GGR112H5 Lecture Notes - Lecture 13: Permafrost, Solifluction, Downhill Creep
Document Summary
Illustrate the forces at work on materials residing on a slope: slopes are shaped by the relation between rate of weathering and breakup of slope materials and the rate of mass movement and erosion of those materials. In this struggle against gravity, a slope energy overcomes resistant against movement. against movement. Slopes seek an angle of equilibrium among the operating forces. Define weathering, and explain the important of parent rock, and of joints and fractures in rock: weathering processes disintegrate both surface and subsurface rocks into mineral particles or dissolve them in water. Weathering processes may be physical or chemical: the upper layers of surface material undergo continual weathering and create broken-up rock called regolith. Weathered bedrock is the parent rock from which regolith forms. The small unconsolidated, fragmented material that develops after weathering is sediment, which along with weathered rock forms the parent material from which soil evolves: factors influencing weathering processes:
