Parent Material and Weathering

Weathering

Rocks
and
Minerals

Primary
Minerals

Secondary
Minerals

Rocks

Weathering
Products

Physical
Weathering

Chemical
Weathering

Weathering
Rates

Parent
Materials

Take a
Test

 

Soil Formation of Soil Parent Material

weatheringequation.JPG (11223 bytes)
eration


Mineral grains in rocks are broken apart by the forces of physical weathering.
This unconsolidated material is then subjected to the forces of chemical
weathering in the soil solution, being converting to more stable secondary soil minerals

and solutes.   These solutes can be leached out, which can accelerate weathering.

Mechanism of Gas Exchange in Soils

Prevents O2 deficiency or CO2 Toxicity