Hydrology NOTES page 8 Erosion ©Mark Place, 2007-2008 www.LearnEarthScience.com

the movement of weathered material EROSION the movement of weathered material

the movement of weathered material EROSION the movement of weathered material

Greatest FORCE Greatest AGENT gravity water

carving out V-shaped valleys? What agent of erosion is responsible for carving out V-shaped valleys? r i V e r s Figure 11.10 A steep mountain stream eroded a V-shaped valley into soft shale in the Canadian Rockies. running water

carving out U-shaped valleys? What agent of erosion is responsible for carving out U-shaped valleys? glaciers

Slope

Erosion rate versus slope Olympic Mountains

Discharge the amount of water

Rate of Erosion Stream Discharge

Meandering Streams

Where is erosion greatest? Outside of Curve - Cut Bank

Where does the river flow fastest? A-A' = Center just below the surface B-B' and C-C' = outside of curve

Oxbow Lakes New Mexico DEMO

What page can this graph be found in the ESRTS? Page 6

What’s the minimum speed water needs to be moving in order to transport sand? 0.4 cm/sec

In order to move a particle that is 7.0 cm, a stream’s velocity would need to be at least _______ cm/sec. 200 cm/sec

Wind Erosion desert wind erosion pitted

How sand dunes form