Exogenic processes are external processes, such as wind and rain, occurring on or above the Earth's surface. Where land is less covered and more exposed to. EXOGENIC PROCESSES AGENTS OF EROSION Refers to activities or phenomena that occur on the Earth's surface. Exogenic processes are. A – Exogenic processes affect the heat budget of the planet. B – They are important for delivery of materials. C – They are potentially related to mass extinctions.
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Removal of overlying rock load because of continued erosion causes vertical pressure release.
Exogenic Forces: Classification
Thus, the upper layers of the remaining rock expand exogenic processes produce disintegration of rock masses. Fractures will develop roughly parallel to exogenic processes ground surface. In areas of curved ground surfaces, arched fractures tend to produce massive sheets or exfoliated slabs.
Exfoliation is a result exogenic processes not a process. Flaking off of more or less curved sheets of shells from exogenic processes rocks or bedrocks results in smooth and rounded surfaces.
So, unloading and expansion create large, smooth rounded domes called exfoliation domes. With rising in temperature, every mineral expands and pushes against its neighbor and as the temperature falls, a corresponding contraction takes place.
What are endogenic and exogenic forces? - Quora
Due to differential heating and the resulting expansion and contraction of surface layers and their subsequent exfoliation from the surface results in smooth rounded surfaces in rocks.
Exogenic processes rock like granites, smooth surfaced and rounded exogenic processes to big boulders called tors form due to such exfoliation.
Cycles of freezing and thawing the weather becomes warmer and causes snow exogenic processes ice to melt causes frost weathering. It is most effective at high elevations in mid-latitude where freezing and melting is often repeated.
Rapid freezing of water causes its sudden expansion and high pressure. The resulting exogenic processes affects joints, cracks, and small intergranular fractures to become wider and wider till the rock breaks apart.
Salts in rocks expand due to thermal action, hydration and crystallization.
Many salts like calcium, sodium, magnesium, potassium and barium have a tendency to expand. The expansion depends on temperature and their thermal properties. High temperature ranges between 0 C of surface temperatures in desert favours exogenic processes salt expansions.
Exogenic Forces: Classification - Clear IAS
Salt crystallization is the most effective of exogenic processes salt weathering processes. It is favoured in areas of alternative wetting and drying conditions. When something is dissolved in water or acids, the water or acid with exogenic processes content is called as a solution.
This process involves removal of solids in solution and depends upon the solubility of a mineral in water or weak acids. When coming contact with water, many solids disintegrate and mix up as a suspension in water.
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Soluble rock forming exogenic processes like nitrates, sulphates, potassium etc are affected by this process.
This kind of weathering mainly occurs in a rainy Minerals like calcium carbonate and magnesium bicarbonate present in limestone are soluble in water containing carbonic acid formed with the addition of carbon dioxide in water and are exogenic processes away in water as a solution. Common salt is also a rock forming mineral and is susceptible to this process of solution.
Carbonation is the reaction of carbonate and bicarbonate with minerals and is common process helping to break down of feldspar and carbonate minerals.
Exogenic Processes- Science by Merlin Mariano on Prezi
Carbon exogenic processes from the atmosphere and soil air is absorbed by water to form carbonic acid that acts as a weak acid. Calcium carbonates and magnesium carbonates are dissolved in carbonic acid and are removed in a solution without leaving any residue resulting in cave formation.
Hydration is the chemical addition of water. Minerals take up water and expand; this expansion causes an increase in the volume of the material itself or rock. Exogenic processes process is reversible and long, continued repetition of this process causes fatigue in exogenic processes rocks and may lead to their disintegration.
In weathering, oxidation means a combination of a mineral with oxygen to form oxides or hydroxides.
Minerals most commonly involved in this are iron, manganese, sulphur etc.