EXOGENICPROCESSES

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.

EROSION

SOIL FORMATION