### process | erosion:

Abrasion
* are a simple reddening of the skin, occasionally some loss of skin
  - common sports injuries in which a layer of skin is rubbed off
  - surface wounds where layers of skin are scraped or torn
  - wounds in which the outer layer of the skin has been rubbed or scraped off
* can also occur from the particles held in the erosional mediums of wind and water
  - be more damaging than UV radiation
  - break the surface of the porcelain, letting lead get out
* is an alternative term for corrasion
  - injury caused by scraping away a portion of skin
  - particle by particle erosion
* is the number one cause of death for a polyethylene canoe
  - result of stones and grit in the basal ice grinding over the substratum
* is the wearing away of a tooth by another object such as a toothbrush
  - an area of the skin by friction
  - rocks by solid particles carried by wind, water or other forces
  - very active in glaciers where the particles are firmly held by ice
  - when rock frozen to the base and the back of the glacier scrapes the bed rock
* occurs from grinding against other rock particles.
* often occurs when the fruit has contact with the ground.
* rub or scrape away the outer layers of skin, causing pain, swelling, redness, and heat.
* usually heal in a short time period, sometimes within hours.
* wound where the skin layers have been scraped off.

### process | erosion | abrasion:

Air abrasion
* can prepare a very small, new cavity for filling with a white filling.
* conserves healthy tooth structure and helps reduce future tooth fractures.
* cuts a narrow path through the tooth enamel.
* involves the use of a high-pressured instrument similar to a tiny sandblaster.
* is good with early decay and helps to preserve tooth structure.

Corneal abrasion
* are the most common eye injury.
* superficial scratch of the cornea.

Graze
* are abrasion
  - eating
* stubbles heavily to reduce fungus carryover.
* wheatgrasses heavily for a short time in the late fall or early spring of each year.

### process | erosion:

Accelerated erosion
* can change the environment too rapidly for organisms to adapt.
* causes too much sediment to enter our rivers and streams.
* is largely the consequence of human activity
  - more rapid than normal erosion and results primarily from man's activities
  - the most serious form of soil degradation
* occurs as a result of destruction of vegetal cover or of some activity of man
  - whenever the soil surface is disturbed
* significant feature of the basaltic uplands.
* takes place by the action of water, wind, gravity and glaciers.

Bank erosion
* Some bank erosion increases water turbidities.
* causes sedimentation in streambed gravel.
* involves the undercutting and scouring of natural stream and drainage channel banks.
* sloughs sediment into rivers, lakes and streams.

### process | erosion:

Coastal erosion
* Most coastal erosion occurs over time.
* Some coastal erosion has human activities.
* accelerates as sea level rises.
* continuing problem in most low-lying Pacific islands.
* ensures that the islands nature is in a constant state of change.
* has both natural causes and causes related to human activities.
* is as serious a threat as coastal flooding
  - caused by a combination of natural processes and human interference
* natural process even in pristine environments.
* occurs along beaches and shorelines
* results in deterioration.
* serious problem on many coasts.
* takes land away forever from one area to deposit it someplace else.