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  • 1
    Online Resource
    Online Resource
    Newark :John Wiley & Sons, Incorporated,
    Keywords: Geology, Stratigraphic. ; Marine sediments. ; Submarine geology. ; Turbidites. ; Turbidity currents. ; Electronic books.
    Type of Medium: Online Resource
    Pages: 1 online resource (483 pages)
    Edition: 1st ed.
    ISBN: 9781444304480
    Series Statement: International Association of Sedimentologists Series ; v.68
    Language: English
    Note: Intro -- Deep-Water Turbidite Systems -- Contents -- Preface -- Deep-water turbidite systems: an introduction -- Processes: overview and commentary -- Modelling of turbidity currents on Navy Submarine Fan, California Continental Borderland -- A physical model for the transport and sorting of fine-grained sediment by turbidity currents -- The hydraulic interpretation of turbidites from their grain sizes and sedimentary structures -- Subaqueous liquefied and fluidized sediment flows and their deposits -- Flow regimes in debris flow -- Contained (reflected) turbidity currents from the Middle Ordovician Cloridorme Formation, Quebec, Canada: an alternative to the antidune hypothesis -- Reverse flow in turbidity currents: the role of internal solitons [abstract only] -- Measurements of density underflows from Walensee, Switzerland [abstract only] -- Debris flow (olistostromes) and slumping on a distal passive continental margin: the Palombini limestone-shale sequence of the northern Apennines [abstract only] -- Water escape structures in coarse-grained sediment flows and their deposits [abstract only] -- Facies characteristics: overview and commentary -- Turbiditic and non-turbiditic mudstone of Cretaceous flysch sections of the East Alps and other basins -- Distinguishing between fine-grained turbidites and contourites on the Nova Scotian deep-water margin -- Rhythms in deep sea, fine-grained turbidite and debris-flow sequences, Middle Ordovician, eastern Tennessee -- Distinctive thin-bedded turbidite facies and related depositional environments in the Eocene Hecho Group (south-central Pyrenees, Spain) -- Sedimentology of very thick calcarenite marlstone beds in a flysch succession, southwestern Pyrenees -- The Cambro-Ordovician Cap Enrage Formation, Quebec, Canada: conglomeratic deposits of a braided submarine channel with terraces. , Deep marine arc apron deposits and syndepositional magmatism in the Alisitos group at Punta Cono, Baja California, Mexico -- Use of clay fabric to distinguish turbiditic and hemipelagic siltstones and silts [abstract only] -- The Cretaceous Talme Yafe Formation: a contour current shaped sedimentary prism of calcareous detritus at the continental margin of the Arabian Craton [abstract only] -- Mass transport in European Cretaceous chalk -- fabric criteria for its recognition [abstract only] -- Middle and Late Quaternary depositional sequences and cycles in the eastern Mediterranean [abstract only] -- Texture and structure of resedimented conglomerates: examples from Ksiaz Formation (Famennian-Tournaisian), south-western Poland [abstract only] -- Water escape structures in the context of a depositional model of a mass flow dominated conglomeratic fan-delta (Abrioja Formation, Pliocene, Almeria Basin, SE Spain) [abstract only] -- Analytical study of turbidites, Otadai Formation, Boso Peninsula, Japan [abstract only] -- Detrital modes of recent deep-sea sands and their relation to tectonic setting: a first approximation [abstract only] -- Deep-water environments: overview and commentary -- Slope-apron systems -- Sedimentary facies of the Nova Scotian upper and middle continental slope, offshore eastern Canada -- Anatomy of a modern open-ocean carbonate slope: northern Little Bahama Bank -- Mesozoic carbonate rudites, megabreccias and associated deposits from central Greece -- Trench-slope channels from the New Zealand Jurassic: the Otekura Formation, Sandy Bay, South Otago [abstract only] -- Sedimentation during carbonate ramp-to-slope evolution in a tectonically active area: Bowland Basin (Dinantian), northern England [abstract only] -- The Rio Dell Formation: a Plio-Pleistocene basin slope deposit in Northern California [abstract only]. , Submarine fan systems -- Turbidite depositional patterns and flow characteristics, Navy Submarine Fan, California Borderland -- Submarine sedimentation on a developing Holocene fan delta -- Eocene fan delta-submarine deposition in the Wagwater Trough, east-central Jamaica -- Distributary channels, sand lobes, and mesotopography of Navy Submarine Fan, Californian Borderland, with applications to ancient fan sediments [abstract only] -- Morphology and Quaternary sedimentation of the Mozambique Fan and environs, southwestern Indian Ocean [abstract only] -- Sealers Bay submarine fan complex, Oligocene, southern New Zealand [abstract only] -- Triassic carbonate submarine fans along the Arabian platform margin, Sumeini Group, Oman [abstract only] -- A carbonate submarine fan in a fault-controlled basin of the Upper Jurassic, Betic Cordillera, southern Spain [abstract only] -- Basin plain systems -- Sedimentation in the Conway Trough, a deep near-shore marine basin at the junction of the Alpine transform and Hikurangi subduction plate boundary, New Zealand -- Depositional models for fine-grained sediment in the western Hellenic Trench, Eastern Mediterranean -- Proximal to distal sedimentological variation in a linear turbidite trough: implications for the fan model -- Deep-water fan-channel conglomerates of Late Cretaceous age, southern Chile [abstract only] -- The Hunghae Formation, SE Korea: Miocene debris aprons in a back-arc intraslope basin [abstract only] -- Index.
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  • 2
    Online Resource
    Online Resource
    Milton :Taylor & Francis Group,
    Keywords: Handbooks, manuals, etc. ; Electronic books.
    Description / Table of Contents: Containing over 400 superb color photos and drawings, this book illustrates the principal types of sedimentary. An introductory chapter defines the main types of sedimentary rock and their initial recognition, followed by a section highlighting safety in the field. The author goes on to describe the main field techniques and provides a comprehensive summary of the principal characteristics of sedimentary rocks. There is a chapter on each of the main rock types and on how to interpret facies and their features in terms of depositional environments and economic significance.
    Type of Medium: Online Resource
    Pages: 1 online resource (310 pages)
    Edition: 1st ed.
    ISBN: 9781840766424
    DDC: 552.5
    Language: English
    Note: Front Cover -- CONTENTS -- PREFACE -- ACKNOWLEDGMENTS -- 1 OVERVIEW -- About this book -- Classification of sedimentary rocks -- Economic studies -- 2 FIELD TECHNIQUES -- Safety in the field -- Field equipment -- General approach and field notebook -- Basic measurements and data records -- Field sketches and logs -- Paleocurrent and paleoslope analysis -- Stratigraphic procedure and way-up criteria -- Other techniques -- 3 PRINCIPAL CHARACTERISTICS OF SEDIMENTARY ROCKS -- Introduction and facies concept -- Bedding and lamination -- Field photographs -- Erosional structures -- Field photographs -- Depositional structures -- Field photographs: parallel lamination and stratification -- Field photographs: wavy and lenticular lamination, cross-lamination and stratification -- Field photographs: graded beds and structural sequences -- Post-depositional deformation and dewatering structures -- Field photographs: slides, slumps, and chaotica -- Field photographs: deformed bedding and shale clasts -- Field photographs: water escape and desiccation structures -- Biogenic sedimentary structures -- Field photographs: bioturbation and biogenic structures -- Chemogenic sedimentary structures -- Field photographs -- Sediment texture and fabric -- Sediment composition -- Hand-lens photographs -- Fossils -- Sediment colour -- 4 CONGLOMERATES -- Definition and range of types -- Principal sedimentary characteristics -- Classification of conglomerates -- Occurrence -- Field photographs -- 5 SANDSTONES -- Definition and range of types -- Principal sedimentary characteristics -- Classification of sandstones -- Occurrence -- Field photographs -- 6 MUDROCKS -- Definition and range of types -- Principal sedimentary characteristics -- Classification of mudrocks -- Occurrence -- Field photographs -- 7 CARBONATE ROCKS -- Definition and range of types. , Principal sedimentary characteristics -- Classification of carbonate rocks -- Principal characteristics of dolomites -- Occurrence -- Field photographs -- 8 CHERTS AND SILICEOUS SEDIMENTS -- Definition and range of types -- Principal sedimentary characteristics -- Occurrence -- Field photographs -- 9 PHOSPHORITES -- Definition and range of types -- Principal sedimentary characteristics -- Occurrence -- Field photographs -- 10 COAL AND OIL -- Definition and range of types -- Principal sedimentary characteristics -- Occurrence -- Field photographs -- 11 EVAPORITES -- Definition and range of types -- Principal sedimentary characteristics -- Occurrence -- Field photographs -- 12 IRONSTONES -- Definition and range of types -- Principal sedimentary characteristics -- Occurrence -- Field photographs -- 13 SOILS, PALEOSOLS, AND DURICRUSTS -- Definition and range of types -- Principal sedimentary characteristics -- Field photographs -- 14 VOLCANICLASTIC SEDIMENTS -- Definition and range of types -- Principal sedimentary characteristics -- Occurrence -- Field photographs -- 15 INTERPRETATIONS AND DEPOSITIONAL ENVIRONMENTS -- Building blocks -- Facies characteristics and models -- Facies sequences and cycles -- Lateral trends and geometry -- Architectural elements and facies associations -- Sequence stratigraphy and bounding surfaces -- Field photographs: cycles, geometry, and unconformities -- Sediment interpretation in cores -- Core photographs -- Controls, rates, and preservation -- Depositional environments -- Field photographs: alluvial-fluvial environments -- Field photographs: desert-eolian environments -- Field photographs: glacial environments -- Field photographs: deltaic environments -- Field photographs: volcaniclastic environments -- Field photographs: shallow marine clastic environments -- Field photographs: marine evaporites and carbonates. , Field photographs: deep marine environments -- Tables: diagnostic features -- REFERENCES AND KEY TEXTS -- METRIC-IMPERIAL CONVERSIONS -- APPENDICES -- Stratigraphic timescale -- Mapping symbols -- Grain-size comparator chart -- Sediment description checklist -- Wulff stereonet -- Lambert equal-area projection -- Back Cover.
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  • 3
    Book
    Book
    Oxford : Blackwell Scientific Publ.
    Keywords: Turbidites ; Marine sediments ; Turbidity currents ; Submarine geology ; Geology, Stratigraphic ; geology, stratigraphic - methodology ; submarine geology ; Aufsatzsammlung ; Tiefseesediment ; Turbidit ; Suspensionsströmung
    Type of Medium: Book
    Pages: VI, 473 S , Ill., graph. Darst., Kt
    ISBN: 0632032626
    Series Statement: Reprint series of the International Association of Sedimentologists 3
    DDC: 552.5
    Language: English
    Note: Includes bibliographical references and index
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  • 4
    Keywords: Sediments (Geology) Congresses ; Facies (Geology) Congresses ; Sedimentation and deposition Congresses ; Turbidites Congresses ; Fine-grained sediments. Transport & deposition by water ; Feinkörniges Sediment++Kongress++Halifax 〈Nova Scotia, 1982〉
    Type of Medium: Online Resource
    Pages: 1 Online-Ressource (VI, 659 Seiten)
    ISBN: 0632010754
    Series Statement: Geological Society special publication 15
    DDC: 551.36
    Language: English
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  • 5
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Sedimentology 27 (1980), S. 0 
    ISSN: 1365-3091
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences
    Notes: Turbidite muds in cores from the outer Scotian continental margin, off eastern Canada, contain abundant thin silt laminae. Graded laminated units are recognized in parts of this sequence. These represent single depositional events, and show a regular decrease in modal grain size and thickness of the silt laminae through the unit. A similar fining trend is shown by both silt and mud layers over hundreds of kilometres downslope. Textural analysis of individual laminae allows the construction of a dynamically consistent physical model for transport and sorting in muddy turbidity currents. Hydraulic sorting aggregates finer material to the top and tail regions of a large turbidity flow which then overspills its channel banks. Downslope lateral sorting occurs with preferential deposition of coarser silt grains and larger mud flocs. Depositional sorting by increased shear in the boundary layer separates clay flocs from silt grains and results in a regular mud/silt lamination. Estimates can be made of the physical parameters of the turbidity flows involved. They are a minimum of several hundreds of metres thick, have low concentrations (of the order of 10−3 or 2500 mg 1−1), and move downslope at velocities of 10-20 cm s−1. A 5 mm thick, coarse silt lamina takes about 10 h to deposit, and the subsequent mud layer ‘blankets’ very rapidly over this. A complete unit is deposited in 2-6 days which is the time it takes for the turbidity flow to pass a particular point. These thick, dilute, low-velocity flows are significantly different from the ‘classical’ turbidity current. However, there is mounting evidence in support of the new concept from laboratory observations and direct field measurements.
    Type of Medium: Electronic Resource
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  • 6
    ISSN: 1365-3091
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences
    Notes: The Moroccan Turbidite System (MTS) on the north-west African margin extends 1500 km from the head of the Agadir Canyon to the Madeira Abyssal Plain, making it one of the longest turbidite systems in the world. The MTS consists of three interconnected deep-water basins, the Seine Abyssal Plain (SAP), the Agadir Basin and the Madeira Abyssal Plain (MAP), connected by a network of distributary channels. Excellent core control has enabled individual turbidites to be correlated between all three basins, giving a detailed insight into the turbidite depositional architecture of a system with multiple source areas and complex morphology. Large-volume (〉 100 km3) turbidites, sourced from the Morocco Shelf, show a relatively simple architecture in the Madeira and Seine Abyssal Plains. Sandy bases form distinct lobes or wedges that thin rapidly away from the basin margin and are overlain by ponded basin-wide muds. However, in the Agadir Basin, the turbidite fill is more complex owing to a combination of multiple source areas and large variations in turbidite volume. A single, very large turbidity current (200–300 km3 of sediment) deposited most of its sandy load within the Agadir Basin, but still had sufficient energy to carry most of the mud fraction 500 km further downslope to the MAP. Large turbidity currents (100–150 km3 of sediment) deposit most of their sand and mud fraction within the Agadir Basin, but also transport some of their load westwards to the MAP. Small turbidity currents (〈 35 km3 of sediment) are wholly confined within the Agadir Basin, and their deposits pinch out on the basin floor. Turbidity currents flowing beyond the Agadir Basin pass through a large distributary channel system. Individual turbidites correlated across this channel system show major variations in the mineralogy of the sand fraction, whereas the geochemistry and micropalaeontology of the mud fraction remain very similar. This is interpreted as evidence for separation of the flow, with a sand-rich, erosive, basal layer confined within the channel system, overlain by an unconfined layer of suspended mud. Large-volume turbidites within the MTS were deposited at oxygen isotope stage boundaries, during periods of rapid sea-level change and do not appear to be specifically connected to sea-level lowstands or highstands. This contrasts with the classic fan model, which suggests that most turbidites are deposited during lowstands of sea level. In addition, the three largest turbidites on the MAP were deposited during the largest fluctuations in sea level, suggesting a link between the volume of sediment input and the magnitude of sea-level change.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Sedimentology 26 (1979), S. 0 
    ISSN: 1365-3091
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences
    Notes: Review of the criteria which have been proposed for distinguishing between the deposits of turbidity currents and bottom currents in deep water sedimentation shows no general agreement on their validity. It is important to compare finegrained turbidites and contourites, to recognize that different turbidity current and bottom current mechanisms exist, and that their deposits may be closely inter-bedded in a continental rise environment.Interbedded turbidites and contourites have been recognized in cores from the deep-water margin off Nova Scotia. The most useful criteria for distinguishing between the two deposits were found to be: (1) fining and sorting trends: perpendicular or parallel to the contours; (2) marked textural differences between interbedded turbidites and contourites indicating differences in source and transport distance; (3) mineralogy and textural composition: regional patterns indicating transport perpendicular or parallel to the contours; (4) grain fabric: indication of downslope or along-slope transport at the time of final deposition; (5) sedimentary structures: turbidites show a structural sequence and evidence of rapid burial; contourites are bioturbated and contain irregular lag concentrations of biogenic sand. Other criteria include grain-size parameters, and the regional setting, distribution and depositional rate of the various facies. With due care these criteria can be applied to other regions.Previously used characteristics of silt-laminae abundance, layer thickness, heavy mineral cross lamination, sorting, and the nature of bed contacts are not applicable to fine-grained turbidites and contourites. Compositional criteria depend on regional features.
    Type of Medium: Electronic Resource
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  • 8
    ISSN: 1365-3091
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences
    Notes: An integrated geophysical and sedimentological investigation of the Selvage sediment-wave field has revealed that the sediment waves are formed beneath unconfined turbidity currents. The sediment waves occur on the lower continental rise and display wavelengths of up to 1 km and wave heights of up to 6 m. Wave sediments consist of interbedded turbidites and pelagic/hemipelagic marls and oozes. Nannofossil-based dating of the sediments indicates a bulk sedimentation rate of 2·4 cm 1000 years–1, and the waves are migrating upslope at a rate of 0·28 m 1000 years–1. Sediment provenance studies reveal that the turbidity currents maintaining the waves are largely sourced from volcanic islands to the south. Investigation of existing models for sediment-wave formation leads to the conclusion that the Selvage sediment waves form as giant antidunes. Simple numerical modelling reveals that turbidity currents crossing the wave field have internal Froude numbers of 0·5–1·9, which is very close to the antidune existence limits. Depositional flow velocities range from 〈6 to 125 cm–1. There is a rapid increase in wavelength and flow thickness in the upper 10 km of the wave field, which is unexpected, as the slope angle remains relatively constant. This anomaly is possibly linked to a topographic obstacle just upslope of the sediment waves. Flows passing over the obstacle may undergo a hydraulic jump at its boundary, leading to an increase in flow thickness. In the lower 15 km of the wave field, flow thickness decreases downslope by 60%, which is comparable with results obtained for other unconfined turbidity currents undergoing flow expansion.
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 274 (1978), S. 324-328 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Many mechanisms have been proposed for the origin of lamination in deep sea sediments, but without general agreement. Experiments in other environments have suggested that several different processes may operate in particle flow conditions. Those relevant to deep water conditions are briefly ...
    Type of Medium: Electronic Resource
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  • 10
    ISSN: 1573-0956
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Type of Medium: Electronic Resource
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