Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
19 Cards in this Set
- Front
- Back
|
What are the two factors for movement on a slope? |
Gravity Sheer stress (angle stuff) |
|
|
How does greater weight affect an object on a slope? |
More resistance of movement |
|
|
How does a greater slope affect an object on a slope? |
Less resistance |
|
|
What is the angle of repose? |
How steep something can be angled before falling |
|
|
What is geomorphic threshold? |
The point in which the angle causes an object to move |
|
|
What is mass movement? |
Sediment moved by gravity |
|
|
What are the 5 things that trigger mass movement |
Increase the slope past the angle of repose Adding excess water Adding excess weight Removing vegetation Shocks (earthquakes, sonic booms) |
|
|
How are mass movements classified |
Speed and amount of water |
|
|
A fast mass movement of solid dry rock from a cliff face |
Rockfall |
|
|
A slow moving shift of soil. It can be identified by tree trunks being curved at the bottom |
Creep |
|
|
This type of mass movement involves a block of rock or soil breaking loose and shifts down a distinct surface. It has little water and a medium speed. |
Slide |
|
|
What kind of mass movements are not saturated? |
Slides Slumps Rock fall |
|
|
What kinds of mass movement are saturated? |
Flows |
|
|
What kind of mass movement is the slowest? |
Creep |
|
|
What types of mass movements are free falling and result in Talus slopes? |
Rockfall and avalanche |
|
|
What is a Talus Slope? |
A collection of sediment after a mass movement found at the base of a cliff |
|
|
This type of mass movement has blocks sliding over a curved surface. |
Slump |
|
|
This type of mass movement is liquefied through rain and slides down. It is the most water heavy and fast. |
Earth flow |
|
|
This rockfall had a 162,000 ton block, going 160 mph, falling 2200 ft and covered 50 acres |
Yosemite Rockfall |
