Upload
emanuel-thoburn
View
230
Download
0
Embed Size (px)
Citation preview
ErosionErosion Erosion causes the wearing away Erosion causes the wearing away
and lowering of Earth’s land and and lowering of Earth’s land and surface features as it transports surface features as it transports material away material away
The sun fuels the water cycle The sun fuels the water cycle and the forces of erosionand the forces of erosion
Triggers of Mass Movements
Mass MovementsMass 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.
Types of Mass Movements
Mass MovementsMass Movements
Mass movements are classified on the kind of material that moves, how it moves, and the speed of movement.
Rockfalls/Debris Fall: When rocks or rock fragments fall freely through the air.
Types of Mass Movements
Mass MovementsMass Movements
• Speed: 1 mm/ day to 1 km/hr
Debris Flow: In a debris flow, a block of material moves suddenly along a flat, inclined surface
Types of Mass Movements
Mass MovementsMass Movements
•Mudflows
Flows include: Avalanches Mudflows Landslides
Types of Mass Movements
Mass MovementsMass 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