Earth Sciences 1022A/B Lecture Notes - Lecture 15: Bed Load, Abrasive Blasting, Distributary

• School: Western University
• Department: Earth Sciences
• Course: Earth Sciences 1022A/B
• Professor: Hitchcock

Document Summary

Earth sciences 1022b lecture brief 8 mar 16. Streams erode, transport, and deposit simultaneously over their lengths. Erosion - by abrasion using particles in transport as cutting tools to scour channel walls (like sandblasting) and in circular eddies to cut potholes into the channel floor. Deposition - occurs when stream can no longer carry its load and particles fall to the bed; can form a channel deposit of sand and gravel in bars, or floodplain deposit of mud beyond the channel. Stream valleys: a stream cuts vertically but its banks cave in by mass wasting to develop narrow v-shaped valleys with waterfalls and rapids in rough channels.