EAS205 Study Guide - Midterm Guide: Pore Water Pressure, Weathering, Clay Minerals

• School: University of Alberta
• Department: Earth and Atmospheric Sciences
• Course: EAS205
• Professor: Fred Clark

Document Summary

Free-falling; material not always in contact with the ground (commonly rock falls) Rocks tensile strength is exceeded (by frost wedging) Forward rotational movement of mass of rock/earth/debris. Tensile strength is exceeded and mass is divided into talus cones. Cohesive unit of rock/soil slips downward along a clearly defined surface. Translational slide: mass moves along surface of weakness. Rotational slump: failure surface is curved, deep blocks of failed materials rotates as it falls. Landslides involving movement of material down a slope (avalanches=high speed) Mass cohesive, intact or broken into large blocks on shear zone of flowing material. Overlying rigid layer is broken into blocks that pitch/roll. When slope angle increases, the driving forces go up, and the resisting forces go down. The coefficient of friction stays the same, but effective normal stress goes down. Consolidated material: shear strength of materials resists mass movement.