Forces of Erosion and Deposition

Earth Science - Middle School

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landslide Natural Forces of Erosion and Deposition Many natural forces cause erosion and deposition, including gravity, moving water, glaciers, ocean waves and wind. These forces continuously wear down and build up material on the Earth’s surface. wind gravity waves glaciers water landslide mudow landslide mudow Gravity & Mass Mo vements of Rock Gravity can cause unstable rock material to move suddenly. Landslides and mudflows occur when loose soil and rocks slide down steep slopes. slump slump creep creep Wind Erosion & Deposition Wind causes erosion through deflation, the blowing away of surface materials, and through abrasion, the grinding down of rock by blown particles. Wind also deposits sand into land formations such as sand dunes and loess deposits. Slump is the sudden movement of a single large mass of rock material. Creep is caused by gravity, but is a slow downhill movement of sediment over time. landslide Forces of Erosion & Deposition © Copyright NewPath Learning. All Rights Reserved. 94-4547 Visit www.newpathlearning.com for Online Learning Resources. Photos courtesy of USGS, USFWS, USDA & NPS. mudflow deflation rock erodes over time abrasion slump creep gravity water glaciers waves wind
landslide mudow slump creep Type of Movement: ________________________________ __________________________________________________ __________________________________________________ __________________________________________________ __________________________________________________ Pause and Review Identify and describe each type of mass movement. Research to find real life examples of each type of occurance. Type of Movement: ________________________________ __________________________________________________ __________________________________________________ __________________________________________________ __________________________________________________ Type of Movement: ________________________________ __________________________________________________ __________________________________________________ __________________________________________________ __________________________________________________ Forces of Erosion & Deposition © Copyright NewPath Learning. All Rights Reserved. 94-4547 Visit www.newpathlearning.com for Online Learning Resources.