EXOGENIC PROCESSES Castañares, Angellyn Castillo, Sofia
EXOGENIC PROCESSES or DENUDATION
> Refers to activities or phenomena that occur on the earth's surface.
> Weathering, Soil Formation, Erosion
> Related to the atmosphere, hydrosphere, biosphere
WEATHERING> This process reduces the size of rocks and prepares materials for transport.
> Different climate conditions, temperature fluctuations, and even the location of rocks affect this process.
> Mechanical & Chemical Weathering
WEATHERING: Mechanical
> The breaking down of rocks without changing their chemical composition.
> Mechanical process depend on some applied forces: a. Wind b. Water c. Gravity
WEATHERING: Chemical
> The breaking of rocks by chemical mechanisms: a. Hydration – a reaction that occurs when the minerals in a rock dissolve when they come in contact with water.
b. Carbonation – the reaction between rocks and carbonic acid formed by the dissolution of carbon dioxide in water.
c. Oxygen – may react with metal in rocks, oxidizing these metals and changing their physical and chemical properties.
EROSION
> Takes place when the material is moved/transported from oe place to another by natural elements such as moving water, wind, gravity, and animals.