Erosion and Mass Movements Notes in Notebook or

Erosion and Mass Movements Notes in Notebook or on Looseleaf

Erosion n Erosion causes the wearing away and lowering of Earth’s land surface features as it transports material away n The sun fuels the water cycle and the forces of erosion

Mass Movements Triggers of Mass Movements Mass Movement: The transfer of rock and soil downslope due to gravity Factors that trigger mass movements: • Water-saturated Surface • Over-steepening of Slopes • Lack of Vegetation • Earthquakes.

Mass Movements Types of Mass Movements Classified on the kind of material, how it moves, and the speed of movement. Rockfalls/Debris Fall: When rocks or rock fragments fall freely through the air.

Mass Movements Types of Mass Movements Debris Flow: In a debris flow, a block of • Speed: 1 mm/ day to 1 km/hr material moves suddenly along a flat, inclined surface

Heavy Rains Can Trigger Slumps

Mass Movements Types of Mass Movements Flows include: Avalanches Mudflows • Mudflows Landslides

Mass Movements Types of Mass Movements Creep: the slow, downhill movement of soil Soil Creep moves more material per year than any other mass movement- even though it is slow, it is constantly happening *Creep can cause: Cracked roads, leaning utility poles, and bent trees

Videos n Watch both videos-Jot down 3 notes total n Landslides: https: //www. youtube. com/watch? v=mkn. S t. AMia 0 Q n Avalanches: n https: //www. youtube. com/watch? v=wcr 1 S l-T 9 S 0