Tectonic Geomorphology of Mountains: A New Approach to Paleoseismology
By: William B. Bull (author)Hardback
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With a balance of theory and practical applications, Tectonic Geomorphology of Mountains is essential reading for research geologists and upper-level undergraduate and graduate students in the earth sciences. * This book describes how tectonic events influence geomorphic processes and explores how landscapes respond to tectonic deformation in the ways in which they are weathered, washed, and abraded * Uses new approaches to enhance theoretical models of landscape evolution and to solve practical problems such as the assessment of earthquake hazards * Includes previously unpublished research and theory * Examines how to use key landforms as reference levels in changing landscapes, estimate rates of mountain-range uplift, and map seismic shaking caused by prehistorical earthquakes * Presents a diverse range of examples from around the world
William B. Bull is an applied geologist educated at Colorado and Stanford Universities. He worked 12 years for the US Geological Survey as an engineering geologist and groundwater hydrologist. Studies of collapsing soils and land subsidence were quite appealing, but he changed career goals by moving to the University of Arizona where he taught geomorphology for 28 years. He continues to study landscapes of rising mountains from the perspective of earthquake hazards.
Preface. 1 Scrunch and Stretch Bedrock Uplift. 1.1 Introduction. 1.2 Pure Uplift, Stretch and Scrunch Bedrock Uplift. 1.2.1 Isostatic and Tectonic Uplift. 1.2.2 Stretch and Scrunch Tectonics. 1.3 Landscape Responses to Regional Uplift. 2 Concepts for Studies of Rising Mountains. 2.1 Themes and Topics. 2.2 The Fundamental Control of Base Level. 2.2.1 Base Level. 2.2.2 Base Level Change. 2.2.3 The Base Level of Erosion. 2.2.4 The Changing Level of the Sea. 2.2.5 Spatial Decay of the Effects of Local Base Level Changes. 2.3 Threshold of Critical Power in Streams. 2.3.1 Relative Strengths of Stream Power and Resisting Power. 2.3.2 Threshold-Intersection Points. 2.4 Equilibrium in Streams. 2.4.1 Classification of Stream Terraces. 2.4.2 Feedback Mechanisms. 2.4.3 Dynamic and Static Equilibrium. 2.5 Time Lags of Response. 2.5.1 Responses to Pulses of Uplift. 2.5.2 Perturbations that Limit Continuity of Fluvial Systems. 2.5.3 Lithologic and Climatic Controls of Relaxation Times. 2.5.4 Time Spans Needed to Erode Landforms. 2.6 Tectonically-Induced Downcutting. 2.6.1 Straths, Stream-Gradient Indices, and Strath Terraces. 2.6.2 Modulation of Stream-Terrace Formation by Climatic Changes. 2.7 Nontectonic Base-Level Fall and Strath Terrace Formation. 2.8 Hydraulic Coordinates. 3 Mountain Fronts. 3.1 Introduction. 3.2 Tectonically Active Escarpments. 3.2.1 Faceted Spur Ridges. 3.2.2 Mountain-Piedmont Junctions. 3.2.3 Piedmont Forelands. 3.3 Fault Segmentation of Mountain Fronts. 3.3.1 Different Ways to Study Active Faults. 3.3.2 Segmentation Concepts and Classification. 3.3.3 Fault-Segment Boundaries. 3.3.4 Normal Fault Surface Ruptures. 3.3.5 Strike-Slip Fault Surface Ruptures. 3.4 Summary. 4 Tectonic Activity Classes of Mountain Fronts. 4.1 Tectonic Setting of the North America-Pacific Plate Boundary. 4.2 Appraisal of Regional Mountain Front Tectonic Activity. 4.2.1 Geomorphic Tools For Describing Relative Uplift Rates. 22.214.171.124 Mountain-Front Sinuosity. 126.96.36.199 Widths of Valleys. 188.8.131.52 Triangular Facets. 4.2.2 Diagnostic Landscape Classes of Relative Tectonic Activity. 4.2.3 Regional Assessments of Relative Tectonic Activity. 184.108.40.206 Response Time Complications and Strike-Slip Faulting. 220.127.116.11 Maps of Relative Uplift. 4.3 Summary. 5 Fault Scarps. 5.1 General Features. 5.2 Scarp Morphology Changes with Time. 5.2.1 Changes in Scarp Height. 5.2.2 Decreases in Maximum Scarp Slope. 5.2.3 Diffusion-Equation Modeling. 5.3 Climatic Controls of Fault-Scarp Morphology. 5.4 Lithologic Controls of Fault-Scarp Morphology. 5.4.1 Fault Rupture of Different Materials. 5.4.2 Lithologic Controls on an 1887 Fault Scarp. 18.104.22.168 Geomorphic Processes. 22.214.171.124 Scarp Materials. 126.96.36.199 Scarp Morphology. 5.5 Laser Swath Digital Elevation Models. 5.6 Dating Fault Scarps with Terrestrial Cosmogenic Nuclides. 5.6.1 Alluvium. 5.6.2 Bedrock. 5.7 Summary. 6 Analyses of Prehistoric Seismic Shaking. 6.1 Paleoseismology Goals. 6.2 Earthquake-Generated Regional Rockfall Events. 6.2.1 New Zealand Earthquakes. 188.8.131.52 Tectonic Setting. 184.108.40.206 Background and Procedures. 220.127.116.11 Diagnostic Lichen-Size Peaks. 18.104.22.168 Tree-Ring Analyses. 22.214.171.124 Alpine Fault Earthquakes. 126.96.36.199 Recent Marlborough Earthquakes. 6.2.2 California Earthquakes. 188.8.131.52 Calibration of Lichen Growth Rates. 184.108.40.206 Recent Cliff Collapse. 220.127.116.11 Rockfall Processes in Glaciated Valleys. 18.104.22.168 San Andreas Fault Earthquakes. 22.214.171.124 Lichenometry and Precise Radiocarbon Dating Methods. 6.3 Summary. References Cited. Index
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