel.
The fastest variety of debris flow
When a block of bedrock breaks off and falls freely or bounces down a cliff.
Commonly an apron of fallen rock fragments.
the rapid sliding of a mass of bedrock along an inclined surface of weakness, such as a bedding plane, a major fracture in the rock, or a foliation plane
Is a very rapidly moving, turbulent mass of broken up bedrock
Is a body of water that is confined in a channel and moves downhill under the influence of gravity.
A long narrow depression eroded by the stream into rock or sediment.
A thin layer of unchanneled water flowing downhill
the total area drained by a stream and its tributaries.
is a small stream flowing into a larger one.
A ridge or strip of high ground dividing one drainage basin from another.
The arrangement in a map view of a river and its tributaries.
If the patten resembles branches of a tree or nerve dendrites.
in which streams diverge outward likes spokes of a wheel, forms on high conical mountains, such as composite volcanoes and domes.
In which tributaries have frequent 90 degree bends and tend to join other streams at right angles.
consists of parallel main streams with short tributaries meeting them at right angles.
The distance water travels in a stream per unit time.
the downhill slope of the bed (or the water surface, if the stream is very large).
is the volume of the water that flows past a given point in a unit of time.
refers to the ability of flowing water to pick up and move rock and sediment.