4-3. WEATHERING, EROSION, TRANS-PORTATION AND SEDIMENTATION4-3-1. Weathering

• Breakdown of rocks (minerals) and others on the surface of water (due to the surface conditions)

• Physical (mechanical), chemical, (biotic) weathering

• Physical weathering –due to physi-cal forces• Temperature change• Freezing (frost wedging)• Pressure change• Hydraulllic action• Mineral growth• Others: plant roots etc.

http://regentsearth.com/ILLUSTRATED%20GLOSSARY/Ice-Root%20Wedging.htm

http://teach.albion.edu/jjn10/physical-weathering/

http://teach.albion.edu/jjn10/physical-weathering/

http://teach.albion.edu/jjn10/physical-weathering/

• Chemical weathering – through chemical reactions• Hydrolysis• Leaching• Dissolution• Oxidation

Weathering of limestone. Youngwol

http://blog.naver.com/PostView.nhn?blogId=daphnech&logNo=60111108205&viewDate=¤tPage=1&listtype=0#

Parent is unknown. Kaolinite querries. Taebag

http://blog.naver.com/PostView.nhn?blogId=sanijeil&logNo=80108899859

4-3-2. Erosion, Transportation, and Sedimentation

Media

• Water (Streams)• Wind• Ice

Spoil tip in Rummu, Estonia. Hillside is covered with rills and gullies due to erosion processes caused by rainfall.

http://en.wikipedia.org/wiki/Erosion

Árbol de Piedra, a rock formation in the Altiplano, Bolivia sculpted by wind erosion.

http://en.wikipedia.org/wiki/Erosion

Glacial landforms.

http://www.eoearth.org/view/article/162987/

Types of Sediment Loads Carried by Streams:Dissolved load, Suspended load, Bed load

http://dc363.4shared.com/doc/00dWlveh/preview.html

Hjulström-Sundborg Diagram

http://en.wikipedia.org/wiki/Sediment_transportation#Settling_velocity

Nile delta

http://bittooth.blogspot.kr/2009/08/nile-guardian-and-disaster-without.html

Deep Springs Lake, eastern California. As the lake dries, it leaves behind evaporites. Springs issue from a fault zone near the bottom of the photo.

http://pages.uoregon.edu/millerm/playa.html

Yellow dust from China

http://acurx.tistory.com/1

Lateral and terminal moraines of a valley glacier, Bylot Island, Canada.

http://nsidc.org/cryosphere/glaciers/gallery/moraines.html