Classroom presentations to accompany Understanding Earth, 3rd edition prepared by Peter Copeland and William Dupré University of Houston Chapter 11 Mass Wasting

Influences on mass movement Nature of slope materialsNature of slope materials Amount of waterAmount of water Angle of slopeAngle of slope

Classification of Mass Movements: Table 11.2

Fig. 11.1a Angle of Repose- Effect of Grain Size

Fig. 11.1b Angle of Repose- Effect of Moisture Content

Surface Tension Fig. 11.2

Fig UnsaturatedSoil SaturatedSoil

Fig How do they do that? Kelly Mooney Photography/Corbis

Fig Fire increases the susceptibility for erosion and mass movement Grant Meyer

Weathered Shale Fig Martin Miller

Landslide Induced by Poor Construction Techniques

Fig. 11.7

Landslide Near Anchorage, Alaska, Caused by the 1964 Earthquake Fig. 11.7

Factors that Influence Mass Movements: Table 11.1

Classification of mass movements RockfallRockfall RockslideRockslide Rock avalancheRock avalanche CreepCreep EarthflowEarthflow Debris flowDebris flow MudflowMudflow Debris avalancheDebris avalanche SlumpSlump Debris slideDebris slide SolifluctionSolifluction

Rockfalls E.R. Degginger Fig. 11.8

Rockslide Fig Jeff Foott/DRK

Rock avalanche Brian Vikander/Corbis Fig

Soil Creep Fig

Soil Creep

Fig Earthflow Steve McCutcheon/Visuals Unlimited

Debris flow Fig E. R. Degginger

Mudflow Fig Vlastimir Shone/Gamma

Debris avalanche Fig Russ Davies/The Image Bank

Slump E. R. Degginger Fig

Debris slide Michael Collier Fig

Solifluction Fig

Solifluction Fig Fletcher & Baylis

Gros Ventre Landslide A.J. Copley/Visuals Unlimited

Causes of slides Heavy rain or snowfallHeavy rain or snowfall ExcavationExcavation EarthquakesEarthquakes

Fig Gros Ventre Slide

Evolution of River Valley Dammed by Landslide Fig a Before Slide

Evolution of River Valley Dammed by Landslide Fig b After Slide

Evolution of River Valley Dammed by Landslide Fig c After Dam is Breached

Vaiont Dam Reservoir Landslide Fig