What is coastal slumping?
Slumping: involves a whole segment of the cliff moving down-slope along a saturated shear-plane.
What does the term slumping mean in relation to coastal processes?
Slumps occur due to a combination of factors. Marine processes erode and undermine the base of the cliff. This removes the support of the cliff. In addition rainfall infiltrates into the slope through unconsolidated porous material and then creates a slip plane as it reaches an impermeable material, such as clay.
How does slumping affect the coast?
With rotational slumping, heavy rain is absorbed by unconsolidated material making up the cliff (often glacial till, or boulder clay). The cliff face becomes heavier and eventually it separates from the material behind at a rain-lubricated slip plane.
What causes coastal slumping?
Sub-aerial processes, such as rainfall, also cause erosion. This often happens where layers of boulder clay, left behind by melting glaciers, become saturated and cause the cliff to slump. The debris on the beach is then eroded by the sea leaving the cliff exposed once more.
What is a slump in geography?
Slump is typically identified as the downward movement of a block of earth material along some curved surface of failure. Rotation of the slump block during movement generally takes place, and trees and other features are rotated with the block: Rotational slump along the Red River in north Fargo, July, 2000.
What is sliding and slumping?
Sliding allows the materials to fall downward in an inclined plane, whereas slumping allows the materials to fall downwcard along a curved plane. Sliding and slumping are two of the distinct mass wasting processes, where the loose and unconsolidated materials falls downward under the influence of gravity.
What’s the definition of slumping?
intransitive verb. 1a : to fall or sink suddenly. b : to drop or slide down suddenly : collapse. 2 : to assume a drooping posture or carriage : slouch. 3 : to go into a slump sales slumped.
What is slump in geography?
slump, in geology, downward intermittent movement of rock debris, usually the consequence of removal of buttressing earth at the foot of a slope of unconsolidated material. It commonly involves a shear plane on which a back-tilting of the top of the slumped mass occurs.
What is the difference between slumping and sliding?
As nouns the difference between sliding and slumping is that sliding is the motion of something that slides while slumping is the result of a slumping movement, like that of a mountain.
How do you identify a slump?
Slump material moves as a whole unit, leaving behind a crescent shaped scar. Figure 2. Trees with curved trunks are often signs that the hillside is slowly creeping downhill. Creep is the imperceptibly slow, steady, downward movement of slope-forming soil or rock.
What is slump and how it formed?
A slump is a form of mass wasting that occurs when a coherent mass of loosely consolidated materials or a rock layer moves a short distance down a slope. Causes of slumping include earthquake shocks, thorough wetting, freezing and thawing, undercutting, and loading of a slope.
What is slumping in geology?