T4+Slides

T4+Slides - Physical and Chemical Weathering Topic #4 Goals...

Info iconThis preview shows pages 1–4. Sign up to view the full content.

View Full Document Right Arrow Icon
1 Physical and Chemical Weathering Topic #4 Goals Understanding the importance of physical weathering in soil formation Understand the types of chemical weathering and dominant acid sources Understand the factors controlling the rates of chemical weathering Physical Weathering – Increases surface area Chemical weathering is a function of surface area Heating and Cooling Microfractures develop in the zone of fluctuating temperature and they eventually coalesce to break the outer layer of rock The volume of water expands 9% in forming ice Ice fracturing is an important mechanism is formation of talus slopes (colluvium)
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
2 Water abrasion rounds rocks Glaciers Grind Rocks All soil scrapped off Glacial till Wind Abrasion Plants can generate tremendous forces to fracture rocks Plants can generate tremendous forces to fracture rocks Roots within rocks
Background image of page 2
3 Pressure Release Joints form upon cooling of magma and from release of weight as erosion removes rock from the surface Exfoliation
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 4
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 5

T4+Slides - Physical and Chemical Weathering Topic #4 Goals...

This preview shows document pages 1 - 4. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online