Crossword clues for erosion
- The mechanical process of wearing or grinding something down (as by particles washing over it)
- Condition in which the earth's surface is worn away by the action of water and wind
- Geology subject
- Problem on shores
- Environmentalist's concern
- What glaciers cause
- Slow disintegration
- Geology topic
- Land destruction
Longman Dictionary of Contemporary English
The Collaborative International Dictionary
Erosion \E*ro"sion\, n. [L. erosio. See Erode.]
The act or operation of eroding or eating away.
The state of being eaten away; corrosion; canker.
The wearing away of the earth's surface by any natural process. The chief agent of erosion is running water; minor agents are glaciers, the wind, and waves breaking against the coast.
a gradual reduction or lessening as if by an erosive force; as, erosion of political support due to scandal; erosion of buying power by inflation. [fig.]
Douglas Harper's Etymology Dictionary
1540s, from Middle French erosion (16c.), from Latin erosionem (nominative erosio) "a gnawing away," noun of action from past participle stem of erodere "gnaw away" (see erosion). Related: Erosional.
n. 1 (context uncountable English) The result of having been being worn away or eroded, as by a glacier on rock or the sea on a cliff face. 2 (context uncountable English) The changing of a surface by mechanical action, friction, thermal expansion contraction, or impact. 3 (context uncountable figurative English) The gradual loss of something as a result of an ongoing process. 4 (context uncountable English) Destruction by abrasive action of fluids. 5 (context mathematics image processing English) One of two fundamental operations in (w: morphological image processing) from which all other morphological operations are derived. 6 (context dentistry English) Loss of tooth enamel due to non-bacteriogenic chemical processes. 7 (context medicine English) A shallow ulceration or lesion, usually involving skin or epithelial tissue.
condition in which the earth's surface is worn away by the action of water and wind
a gradual decline of something; "after the accounting scandal there was an erosion of confidence in the auditors"
In earth science, erosion is the action of surface processes (such as water flow or wind) that remove soil, rock, or dissolved material from one location on the Earth's crust, then transport it away to another location. The particulate breakdown of rock or soil into clastic sediment is referred to as physical or mechanical erosion; this contrasts with chemical erosion, where soil or rock material is removed from an area by its dissolving into a solvent (typically water), followed by the flow away of that solution. Eroded sediment or solutes may be transported just a few millimetres, or for thousands of kilometres.
Natural rates of erosion are controlled by the action of geomorphic drivers, such as rainfall; bedrock wear in rivers; coastal erosion by the sea and waves; glacial plucking, abrasion, and scour; areal flooding; wind abrasion; groundwater processes; and mass movement processes in steep landscapes like landslides and debris flows. The rates at which such processes act control how fast a surface is eroded. Typically, physical erosion proceeds fastest on steeply sloping surfaces, and rates may also be sensitive to some climatically-controlled properties including amounts of water supplied (e.g., by rain), storminess, wind speed, wave fetch, or atmospheric temperature (especially for some ice-related processes). Feedbacks are also possible between rates of erosion and the amount of eroded material that is already carried by, for example, a river or glacier. Processes of erosion that produce sediment or solutes from a place contrast with those of deposition, which control the arrival and emplacement of material at a new location.
While erosion is a natural process, human activities have increased by 10-40 times the rate at which erosion is occurring globally. Excessive (or accelerated) erosion causes both "on-site" and "off-site" problems. On-site impacts include decreases in agricultural productivity and (on natural landscapes) ecological collapse, both because of loss of the nutrient-rich upper soil layers. In some cases, the eventual end result is desertification. Off-site effects include sedimentation of waterways and eutrophication of water bodies, as well as sediment-related damage to roads and houses. Water and wind erosion are the two primary causes of land degradation; combined, they are responsible for about 84% of the global extent of degraded land, making excessive erosion one of the most significant environmental problems world-wide.
Intensive agriculture, deforestation, roads, anthropogenic climate change and urban sprawl are amongst the most significant human activities in regard to their effect on stimulating erosion. However, there are many prevention and remediation practices that can curtail or limit erosion of vulnerable soils.
Erosion is the gradual removal of a substance by chemical or mechanical means. It may refer to:
- Geological Erosion
- Bank erosion
- Binary erosion
- Erosion of the skin
- Tooth erosion
- Wind erosion
- Coastal erosion
Usage examples of "erosion".
One treatment that was administered for nasal catarrh, from which I continued to be affected, caused erosion of the mucous membrane, and destruction of the bony septum which separates the two nostrils.
It was just this primary erosion that the nineteenth century sought in its concern to historicize everything, to write a general history of everything, to go back ceaselessly through time, and to place the most stable of things in the liberating stream of time.
Garden, riders called the place, the area all around and northeast of Anveney, where the soil lay completely bare and prone to erosion, gullies leading to gullies leading to a wash that ran down to a river that ran through barren banks a long, long way before the inpouring of other streams began to put more life into Limitation River than death could take out.
The really perilous course lies in preserving the status quo and institutionalizing our past failed policies: open borders, unlimited immigration, dependence on cheap and illegal labor, obsequious deference to Mexico City, erosion of legal statutes, multiculturalism in our schools, and a general breakdown in the old assimilationist model.
Most of the littoral plain between the hills and the sea was buildup from that erosion.
In prehistoric times, the tribal and nomadic people of the Mediterranean basin overcut and overgrazed the land so severely that the scars of the resulting erosion can still be seen.
The shwpi have overgrazed the world, allowing the storms to pick up and redistribute a lot of soil through wind erosion.
These figures are for arable land and do not include the general erosion and degradation of lands all over the earth from human activities such as deforestation, overgrazing, fire, and other injudicious human occupancy.
Meanwhile, as the land available for grazing shrinks, the number of grazing animals swells-a sure-fire formula for overgrazing, wind erosion, and desertification.
Erosion and overgrazing had produced that desert, not war, though there were mildly radioactive patches all across it.
They drove at high speed through patches of thicket, and forlorn stands of trees, but mostly over rolling countryside denuded of vegetation by centuries of overplanting and soil erosion, until the guard tower next to the main gate came into view.
The effects of this glacial action and of the long periods of erosion preceding it and of other physiographic changes connected with its passing away, have most important bearings on the distribution and character of the gold-bearing alluviums of the province.
From looking at his own farmland, he could see that soil was created by the erosion of rocks and that particles of this soil were continually washed away and carried off by streams and rivers and redeposited elsewhere.
He visualized erosion by the sting of saltating sand grains, driven by the wind.
An unconformity is a lack of continuity in deposition between strata in contact with each other, corresponding to a period of nondeposition, weathering, or, as in this case, erosion.