As used in this report, the process of decomposition of rocks or ores through the action of air and water.
1. The action of atmospheric agencies or elements on substances exposed to them. 2. The discoloration, disintegration, etc., that results from this action.
The breakdown of rocks at the Earth's surface as a result of chemical reaction or mechanical abrasion.
all of the changes rocks go through at or near the Earth's surface.
the processes that decay or break up rocks by a combination of physically fracturing or chemically decomposing them.
The breakdown or decay of rock on the earth's surface, by the action of wind or water.
The set of all processes that decay and break up rock by a combination of physical fracturing and chemical decomposition.
( Ped.). All physical and chemical changes produced in rocks, at or near the earth's surface, by atmospheric agents, and which result in more or less complete disintegration and decomposition. ( SSSA).
The adverse effects of age, water, and chemicals that decompose glass. Typically the glass degrades into thin iridescent layers, often occurs with pitting. Transparency, details and original color of the glass become obscured. The colorful effect was copied during the nineteent century in Europe and America..
The processes that break up and corrode solid rock, eventually transforming it into sediment.
the action of the elements in altering the color, texture, composition, or form of exposed objects, removing material physically or chemically. Water, wind, trees, and chemicals can cause weathering. At Mammoth Cave, the limestone is weathered by carbonic acid.
(4) the process by which particles, rocks and minerals are altered on exposure to surface temperature and pressure, and atmospheric agents such as air, water and biological activity
Physical, chemical or biological breakdown of rocks and minerals into smaller sized particles.
A broad term encompassing exposure of plastics to solar or ultraviolet light, temperature, oxygen, humidity, rain, snow' wind, and air-borne biological and chemical agents.
Behavior of paint films when exposed to natural weather or accelerated weathering equipment, characterized by changes in color, texture, strength, chemical composition or other properties.
Physical and chemical processes in which solid rock exposed at earth's surface is changed to separate solid particles and dissolved material, which can then be moved to another place as sediment. See erosion.
The process of seasoning by exposure to the elements.
A process in which rocks are disintegrated into soils.
Surface deterioration of a coating surface during outdoor exposure. The use of antioxidants, UV light stabilizers, etc... permits to have a greater weathering. Syn. Aging
Changes in rocks brought about by exposure to air, water, changing temperatures, and reactive chemical agents.
all physical and chemical changes produced in rocks and soils by the forces of climate
total of all processes acting at or near the Earth’s surface to cause physical disruption and chemical decomposition of rock
In geology, weathering is the breakdown of rock into smaller pieces, or into different substances, by mechanical and chemical processes. Rocks can weather into soil, for instance. Weathering speeds erosion. Back
The processes by which rocks are chemically altered or physically broken into fragments as a result of exposure to atmospheric agents and the pressures and temperatures at or near Earth's surface, with little or no transportation of the loosened or altered materials.
processes that change rock at or near the earth's surface.
The mechanical, chemical, or organic breakdown of rock at or near to the surface of the Earth.
the natural processes by which the actions of atmospheric and other environmental agents, such as wind, rain, and temperture changes, result in the physical disintegration and chemical decomposition of rocks and earth materials in place, with little or no transport of the loosened or altered material.
The action of water on exposed materials - glass.
all physical and chemical changes produced in rocks or other deposits by atmospheric agents. These changes result in disintegration and decomposition of the material.
the natural erosion of rock surfaces, usually through wind or water action.
the process by which particles, rocks and minerals are altered upon exposure to surface temperatures and pressure, air, water, wind and biological activity
The physical or chemical decomposition of rock due to exposure to atmospheric elements; contrast with erosion.
The degree of attack on a coated surface by atmospheric conditions.
to break down rock naturally; water, growing plants, heat, cold, and ice all weather rocks; over many years weathering turns rock into soil.
breakdown of rock or other geological materials (e.g., alluvium) into soil. by physical disintegration and chemical reaction.
chemical or mechanical breakdown of rock surfaces.
the process in which solid rock on the earth's surface is worn, and changed to separate solid particles and dissolved material
The process by which exposure to atmospheric agents, such as air or moisture, causes rocks and minerals to break down. This process takes place at or near the Earth's surface. Weathering entails little or no movement of the material that it loosens from the rocks and minerals. Rocks that have
the decomposition of rock, or building materials owing to the physical and chemical action of weather
The chemical and physical processes that disaggregate a rock into its component mineral grains or crystals.
physical and chemical disintegration, alteration. and decomposition of rocks and minerals at or near the earth's surface by atmospheric agents.
The process of slowly breaking down rocks into smaller pieces (staring with boulders, ending up with sand.)
Discoloration of wood surface due to prolonged exposure to sun, rain, wind, light, etc. Application of a bleaching oil will speed up this process.
The attack on glass surface by atmospheric elements.
The destructive effects of air, wind, water or ice, by which rocks are changed in colour, texture, composition or form. Most weathering occurs at the surface, but it may take place deep under the surface as water and oxygen penetrates into rocks through joints.
The actions of the weather to change the texture, color, strength and composition of a material and its finish.
The physical and chemical changes produced by exposure of rocks and minerals to atmospheric agents such as wind, water and ice.
the natural chemical or physical alteration of an object or deposit through time.
The mechanical or chemical disintegration and discolouration of the surface of wood caused by exposure to light, the action of dust and sand carried by winds, and the alternate shrinking and swelling of the surface fibres with the variation in moisture content. Weathering does not include decay.
The group of processes, chemical and physical, whereby rocks on exposure to the weather, change in character, decay, and finally crumble into soil.
Exposure of plastics to the outdoor environment.
the group of processes (such as chemical action of air and rainwater and the biological action of plants and animals) whereby rocks and minerals change in character, disintegrate, decompose, and synthesize new compounds and clay minerals.
Physical and chemical breakdown of rocks due to natural processes
A combination of physical and environmental processes, such as evaporation, dissolution, dispersion, and emulsification, which act on spilled oil to change its physical properties and composition.
The mechanical, chemical, or biological action of the atmosphere, hydrometeors, and suspended impurities on the form, color, or constitution of exposed material; to be distinguished from erosion. Mechanical weathering results from the disintegrating action of high or low temperature, large changes of temperature, frost, or the impact of wind-borne sand or water (e.g., frost action, scouring, etc.). Chemical weathering is due to the chemical action of atmospheric constituents, especially acid impurities, in a moist atmosphere or in rainwater (e.g. corrosion, oxidation, etc.). Biological agents are mainly fungi that attack organic material (e.g., rotting, mildew, etc.). Brooks, C. E. P., 1950: Climate in Everyday Life, 179–187.
The change in appearance of paint caused by exposure to nature. The physical disintegration and chemical decomposition of materials on exposure to atmospheric agents
The mechanical or chemical disintegration & discolouration of the surface of wood caused by exposure to light, the action of dust & sand carried by winds, & the alternate shrinking & swelling of the surface fibres with the continual variation in moisture content, brought by changes in the weather.
The effect of exposure to weather on paint films.
Degradation of rocks at the Earth’s surface by climatic forces;
The tendency of some O-ring seals to surface crack upon exposure to atmospheres containing ozone and other pollutants.
The effect of atmospheric elements on a test subject when exposed out of doors in a natural environment or under environmental influences. Natural outdoor weathering tests are normally carried out at selected exposure sites, on printing panels, exposed either vertically or at 45o facing south in the Northern Hemisphere.
Natural alteration by either chemical or mechanical processes due to the atmosphere, surface waters, soil and other ground waters, or to temperature changes.
the destructive process by which earth and rock materials exposed to the atmosphere undergo physical disintegration and chemical decomposition resulting in changes in color, texture, composition, or form. Processes may be physical, chemical, or biological. Differential Weathering - when weathering across a rock face or exposure occurs at different rates; mainly due to variations in the composition and resistance of the rock. This results in an uneven surface with the more resistant material protruding. Mechanical Weathering - the physical processes by which rocks exposed to the weather change in character, decay, and crumble into soil. Processes include temperature change (expansion and shrinkage), freeze-thaw cycle, and the burrowing activity of animals. CO Landslide Mitigation Plan
Paint film deterioration as a result of exposure to the weather.
Changes on the surface of glass caused by chemical reaction with the environment. Weathering usually involves the leaching of alkali from the glass by water, leaving behind siliceous weathering products that are often laminar.
The decay and breakup of rocks on the earth's surface by natural chemical and mechanical processes. The mechanical action includes large changes of temperature, extreme temperatures, frost, or the impact of wind borne sand or water. Chemical action includes the chemical reactions between atmospheric constituents in a moist environments or in rain water. Biological agents are mainly fungi which attack organic material.
the chemical and physical processes acting to break down materials at the earth's surface. [AHDOS
Weathering is the process of breaking down of rocks, soils and their minerals through direct, or indirect contact with the atmosphere. Weathering occurs in situ, or 'without movement', and thus should not to be confused with erosion, which involves the movement and disintegration of rocks and minerals by processes such as water, wind, ice or gravity.