RAPID MASS MOVEMENT

INTRODUCTION TO RAPID MASS MOVEMENT

• Most destructive mass movements
• They happen suddenly
• They destroy everything in their path

ROCK FALLS

• Rock fall- a group of loose rocks that fall down a steep slope
• They range from small rock to large boulders

Landslides
🔹Landslide- The sudden movement of rock and soil down a slope
🔸Slump- It occurs when material moves down slope over a curved surface.
🔹Most common type of landslides.

INCREASING THE CHANCES OF LANDSLIDES

• Hevy rains
• Deforestation
• Construction on unstable slopes
• Earthquakes

Mudflow
Mudflow- A flow of mud or rock and soil mixed with a lot of water
-This can occur from
🔷 Drought followed by a large rainstorm
🔷 Deforestation
🔷 Removal of ground

LAHARS

• Lahars- mudflows of volcanic orgin
• Formed when volcanic eruptions quickly melt ice and snow
• They can travle up to 80 km/h