Mechanical Weathering
Published on Mar 25, 2016
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PRESENTATION OUTLINE
Animal Actions
Animas that burrow in the ground. That breaks apart soil and rocks
Photo by Matt Romack Photography
Freezing and Thawing
Frost wedging widens cracks in sidewalks and causes potholes in streets.
Photo by subarcticmike
Plant Growth
plant roots enter cracks in rocks. Roots of even small plants can pry apart cracked rocks.
Photo by USFWS Pacific
Release of Pressure
As erosion removes material from the surface of mass of rock is reduced. This causes the rock to crack and flake off.
Photo by pocaagua
Abrasion
Sand and other rock particles that are carried by wind, water or ice can wear away exposed rock surfaces like sandpaper on wood.
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Photo by james_gordon_losangeles
