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
