Lesson 3 Flashcards
Occur on the earth’s crust/surface.
Exogenic process
Force that derive from the earth’s exterior
Exogenic forces
Mechanjcal disintegration and chemical decomposition of rocks
Weathering
Process depends on the forces that could be gravitational, load, shearing, expention force
Physical/Mechanical weathering
Caused by continues erotion causing vertical pressure release
Unloading and Expansion
When temperature rises the mineral expands and when it goes down it shrinks
Temperature changes and expansion
Rapid freezing of water causes its sudden expansion
Freezing, thawing and frost wedging
Depends on the temperature and thermal properties, salt crystallization
Salt weathering
Due to solution, carbonation, hydration, oxidation and reduction
Chemical weathering
When something desolved in water or acids.
Solution
Helps break down feldspar and carbon acids breaks down rocks
Carbonation
Minerals take up water and expand causing it to break
Hydration
Combination of minerals with oxygen to form oxides
Oxidation and reduction
Growth or movements of organism
Biological weathering
Transfer of mass of rock debris
Mass movement
Soil covered slopes lubricated by water
Creep
Slow down slopes flowing of soil mass of fine-grained rocks
Solifluction
Water saturated clay or silthy earth. Hills or low terraces
Earth flow
Covered with heavy rainfall. Composed of water
Mud flow
Similar to snow avalanche
Debris avalanche
Relatively dry, slump, debris slide
Landslide
Slipping of several units or rock debris
Slump
Transportation of rocks + result of erotion
Erotion deposition
