Chapter 13 Weathering, Karst Landscapes, and Mass Movement Geosystems 6e An Introduction to Physical...
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Transcript of Chapter 13 Weathering, Karst Landscapes, and Mass Movement Geosystems 6e An Introduction to Physical...
Chapter 13Weathering, Karst
Landscapes, and Mass Movement
Geosystems 6eAn Introduction to Physical Geography
Robert W. ChristophersonCharles E. Thomsen
Weathering, Karst Landscapes, and Mass Movement
Landmass DenudationGeomorphology – the science of landformsDenudation – a process that erodes or rearranges landforms
Weathering Processes Karst Topography and Landscapes
Limestone
Mass Movement Processes
Landmass Denudation Geomorphic Models of Landform Development
Also called Erosion CycleStart with uplifted surfaceWater erosion cuts into the surface and transports materials elsewhereRidges and valleys are formedSurface eventually becomes rounded
Dynamic Equilibrium View of Landforms Emphasizes the balance among force, form, and processEvery landscape is unique
Dynamic Equilibrium
Slope Mechanics and Form
Figure 13.3
Slope Mechanics and Form
Figure 13.3
Weathering Processes Either disintegrate rock into mineral particles or dissolve them in water
Physical Weathering ProcessesWhen rock is broken and disintegrated without any chemical alteration
Chemical Weathering Processes The actual decomposition or chemical change of mineral in rock
Regolith, Soil, and Parent Materials
Figure 13.5
Joint-block Separation
Figure 13.8
Talus Slope
Figure 13.8
Exfoliation in Granite
Figure 13.11
Exfoliation in Granite
Figure 13.11
Chemical Weathering
Figure 13.12
Spheroidal Weathering
Figure 13.12
Karst Topography and Landscapes Karst - landscape of limestone with poor drainage that appears pitted and bumpySinkholes Caves and Caverns
Karst and Limestone Regions
Figure 13.14
Sinkholes
Figure 13.16 Figure 13.18
Tower Karst
Figure 13.19
Cavern Features
Figure 13.20
Mass Movement Processes Mass Movement – any unit movement of a body of material, propelled and controlled by gravity Classes of Mass Movements
Fall, slide, flow, or creep
Human-Induced Mass Movements (Scarification) Mines, roads, development, mountain-top removal
Madison River Landslide
Figure 13.21
Mass Movement Classes
Figure 13.22
Rockfall
Figure 13.9
Debris Avalanche
Figure 13.25
Soil Creep
Figure 13.27
Scarification
Figure 13.28
End of Chapter 13
Geosystems 6eAn Introduction to Physical Geography
Robert W. ChristophersonCharles E. Thomsen