SCI TIP Describe the differences of Sand Silt
SCI TIP • Describe the differences of Sand, Silt, & Clay • Which sediment travels by wind furthest? Why? • What is a Loess Deposit? How did it get there?
SCI TIP • • • Describe Glacial EROSION. Describe Glacial DEPOSITION. What is a TOPO MAP? How does it work? List 2 facts about WIND EROSION. What is a MASS MOVEMENT? List and describe 2.
MASS MOVEMENTS • Copper Mine in Utah
MASS MOVEMENTS
MASS MOVEMENT • mass movement, is the geomorphic process by which soil and rock move down slope under the force of gravity.
• When the gravitational force acting on a slope exceeds its resisting force, slope failure (mass wasting) occurs. – Can be FAST or slow
Triggers of Mass Movements • • Rain Spring Thaws Volcanic Eruptions Earthquakes – MOST COMMON?
Rockfall/Slide • Fall of rock from steep cliff. – Most rapid kind of mass movement) – Sediment ranges in size from small fragments to large BOULDERS.
Landslide • Sudden movement of masses of loose rock and soil down the slope of a hill, mountain, or cliff.
Mudflow/Lahar • Rapid movement of large masses of mud. – Lahar: volcanic eruption involved. • Occur in dry/Mountainous regions that receive large amounts of rainfall in a short period of time.
MUDFLOW/LAHAR
Slump • Sliding of one large piece of soil down a hillside.
Creep • Slow downhill movement of weathered rock material.
Creep
Some visible effects of creep
CREEP
CREEP
Solifluction • Slow down-hill flow of wet, muddy topsoil over frozen clay-rich subsoil.
Solifluction (soil flow)
Understanding Bedrock is Important? ?
Why is it important to understand the bedrock?
- Slides: 55
