Rocks and Landforms - Gerrard, John

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Sommaire:
1 General background.- Spatial scale.- Rock resistance.- Mechanisms of rock control.- Conclusions.- 2 Rock type and landform assemblages.- Igneous rocks.- Metamorphic rocks.- Sedimentary rocks.- Assessment of landform assemblages.- Spatial distribution of rock types.- Other rock classifications.- Conclusions.- 3 Landscape evolution and rock properties.- Slope angle, form and processes.- Denudation rates.- Slope development on horizontally bedded rocks.- Drainage basin properties.- Bedrock meanders.- Drainage patterns.- Conclusions.- 4 Rock strength and resistance.- Hardness and toughness.- Porosity, permeability and water absorption.- Strength and rock deformation.- Appraisal.- 5 Resistance to weathering.- Chemical weathering.- Chemical weathering of minerals.- Chemical weathering of rocks.- Physical weathering.- Conclusions.- 6 Weathering profiles and landform development.- Weathering front.- Weathering profile differentiation.- Weathering grades.- Weathering depths.- Weathering and the water table.- Spatial patterns of weathering profiles.- Duricrusts.- Weathering profiles and slope form.- Weathering and rock strength.- Weathering and slope instability.- Threshold slopes.- 7 Instability in jointed and fissured rock.- Characteristics of jointed rock.- Unloading joints and rebound phenomena.- Models of jointed rock behaviour.- Rock mass strength classifications.- Strength equilibrium slopes.- Modes of rock failure.- 8 Landforms on granitic rocks.- Inselbergs.- Domed inselbergs (bornhardts).- Tors (boulder inselbergs).- Landscape types.- Conclusions.- 9 Properties and landforms of mudrocks.- Terminology of mudrocks.- Composition of mudrocks.- Consolidation and unloading of mudrocks.- Consistency limits.- Microstructure.- Macrostructure.- Shear strength.- Weathering effects.- Swelling and shrinkage.- Landslides and slope development.- Mudslides.- Sensitive clays.- Conclusions.- 10 A rock-landform synthesis.- Landforms of glacial erosion.- Marine cliffs and shore platforms.- Rocks, landforms and climate.- Conclusions.