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  • 1
    Keywords: Forschungsbericht ; Schlammvulkan
    Type of Medium: Online Resource
    Pages: 1 Online-Ressource
    Series Statement: Berichte aus dem MARUM und dem Fachbereich Geowissenschaften der Universität Bremen No. 318
    DDC: 550
    Language: English
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  • 2
    Online Resource
    Online Resource
    Cham :Springer International Publishing AG,
    Keywords: Mass-wasting. ; Electronic books.
    Description / Table of Contents: This book covers the geological, geophysical, engineering and environmental aspects of submarine slope failures. It focuses on understanding the full spectrum of challenges presented by this major coastal and offshore geohazard.
    Type of Medium: Online Resource
    Pages: 1 online resource (664 pages)
    Edition: 1st ed.
    ISBN: 9783319009728
    Series Statement: Advances in Natural and Technological Hazards Research Series ; v.37
    DDC: 551.468
    Language: English
    Note: Intro -- Preface -- Contents -- Part I Physical Properties of Sediments -- Chapter 1: Weak Layers: Their Definition and Classification from a Geotechnical Perspective -- 1.1 Introduction -- 1.2 Weak Layer Definition -- 1.3 Weak Layer Observations -- 1.4 Classification System from a Geotechnical Approach -- 1.5 Concluding Remarks -- References -- Chapter 2: Field Measurements to Investigate Submerged Slope Failures -- 2.1 Introduction -- 2.2 Interpretation Methods of Field Measurements -- 2.2.1 Relative Density -- 2.2.2 State Parameter -- 2.3 Application on Test Locations -- 2.4 Discussion -- 2.5 Conclusions and Recommendations -- References -- Chapter 3: Elemental Distribution and Microfabric Characterization Across a Buried Slump Scar: New Insights on the Long-Term Development and Reactivation of Scar Surfaces from a Microscopic Perspective -- 3.1 Introduction -- 3.2 Geological Setting -- 3.3 Investigation of Remineralization at the Unconformity -- 3.3.1 X-ray Computed Tomography (X-CT) -- 3.3.2 X-ray Fluorescence Spectroscopy (XRF) -- 3.3.3 Scanning Electron Microscopy (SEM) and Energy Dispersive X-ray Analysis (EDX) -- 3.4 Discussion and Conclusion -- References -- Chapter 4: Evidence for Mass Transport Deposits at the IODP JFAST-Site in the Japan Trench -- 4.1 Introduction -- 4.2 Background and Geological Setting -- 4.3 Material and Methods -- 4.3.1 Bathymetric Mapping -- 4.3.2 Sediment Core -- 4.3.2.1 Physical Properties -- 4.3.2.2 Pore-Water Analyses -- 4.4 Results -- 4.5 Discussion -- 4.5.1 Evidencing Mass Transport Deposits at the JFAST-Site -- 4.5.2 Estimating the Age of the MTD Formation -- 4.6 Conclusions -- References -- Chapter 5: Preliminary Investigations of Rheological Properties of Busan Clays and Possible Implications for DebrisFlow Modelling -- 5.1 Introduction -- 5.2 Materials and Methods -- 5.3 Results. , 5.3.1 Rheological Behaviour of the Busan Clays -- 5.4 Discussion -- 5.5 Conclusions -- References -- Chapter 6: Utilizing Cone Penetration Tests for Landslide Evaluation -- 6.1 Introduction -- 6.2 Site Characterization -- 6.3 Methods -- 6.3.1 In-Situ CPT Measurements -- 6.3.2 Physical and Mechanical Properties -- 6.4 Results and Discussion -- 6.4.1 Static CPT -- 6.4.2 Vibratory CPT -- 6.4.3 Dissipation Test -- 6.4.4 Liquefaction Analysis with CLiq Software -- 6.5 Summary and Conclusion -- References -- Chapter 7: Geomechanical Characterization of Submarine Volcano-Flank Sediments, Martinique, Lesser Antilles Arc -- 7.1 Introduction -- 7.2 Geomechanical Characterization -- 7.3 Results -- 7.3.1 Summary of Hole Stratigraphy -- 7.3.2 Consolidation State -- 7.3.3 Hydraulic Conductivity -- 7.4 Discussion and Conclusion -- References -- Part II Gas Hydrates and Role of Interstitial Fluids in Submarine Slope Failure -- Chapter 8: Interrelationship Between Sediment Fabric, Pore Volume Variations as Indicator for Pore Pressure Changes, and Sediment Shear Strength -- 8.1 Introduction -- 8.2 Method -- 8.3 Results -- 8.4 Discussion -- 8.4.1 Interplay: Sediment Strength and Pore Volume Changes -- 8.4.1.1 Effect of Grain Shape Complexity -- 8.4.2 Local Pore Volume Changes -- 8.5 Conclusions -- References -- Chapter 9: Slope Instability of Glaciated Continental Margins: Constraints from Permeability-Compressibility Tests and Hydrogeological Modeling Off Storfjorden, NW Barents Sea -- 9.1 Introduction -- 9.2 Data and Methods -- 9.3 Results -- 9.4 Discussion -- 9.5 Conclusions -- References -- Chapter 10: Baiyun Slide and Its Relation to Fluid Migration in the Northern Slope of Southern China Sea -- 10.1 Introduction -- 10.2 Geological Setting -- 10.3 Data and Methods -- 10.4 Results -- 10.4.1 Morphology and Distribution of Baiyun Slide. , 10.4.2 Seismic Indications of Gas and Fluid Migration -- 10.4.2.1 Active Faults Related to Gas and Fluid Migration -- 10.4.2.2 Gas Chimneys -- 10.5 Discussion -- 10.5.1 Relationship Between Fluid Migration and Slope Stability -- 10.5.2 Possible Trigger Mechanisms -- 10.6 Conclusions -- References -- Chapter 11: Post-failure Processes on the Continental Slope of the Central Nile Deep-Sea Fan: Interactions Between Fluid Seepage, Sediment Deformation and Sediment-Wave Construction -- 11.1 Introduction -- 11.2 Methods -- 11.3 Results -- 11.3.1 Architecture and Age of MTDs and Slope Deposits -- 11.3.2 Seabed Sediment Undulations -- 11.3.3 Sediment Pathways -- 11.4 Discussion -- 11.4.1 End-Members: Sediment Waves Versus Deformation Structures -- 11.4.2 Post-failure Slope Evolution -- 11.5 Conclusion -- References -- Chapter 12: Fluid Seepage in Relation to Seabed Deformation on the Central Nile Deep-Sea Fan, Part 1: Evidence from Sidescan Sonar Data -- 12.1 Introduction -- 12.2 Methods -- 12.3 Results -- 12.3.1 Erosional Furrows -- 12.3.2 Sediment Cracks -- 12.3.3 Carbonate Pavements -- 12.3.4 Hydroacoustic Flares -- 12.4 Discussion -- 12.4.1 Mid-slope Domain: Focused Fluid Flow Through MTDs -- 12.4.2 Western Undulations: Fluid Flow Along Faults Rooted in MTDs -- 12.4.3 Eastern Undulations: Exhumation of Fossil Carbonates -- 12.5 Conclusions -- References -- Chapter 13: Fluid Seepage in Relation to Seabed Deformation on the Central Nile Deep-Sea Fan, Part 2: Evidence from Multibeam and Sidescan Imagery -- 13.1 Introduction -- 13.2 Methods -- 13.3 Results -- 13.3.1 Faults and Fluid Indicators on Sub-bottom Profiles -- 13.3.2 Seabed Backscatter Anomalies at Differing Frequencies -- 13.3.3 Water Column Gas Flares -- 13.4 Discussion -- 13.4.1 Growth and Burial of Carbonate Pavements -- 13.4.2 Fluid Migration Along Fault Planes -- 13.5 Conclusions -- References. , Part III Slope Stability and Risk Assessment -- Chapter 14: Advances in Offshore Seismic Slope Stability: A Case History -- 14.1 Introduction -- 14.2 Geomorphological and Geotechnical Data -- 14.2.1 Site Investigations -- 14.2.2 Geomorphological Setting -- 14.2.3 Geotechnical and Geophysical Data Integration -- 14.2.4 Soil Sampling -- 14.2.5 Advanced Laboratory Testing -- 14.3 Stability Analyses -- 14.3.1 Conventional Approach -- 14.3.2 Dynamic Approach -- 14.4 Conclusions -- References -- Chapter 15: Size-Frequency Relationship of Submarine Landslides at Convergent Plate Margins: Implications for Hazard and Risk Assessment -- 15.1 Introduction -- 15.2 Tectonic Setting of the MA and CC Convergent Margins -- 15.3 MA and CC Slumps and Slides: Observations and Data -- 15.4 Size-Frequency Relationships -- 15.5 Discussion and Conclusion -- References -- Chapter 16: A Numerical Investigation of Sediment Destructuring as a Potential Globally Widespread Trigger for Large Submarine Landslides on Low Gradients -- 16.1 Introduction -- 16.1.1 Destructuring of Cemented Hemipelagic Clay as a Source of Overpressure -- 16.1.2 Aims and Approach -- 16.2 Methodology -- 16.2.1 Material Model -- 16.2.2 Model Description -- 16.2.3 Assumptions and Limitations -- 16.3 Results -- 16.4 Discussion -- 16.5 Conclusion -- References -- Chapter 17: How Stable Is the Nice Slope? - An Analysis Based on Strength and Cohesion from Ring Shear Experiments -- 17.1 Introduction and Geological Setting -- 17.2 Methods -- 17.2.1 Coring and Sedimentological Analysis -- 17.2.2 Shear Experiments with the Ring Shear Apparatus -- 17.2.3 Stability Assessment of the Nice Slope Sediments -- 17.3 Results -- 17.3.1 Sedimentological Analysis and Physical Properties -- 17.3.2 Frictional Behavior of the Nice Slope Sediments -- 17.3.3 Stability Assessment of the Nice Slope Sediments -- 17.4 Discussion. , References -- Chapter 18: Regional Slope Stability Assessment Along the Caucasian Shelf of the Black Sea -- 18.1 Introduction -- 18.2 Geological Engineering Conditions Along the Caucasian Shelf of the Black Sea -- 18.3 Methods -- 18.4 Regional Submarine Slope Stability Assessment Based on 1D Modelling -- 18.5 Local Submarine Slope Stability Assessment Based on 1D Modelling -- 18.5.1 Dzhubga -- 18.5.2 Novomikhailovsky -- 18.5.3 Tuapse -- 18.5.4 Ashe -- 18.5.5 Shahe -- 18.5.6 Dagomis -- 18.5.7 Kudepsta -- 18.6 Discussion and Conclusion -- References -- Chapter 19: A Semi-empirical Method to Assess Flow-Slide Probability -- 19.1 Introduction -- 19.2 Failure Mechanisms -- 19.2.1 Static Liquefaction -- 19.2.2 Breach Flow-Slide -- 19.3 Physical-Based Models -- 19.3.1 Static Liquefaction -- 19.3.2 Breach Flow-Slide -- 19.3.3 Applicability of Physical-Based Models -- 19.4 Empirical Method -- 19.4.1 Basic Information and Mean Flow-Slide Frequency -- 19.4.2 General Applicability to Other Regions in the Netherlands -- 19.4.3 Influence of Local Soil Characteristics and Slope Geometry -- 19.5 Semi-empirical Method -- 19.5.1 Determination of P(ZVliquefaction) -- 19.5.2 Determination of P(ZVbreachflow) -- 19.6 Concluding Remarks -- References -- Chapter 20: Submarine Slope Stability Assessment of the Central Mediterranean Continental Margin: The Gela Basin -- 20.1 Introduction -- 20.2 Geological Setting -- 20.3 Material and Methods -- 20.3.1 Shipboard and Laboratory Analysis -- 20.3.2 Overpressure Estimation -- 20.3.3 Slope Stability Analysis -- 20.4 Results -- 20.4.1 Physical and Geotechnical Properties -- 20.4.2 Slope Stability Analysis -- 20.5 Discussion -- 20.5.1 Preconditioning Factors -- 20.5.2 Triggering Factors -- 20.6 Conclusions -- References -- Part IV Monitoring, Observation and Repeated Surveys of Active Slope Failure Processes. , Chapter 21: The 1930 Landslide in Orkdalsfjorden: Morphology and Failure Mechanism.
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  • 3
    Online Resource
    Online Resource
    Dordrecht :Springer Netherlands,
    Keywords: Mass-wasting -- Congresses. ; Electronic books.
    Description / Table of Contents: Submarine mass movements represent major offshore geohazards due to their destructive, tsunami-generating potential; dangers that will only increase as sea levels rise. This volume features the latest scientific research into their features and consequences.
    Type of Medium: Online Resource
    Pages: 1 online resource (763 pages)
    Edition: 1st ed.
    ISBN: 9789400721623
    Series Statement: Advances in Natural and Technological Hazards Research Series ; v.31
    Language: English
    Note: Intro -- Submarine Mass Movements and Their Consequences -- Contents -- Contributors -- Chapter 1: Submarine Mass Movements and Their Consequences -- 1.1 Introduction -- 1.2 Part I: Physical Properties of Sediments and Slope Stability Assessment -- 1.3 Part II: Seafloor Geomorphology for Trigger Mechanisms and Landslide Dynamics -- 1.4 Part III: Role of Fluid Flow in Slope Instability -- 1.5 Part IV: Mechanics of Mass-Wasting in Subduction Margins -- 1.6 Part V: Post-failure Dynamics -- 1.7 Part VI: Landslide Generated Tsunamis -- 1.8 Part VII: Witnessing and Quasi-Witnessing of Slope Failures -- 1.9 Part VIII: Architecture of Mass Transport Deposits/Complexes -- 1.10 Part IX: Relevance of Natural Climate Change in Triggering Slope Failures -- 1.11 Future Perspectives -- References -- Part I: Physical Properties of Sediments and Slope Stability Assessment -- Chapter 2: Risk Assessment for Earthquake-Induced Submarine Slides -- 2.1 Introduction -- 2.2 Stability of Submarine Slopes Under Earthquake Loading -- 2.3 Factors Influencing Soil Strength Under Seismic Loading -- 2.3.1 Rapid Loss of Shear Strength and Liquefaction Phenomenon -- 2.3.2 Special Considerations for Clay Slopes Under Earthquake Loading -- 2.3.3 Effect of High-Frequency Cyclic Loading on Static Shear Strength -- 2.3.4 Effect of Cyclic Loading on Undrained Creep -- 2.4 Risk Assessment for Submarine Slides -- 2.4.1 Probabilistic Slope Stability Assessment -- 2.4.2 Estimation of Annual Probability of Slope Failure -- 2.4.3 Interpretation of Computed Static Failure Probability in a Bayesian Framework -- 2.5 Recommended Calculation Procedure -- 2.6 Discussion and Conclusion -- References -- Chapter 3: Shallow Landslides and Their Dynamics in Coastal and Deepwater Environments, Norway -- 3.1 Introduction -- 3.2 Geological Setting -- 3.3 Data and Methods. , 3.4 Results - From Geomorphology to Soil Properties and Stability -- 3.4.1 Coastal Environment - Sørfjorden (Finneidfjord) -- 3.4.2 Intermediate Water Depths - Vesterålen Margin -- 3.4.3 Deepwater Setting - Lofoten Margin -- 3.5 Discussion and Conclusions -- References -- Chapter 4: Physical Properties and Age of Continental Slope Sediments Dredged from the Eastern Australian Continental Margin - Implications for Timing of Slope Failure -- 4.1 Introduction -- 4.2 Study Area -- 4.3 Results -- 4.3.1 Dredged Materials - Sedimentology and Geomechanical Properties -- 4.3.2 Palaeontology/Dating -- 4.3.3 Geomechanical Modeling -- 4.4 Discussion and a Hypothesis -- References -- Chapter 5: Submarine Landslides on the Upper Southeast Australian Passive Continental Margin - Preliminary Findings -- 5.1 Introduction -- 5.1.1 Study Area -- 5.2 Data and Methods -- 5.2.1 Bathymetry and Slide Geometry -- 5.2.2 Sediment Properties -- 5.3 Results and Interpretation -- 5.3.1 Sediment Properties -- 5.3.2 14 C Radiocarbon Ages -- 5.4 Modeling -- 5.5 Conclusions -- References -- Chapter 6: Development and Potential Triggering Mechanisms for a Large Holocene Landslide in the Lower St. Lawrence Estuary -- 6.1 Introduction -- 6.1.1 Objectives -- 6.2 Data and Methods -- 6.3 Morphology of the Betsiamites Slide Complex -- 6.4 Lithostratigraphy and Failure Surface -- 6.5 Movement Development -- 6.6 Triggering Mechanisms -- 6.7 Concluding Remarks and Future Work -- References -- Chapter 7: Spatially Fixed Initial Break Point and Fault-Rock Development in a Landslide Area -- 7.1 Introduction -- 7.2 Setting -- 7.3 Methods -- 7.3.1 Tilt and Groundwater Level Measurement -- 7.3.2 Core Analysis -- 7.3.3 Detailed Monitoring During Slipa -- 7.4 Results -- 7.4.1 Dilation and Slip -- 7.4.2 Core Analysis -- 7.5 Summary -- References. , Chapter 8: Pore Water Geochemistry as a Tool for Identifying and Dating Recent Mass-Transport Deposits -- 8.1 Introduction -- 8.2 Study Area -- 8.3 Material and Methods -- 8.4 Results and Discussion -- 8.4.1 Pore Water Profiles at Potential MTD Sites -- 8.4.2 Geochemical Transport/Reaction Modeling -- 8.5 Conclusions -- References -- Chapter 9: An In-Situ Free-Fall Piezocone Penetrometer for Characterizing Soft and Sensitive Clays at Finneidfjord (Northern Norway) -- 9.1 Introduction -- 9.2 Setting -- 9.3 Material and Methods -- 9.4 Results -- 9.4.1 Comparison of FF-CPTU and Pushed CPTU Tests -- 9.4.2 Laboratory Analyses -- 9.4.3 Comparison of In-Situ and Laboratory Results -- 9.5 Discussion and Conclusion -- References -- Chapter 10: Static and Cyclic Shear Strength of Cohesive and Non-cohesive Sediments -- 10.1 Introduction -- 10.2 Methods -- 10.2.1 Research Approach -- 10.2.2 Sample Description -- 10.2.3 Testing Procedure -- 10.2.4 Data Acquisition and Analysis -- 10.3 Results and Discussion -- 10.3.1 Exemplary Cyclic Test Results -- 10.3.2 Generic Study -- 10.3.3 Case Study -- 10.4 Conclusion -- References -- Chapter 11: Upstream Migration of Knickpoints: Geotechnical Considerations -- 11.1 Introduction -- 11.2 Experimental Setup and Method -- 11.3 Results -- 11.4 Discussion -- 11.5 Conclusion -- References -- Part II: Seafloor Geomorphology for Trigger Mechanisms and Landslide Dynamics -- Chapter 12: A Reevaluation of the Munson-Nygren-Retriever Submarine Landslide Complex, Georges Bank Lower Slope, Western North Atlantic -- 12.1 Introduction -- 12.1.1 Data -- 12.2 Results and Interpretations -- 12.2.1 Munson-Nygren Slide -- 12.2.2 Retriever Slide -- 12.2.3 Picket Slide -- 12.3 Age of Slope Failure -- References -- Chapter 13: Submarine Landslides in Arctic Sedimentation: Canada Basin -- 13.1 Introduction -- 13.1.1 Regional Geology. , 13.1.2 Methods -- 13.2 Results -- 13.2.1 Canadian Archipelago Slope and Rise -- 13.2.2 MacKenzie-Beaufort Slope and Rise -- 13.3 Discussion and Conclusions -- References -- Chapter 14: Extensive Erosion of the Deep Seafloor - Implications for the Behavior of Flows Resulting from Continental Slope Instability -- 14.1 Introduction -- 14.2 Areas of Erosion by Gravity Currents -- 14.3 Areas of Deposition from Gravity Currents -- 14.4 Discussion -- 14.5 Conclusions -- References -- Chapter 15: Investigations of Slides at the Upper Continental Slope Off Vesterålen, North Norway -- 15.1 Introduction -- 15.2 Database -- 15.3 Landforms and Geological Setting -- 15.4 Results -- 15.4.1 Morphological Features -- 15.4.2 Seismic Stratigraphy, Slides and Failure Planes -- 15.4.3 X-Ray Images, Core Logging and Soil Mechanical Testing -- 15.5 Discussion -- 15.6 Summary and Conclusions -- References -- Chapter 16: Dakar Slide Offshore Senegal, NW-Africa: Interaction of Stacked Giant Mass Wasting Events and Canyon Evolution -- 16.1 Introduction -- 16.1.1 Structural Setting -- 16.1.2 Data -- 16.2 Results -- 16.2.1 Seismic Units and Stratigraphy -- 16.2.2 Dakar Slide -- 16.2.3 Older MTDs -- 16.2.4 Dakar Canyon -- 16.2.5 Sedimentary Ridges -- 16.3 Discussion -- 16.3.1 Dakar Slide: Age and Type of Failure -- 16.3.2 History of Mass Wasting Off Southern Senegal -- 16.3.3 Interaction Between Slope Failures and Canyons -- 16.4 Conclusion -- References -- Chapter 17: Large-Scale Mass Wasting on the Northwest African Continental Margin: Some General Implications for Mass Wasting on Passive Continental Margins -- 17.1 Introduction -- 17.2 Results and Interpretations -- 17.2.1 Sahara Slide -- 17.2.2 Cap Blanc Slide -- 17.2.3 Mauritania Slide Complex -- 17.2.4 Dakar Slide -- 17.3 Discussion -- 17.3.1 Mass Wasting Off Northwest Africa: Where and Why?. , 17.3.2 Timing of Landslides and Geohazard Potential -- 17.4 Conclusions -- References -- Chapter 18: Deep-Seated Bedrock Landslides and Submarine Canyon Evolution in an Active Tectonic Margin: Cook Strait, New Zealand -- 18.1 Introduction -- 18.2 Data Sets and Methodology -- 18.3 Results -- 18.3.1 Submarine Canyon Morphology -- 18.3.2 Landslides -- 18.3.2.1 Morphological Characteristics -- 18.3.2.2 Distribution -- 18.4 Discussion and Conclusions -- 18.4.1 Nature of Landslides -- 18.4.2 Causes of Landslides -- 18.4.3 Spatial Distribution of Landslides -- 18.4.4 Role of Landslides in Canyon Evolution -- References -- Chapter 19: Polyphase Emplacement of a 30 km 3 Blocky Debris Avalanche and Its Role in Slope-Gully Development -- 19.1 Introduction -- 19.2 Tectonic and Sedimentary Setting -- 19.3 Data and Methods -- 19.4 Stratigraphic and Morphological Analyses -- 19.5 PDA Emplacement and Upper Slope Gully Development -- 19.6 Summary -- References -- Chapter 20: Slope Failure and Canyon Development Along the Northern South China Sea Margin -- 20.1 Introduction -- 20.2 Regional Setting -- 20.3 Data and Methods -- 20.4 Results -- 20.4.1 Canyon Morphology -- 20.4.2 Slope Failure Features -- 20.5 Discussion -- 20.5.1 Canyon Origin -- 20.5.2 Implications for Geohazard Risk -- References -- Chapter 21: Distinguishing Sediment Bedforms from Sediment Deformation in Prodeltas of the Mediterranean Sea -- 21.1 Introduction -- 21.1.1 Regional Setting -- 21.1.2 Methods -- 21.2 Results -- 21.2.1 Morphology of Undulated Prodeltas -- 21.2.2 Seismostratigraphy of Prodelta Undulations -- 21.2.3 Physical Properties of Prodelta Undulations -- 21.2.4 Sediment Transport Processes on Undulated Prodeltas -- 21.3 Discussion and Conclusion -- References -- Chapter 22: Hydroacoustic Analysis of Mass Wasting Deposits in Lake Ohrid (FYR Macedonia/Albania) -- 22.1 Introduction. , 22.2 Seismic Stratigraphy and Slide Bodies.
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  • 4
    Keywords: Geography ; Oceanography ; Sedimentology ; Physical geography ; Konferenzschrift ; Aufsatzsammlung ; Meereskunde ; Massenbewegung
    Description / Table of Contents: Submarine mass movements are a hidden geohazard with large destructive potential for submarine installations and coastal areas. This hazard and associated risk is growing in proportion with increasing population of coastal urban agglomerations, industrial infrastructure, and coastal tourism. Also, the intensified use of the seafloor for natural resource production, and deep sea cables constitutes an increasing risk. Submarine slides may alter the coastline and bear a high tsunamogenic potential. There is a potential link of submarine mass wasting with climate change, as submarine landslides can uncover and release large amounts greenhouse gases, mainly methane, that are now stored in marine sediments. The factors that govern the stability of submarine slopes against failure, the processes that lead to slope collapses and the collapse processes by themselves need to be better understood in order to foresee and prepare society for potentially hazardous events. This book volume consists of a collection of cutting edge scientific research by international experts in the field, covering geological, geophysical, engineering and environmental aspects of submarine slope failures. The focus is on understanding the full spectrum of challenges presented by this major coastal and offshore geohazard
    Type of Medium: Book
    Pages: XVI, 683 S. , Ill., graph. Darst., Kt.
    ISBN: 9783319009711
    Series Statement: Advances in natural and technological hazards research 37
    DDC: 551.46
    Language: English
    Note: Literaturangaben , Physical properties of sedimentsGas hydrates and role of interstitial fluids in submarine slope failure -- Slope stability and risk assessment -- Monitoring, observation and repeated surveys of active slope failure processes -- Understanding failure processes from submarine landslide geomorphology -- Interaction between ocean circulation and MTDs -- Landslide generated tsunamis -- Long-term record of submarine landslides and MTD paleoseismology -- Outcrops of ancient submarine landslides.
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  • 5
    Keywords: Forschungsbericht ; Elektromobilität ; Dienstleistung ; Datennetz ; Business-to-Business-Marketing
    Type of Medium: Online Resource
    Pages: 1 Online-Ressource (41 Seiten, 1,38 MB) , Illustrationen, Karte
    Language: German
    Note: Förderkennzeichen BMWi 16SBB009A-C. - Verbund-Nummer 01134328 , Autoren dem Berichtsblatt entnommen , Paralleltitel dem englischen Berichtsblatt entnommen , Unterschiede zwischen dem gedruckten Dokument und der elektronischen Ressource können nicht ausgeschlossen werden , Mit deutscher und englischer Zusammenfassung
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  • 6
    In: Marine geology, Amsterdam [u.a.] : Elsevier Science, 1964, 263(2009), 1/4, Seite 97-107, 1872-6151
    In: volume:263
    In: year:2009
    In: number:1/4
    In: pages:97-107
    Description / Table of Contents: Newly acquired bathymetric and seismic reflection data have revealed mass-transport deposits (MTDs) on the northeastern Cretan margin in the active Hellenic subduction zone. These include a stack of two submarine landslides within the Malia Basin with a total volume of approximately 4.6 km3 covering an area of about 135 km2. These two MTDs have different geometry, internal deformations and transport structures. The older and stratigraphic lower MTD is interpreted as a debrite that fills a large part of the Malia Basin, while the second, younger MTD, with an age of at least 12.6 cal. ka B.P., indicate a thick, lens-shaped, partially translational landslide. This MTD comprises multiple slide masses with internal structure varying from highly deformed to nearly undeformed. The reconstructed source area of the older MTD is located in the westernmost Malia Basin. The source area of the younger MTD is identified in multiple headwalls at the slopebasin-transition in 450 m water depth. Numerous faults with an orientation almost parallel to the southwestnortheast-trending basin axis occur along the northern and southern boundaries of the Malia Basin and have caused a partial steepening of the slopebasin-transition. The possible triggers for slope failure and mass-wasting include (i) seismicity and (ii) movement of the uplifting island of Crete from neotectonics of the Hellenic subduction zone, and (iii) slip of clay-mineral-rich or ash-bearing layers during fluid involvement.
    Type of Medium: Online Resource
    Pages: graph. Darst
    ISSN: 1872-6151
    Language: English
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  • 7
    In: Nature geoscience, London : Nature Publishing Group, 2008, 2(2009), 9, Seite 648-652, 1752-0894
    In: volume:2
    In: year:2009
    In: number:9
    In: pages:648-652
    Description / Table of Contents: Subduction zones are often characterized by wedge-shaped sedimentary complexescalled accretionary prismsthat form when sediments are scraped off the subducting plate and added to the overriding plate. Large, landward-dipping thrust faults can cut through such a prism: these faults, known as 'megasplay faults' originate near the top of the subducting plate and terminate at the shallow, landward edge of the prism. Megasplay faults have been the subject of numerous geological and geophysical studies but their initiation and evolution through time remains poorly constrained. Here we combine seismic reflection data from the Nankai accretionary wedge with geological data collected by the Integrated Ocean Drilling Program (IODP) and find that the splay fault cutting this wedge initiated ~1.95 Million years (Myr) ago in the lower part of the prism as an out-of-sequence thrust (OOST). After an initial phase of high activity, the movement along the fault slowed down, but uplift and reactivation of the fault resumed about 1.55 Myr ago. The alternating periods of high and low activity along the splay fault that we document hint at episodic changes in the mechanical stability of accretionary prisms.
    Type of Medium: Article
    Pages: graph. Darst
    ISSN: 1752-0894
    Language: English
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  • 8
    In: Marine geology, Amsterdam [u.a.] : Elsevier Science, 1964, 271(2010), 1/2, Seite 44-54, 1872-6151
    In: volume:271
    In: year:2010
    In: number:1/2
    In: pages:44-54
    Description / Table of Contents: In this study we aim on a reconstruction of mechanisms and kinematics of slope-failure and mass-movement processes along the northeastern slope of Crete in the Hellenic forearc, eastern Mediterranean. Here, subsidence of the forearc basin and the uplift of the island of Crete cause ongoing steepening of the slope in-between. The high level of neotectonic activity in this region is expected to exert a key role in slope-failure development. Newly acquired reflection seismic data from the upper slope region reveal an intact sediment cover while the lower slope is devoid of both intact strata and mass-transport deposits (MTDs). In a mid-slope position, however, we found evidence for a not, vert, similar 4-km3-sized landslide complex that comprises several MTDs from translational transport of coherent sediment bodies over short distances. Morphometric analysis of these MTDs and their source scars indicates that this part of the northeast Cretan slope can be characterized as a cohesive slope. Furthermore, we reconstruct retrogressive development for this complex and determine a critical slope angle for both pre-conditioning of failure and subsequent landslide deposition near source scars. Consequently, data imply that the investigated shallower slope is stable due to low angles in the order of 3°, whereas 5°-inclined mid-slope portions favour both slope destabilization and landslide deposition. The failed mid-slope parts are dominated by sediment truncations from faults almost correlating with the orientation of head- and sidewalls of scars. We suggest that cohesive landslides and MTDs are generated and preserved, respectively, in such critical slope regions. If once generated, cohesive landslides reach the lower slope further downslope that exceeds the threshold gradient for MTD deposition (not, vert, similar 5°), they are transported all the way down to the foot of the slope and disintegrate to mass flows. From these observations we suggest that the mass-wasting history of the investigated Cretan slope area over a longer period of time is characterized by repeated sediment erosion and transport into the deeper Cretan Sea basin. The relocation of the critical slope portion in upslope direction and therefore recurrence of mass-wasting events is thereby likely controlled by the progressive steepening of the slope. This mechanism and restriction of sediment failure to narrow, critically-inclined and relocating slope portions likely explains how such an active margin setting can exhibit only scarce findings of MTDs on the slope despite an expected, extensive and widespread mass wasting.
    Type of Medium: Online Resource
    Pages: graph. Darst
    ISSN: 1872-6151
    Language: English
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  • 9
    Publication Date: 2023-11-27
    Description: The Bronze to Iron Age underground salt mining complex of Hallstatt (Austria) is widely recognised for its cultural importance and wealth of archaeological artefacts. However, while the daily life in the salt mines is archaeologically well documented and environmental effects of the mining activity have been investigated recently, the impact of natural hazards on the prehistoric mining community is still poorly understood. For instance, while it is well established that the prehistoric underground mines have repeatedly been destroyed by large‐scale mass movements, only little is known about the characteristics and extent of these events as well as about mass‐movement recurrence during more recent times. To shed light on past mass‐movement activity in the vicinity of the Hallstatt salt mines, we investigated sediment cores from adjacent Lake Hallstatt. Within the regular lake sediments we identified three large‐scale event deposits, which are interpreted to originate from spontaneous or seismically induced mass movements in the mid‐19th and late 9th century ce and the mid‐4th century bce. While the age of the latter event is in good agreement with the abandonment of the famous Iron Age cemetery at Hallstatt, the younger events indicate that large‐scale mass movements also occurred repeatedly during the Common Era.
    Description: Freunde des Naturhistorisches Museums Wien
    Description: Austrian Science Fund http://dx.doi.org/10.13039/501100002428
    Description: Austrian Academy of Sciences
    Description: German Archaeological Institute
    Keywords: ddc:551.3 ; Archaeology ; European Alps ; lake sediments ; mass movements ; prehistoric mining
    Language: English
    Type: doc-type:article
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  • 10
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 102 (1969), S. 1928-1936 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Es wird über die Darstellung und das thermische Verhalten von Verbindungen mit dem 3.4-Diaza-bicyclooctadien- und -trien-Ringgerüst berichtet. Die Ergebnisse sprechen dafür, daß valenztautomere Gleichgewichte der Art 1 ⇌ 2 und 3 ⇌ 4 vorliegen, die Konzentration der monocyclischen Tautomeren aber so klein ist, daß diese nicht direkt nachgewiesen werden können.
    Type of Medium: Electronic Resource
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