ALBERT

Beschreibung / Inhaltsverzeichnis: Pages 1-3: Introduction --- Pages 4-11: Euler equations --- Pages 12-32: Vortex model --- Pages 33-52: An existence theorem for Euler equations --- Pages 53-66: Further considerations on vortex model --- Pages 67-79: A mean field limit --- Pages 80-86: Navier-Stokes equations --- Pages 87-98: Diffusion process and Navier-Stokes equations --- Pages 99-115: Mean field limit and propagation of chaos for Navier-Stokes equations --- Pages 116-129: The problem of boundary conditions, chorin method and concluding remarks

Beschreibung / Inhaltsverzeichnis: Lectures given at the International Conference on Differential Equations held at the University of Alabama in Birmingham during March 21-26, 1983

Beschreibung / Inhaltsverzeichnis: Papers presented at an international meeting held at the University of Toronto, June 20-24, 1983, under the auspices of the Canadian Applied Mathematics Society

Beschreibung / Inhaltsverzeichnis: I. Nature and Formation of Oceanic Lithosphere --- Magma Chambers: Products and Processes --- J. A. Orcutt, M. Burnett, and J. S. McClain: Evolution of the ocean crust: results from recent seismic experiments / Geological Society, London, Special Publications, 13:7-16, doi:10.1144/GSL.SP.1984.013.01.01 --- M. R. Fisk: Depths and temperatures of mid-ocean-ridge magma chambers and the composition of their source magmas / Geological Society, London, Special Publications, 13:17-23, doi:10.1144/GSL.SP.1984.013.01.02 --- M. F. J. Flower: Spreading-rate parameters in ocean crust: analogue for ophiolite? / Geological Society, London, Special Publications, 13:25-40, doi:10.1144/GSL.SP.1984.013.01.03 --- J. D. Smewing, N. I. Christensen, I. D. Bartholomew, and P. Browning: The structure of the oceanic upper mantle and lower crust as deduced from the northern section of the Oman ophiolite / Geological Society, London, Special Publications, 13:41-53, doi:10.1144/GSL.SP.1984.013.01.04 --- R. T. Gregory: Melt percolation beneath a spreading ridge: evidence from the Semail peridotite, Oman / Geological Society, London, Special Publications, 13:55-62, doi:10.1144/GSL.SP.1984.013.01.05 --- J. S. Pallister: Parent magmas of the Semail ophiolite, Oman / Geological Society, London, Special Publications, 13:63-70, doi:10.1144/GSL.SP.1984.013.01.06 --- P. Browning: Cryptic variation within the Cumulate Sequence of the Oman ophiolite: magma chamber depth and petrological implications / Geological Society, London, Special Publications, 13:71-82, doi:10.1144/GSL.SP.1984.013.01.07 --- D. Elthon, J. F. Casey, and S. Komor: Cryptic mineral-chemistry variations in a detailed traverse through the cumulate ultramafic rocks of the North Arm Mountain massif of the Bay of Islands ophiolite, Newfoundland / Geological Society, London, Special Publications, 13:83-97, doi:10.1144/GSL.SP.1984.013.01.08 --- Fracture Zones --- R. S. White: Atlantic oceanic crust: seismic structure of a slow-spreading ridge / Geological Society, London, Special Publications, 13:101-111, doi:10.1144/GSL.SP.1984.013.01.09 --- J. M. Auzende, G. Ceuleneer, G. Cornen, T. Juteau, Y. Lagabrielle, G. Lensch, C. Mevel, A. Nicolas, H. Prichard, A. Ribeiro, E. Ruellan, and J. R. Vanney: Intraoceanic tectonism on the Gorringe Bank: observations by submersible / Geological Society, London, Special Publications, 13:113-120, doi:10.1144/GSL.SP.1984.013.01.10 --- J. Honnorez, C. Mevel, and R. Montigny: Occurrence and significance of gneissic amphibolites in the Vema fracture zone, equatorial Mid-Atlantic Ridge / Geological Society, London, Special Publications, 13:121-130, doi:10.1144/GSL.SP.1984.013.01.11 --- J. A. Karson: Variations in structure and petrology in the Coastal Complex, Newfoundland: anatomy of an oceanic fracture zone / Geological Society, London, Special Publications, 13:131-144, doi:10.1144/GSL.SP.1984.013.01.12 --- Mantle Structures --- A. Nicolas and M. Rabinowicz: Mantle flow pattern at oceanic spreading centres: relation with ophiolitic and oceanic structures / Geological Society, London, Special Publications, 13:147-151, doi:10.1144/GSL.SP.1984.013.01.13 --- Lavas and Sediments --- J. Malpas and G. Langdon: Petrology of the Upper Pillow Lava suite, Troodos ophiolite, Cyprus / Geological Society, London, Special Publications, 13:155-167, doi:10.1144/GSL.SP.1984.013.01.14 --- J. F. Boyle and A. H. F. Robertson: Evolving metallogenesis at the Troodos spreading axis / Geological Society, London, Special Publications, 13:169-181, doi:10.1144/GSL.SP.1984.013.01.1--- Isotope Studies & Metamorphism --- D. Elthon, J. R. Lawrence, R. E. Hanson, and C. Stern: Modelling of oxygen-isotope data from the Sarmiento ophiolite complex, Chile / Geological Society, London, Special Publications, 13:185-197, doi:10.1144/GSL.SP.1984.013.01.16 --- D. S. Stakes, H. P. Taylor , jr, and R. L. Fisher: Oxygen-isotope and geochemical characterization of hydrothermal alteration in ophiolite complexes and modern oceanic crust / Geological Society, London, Special Publications, 13:199-214, doi:10.1144/GSL.SP.1984.013.01.17 --- M. J. Thirlwall and B. J. Bluck: Sr-Nd isotope and chemical evidence that the Ballantrae ‘ophiolite’, SW Scotland, is polygenetic / Geological Society, London, Special Publications, 13:215-230, doi:10.1144/GSL.SP.1984.013.01.18 --- M. A. Menzies: Chemical and isotopic heterogeneities in orogenic and ophiolitic peridotites / Geological Society, London, Special Publications, 13:231-240, doi:10.1144/GSL.SP.1984.013.01.19 --- Zulfiqar Ahmed and A. Hall: Petrology and mineralization of the Sakhakot-Qila ophiolite, Pakistan / Geological Society, London, Special Publications, 13:241-252, doi:10.1144/GSL.SP.1984.013.01.20 --- II. Emplacement (Obduction) of Ophiolites --- Ophiolite Emplacement and Obduction --- J. G. Spray: Possible causes and consequences of upper mantle decoupling and ophiolite displacement / Geological Society, London, Special Publications, 13:255-268, doi:10.1144/GSL.SP.1984.013.01.21 --- J. F. Casey and J. F Dewey: Initiation of subduction zones along transform and accreting plate boundaries, triple-junction evolution, and forearc spreading centres—implications for ophiolitic geology and obduction / Geological Society, London, Special Publications, 13:269-290, doi:10.1144/GSL.SP.1984.013.01.22 --- Y. Ogawa and J. Naka: Emplacement of ophiolitic rocks in forearc areas: Examples from central Japan and Izu-Mariana-Yap island arc system / Geological Society, London, Special Publications, 13:291-301, doi:10.1144/GSL.SP.1984.013.01.23 --- M. P. Searle and R. K. Stevens: Obduction processes in ancient, modern and future ophiolites / Geological Society, London, Special Publications, 13:303-319, doi:10.1144/GSL.SP.1984.013.01.24 --- N. H. Woodcock and A. H. F. Robertson: The structural variety in Tethyan ophiolite terrains / Geological Society, London, Special Publications, 13:321-330, doi:10.1144/GSL.SP.1984.013.01.25 --- Regional Studies --- H. Colley: An ophiolite suite in Fiji? / Geological Society, London, Special Publications, 13:333-340, doi:10.1144/GSL.SP.1984.013.01.26 --- H. L. Davies and A. L. Jaques: Emplacement of ophiolite in Papua New Guinea / Geological Society, London, Special Publications, 13:341-349, doi:10.1144/GSL.SP.1984.013.01.27 --- J. S. Milsom: The gravity field of the Marum ophiolite complex, Papua New Guinea / Geological Society, London, Special Publications, 13:351-357, doi:10.1144/GSL.SP.1984.013.01.28 --- R. G. Coleman: Ophiolites and the tectonic evolution of the Arabian Peninsula / Geological Society, London, Special Publications, 13:359-366, doi:10.1144/GSL.SP.1984.013.01.29 --- G. Wadge, G. Draper, and J. F. Lewis: Ophiolites of the northern Caribbean: A reappraisal of their roles in the evolution of the Caribbean plate boundary / Geological Society, London, Special Publications, 13:367-380, doi:10.1144/GSL.SP.1984.013.01.30 --- B. A. Sturt, H. Furnes, and D. Roberts: A conspectus of Scandinavian Caledonian ophiolites / Geological Society, London, Special Publications, 13:381-391, doi:10.1144/GSL.SP.1984.013.01.31 --- R. Hall: Ophiolites: Figments of Oceanic Lithosphere? / Geological Society, London, Special Publications, 13:393-403, doi:10.1144/GSL.SP.1984.013.01.32 --- D. A. Rothery: The role of Landsat Multispectral Scanner (MSS) imagery in mapping the Oman ophiolite / Geological Society, London, Special Publications, 13:405-413, doi:10.1144/GSL.SP.1984.013.01.33

Beschreibung / Inhaltsverzeichnis: Introduction --- D. A. V. Stow and D. J. W. Piper: Deep-water fine-grained sediments; history, methodology and terminology / Geological Society, London, Special Publications, 15:3-14, doi:10.1144/GSL.SP.1984.015.01.01 --- Processes --- D. S. Gorsline: A review of fine-grained sediment origins, characteristics, transport and deposition / Geological Society, London, Special Publications, 15:17-34, doi:10.1144/GSL.SP.1984.015.01.02 --- I. N. McCave: Erosion, transport and deposition of fine-grained marine sediments / Geological Society, London, Special Publications, 15:35-69, doi:10.1144/GSL.SP.1984.015.01.03 --- S. L. Eittreim: Methods and observations in the study of deep-sea suspended particulate matter / Geological Society, London, Special Publications, 15:71-82, doi:10.1144/GSL.SP.1984.015.01.04 --- Kate Kranck: Grain-size characteristics of turbidites / Geological Society, London, Special Publications, 15:83-92, doi:10.1144/GSL.SP.1984.015.01.05 --- Terrigenous Turbidites and Associated Facies --- T. C. E. van Weering and J. van Iperen: Fine-grained sediments of the Zaire deep-sea fan, southern Atlantic Ocean / Geological Society, London, Special Publications, 15:95-113, doi:10.1144/GSL.SP.1984.015.01.06 --- A. Monaco and Y. Mear: Sedimentary sequences on the north-west Mediterranean margin during the Late Quaternary: a dynamic interpretation / Geological Society, London, Special Publications, 15:115-125, doi:10.1144/GSL.SP.1984.015.01.07 --- D. A. V. Stow, M. Alam, and D. J. W. Piper: Sedimentology of the Halifax Formation, Nova Scotia: Lower Palaeozoic fine-grained turbidites / Geological Society, London, Special Publications, 15:127-144, doi:10.1144/GSL.SP.1984.015.01.08 --- R. B. Kidd and R. C. Searle: Sedimentation in the southern Cape Verde Basin: regional observations by long-range sidescan sonar / Geological Society, London, Special Publications, 15:145-152, doi:10.1144/GSL.SP.1984.015.01.09 --- G. A. Auffret, R. Le Suave, R. Kerbrat, B. Sichler, S. Roy, C. Laj, and C. Muller: Sedimentation in the southern Cape Verde Basin: seismic and sediment facies / Geological Society, London, Special Publications, 15:153-167, doi:10.1144/GSL.SP.1984.015.01.10 --- H. Got: Sedimentary processes on the west Hellenic Arc margin / Geological Society, London, Special Publications, 15:169-183, doi:10.1144/GSL.SP.1984.015.01.11 --- S. K. Chough: Fine-grained turbidites and associated mass-flow deposits in the Ulleung (Tsushima) Back-arc Basin, East Sea (Sea of Japan) / Geological Society, London, Special Publications, 15:185-196, doi:10.1144/GSL.SP.1984.015.01.12 --- Carbonate Turbidites and Associated Facies --- K. C. Heath and H. T. Mullins: Open-ocean, off-bank transport of fine-grained carbonate sediment in the Northern Bahamas / Geological Society, London, Special Publications, 15:199-208, doi:10.1144/GSL.SP.1984.015.01.13 --- J.-C. Faugères, M. Cremer, E. Gonthier, M. Noel, and J. Poutiers: Late Quaternary calcareous clayey-silty muds in the Obock Trough (Gulf of Aden): hemipelagites or fine-grained turbidites? / Geological Society, London, Special Publications, 15:209-222, doi:10.1144/GSL.SP.1984.015.01.14 --- D. A. V. Stow, S. C. R. Rainey, G. Angell, F. C. Wezel, and D. Savelli: Depositional model for calcilutites: Scaglia Rossa limestones, Umbro-Marchean Apennines / Geological Society, London, Special Publications, 15:223-241, doi:10.1144/GSL.SP.1984.015.01.15 --- Contourites --- D. A. V. Stow and J. A. Holbrook: North Atlantic contourites: an overview / Geological Society, London, Special Publications, 15:245-256, doi:10.1144/GSL.SP.1984.015.01.16 --- A. N. Shor, D. V. Kent, and R. D. Flood: Contourite or turbidite?: magnetic fabric of fine-grained Quaternary sediments, Nova Scotia continental rise / Geological Society, London, Special Publications, 15:257-273, doi:10.1144/GSL.SP.1984.015.01.17 --- E. G. Gonthier, J.-C. Faugères, and D. A. V. Stow: Contourite facies of the Faro Drift, Gulf of Cadiz / Geological Society, London, Special Publications, 15:275-292, doi:10.1144/GSL.SP.1984.015.01.18 --- J. D. Halfman and T. C. Johnson: The sediment texture of contourites in Lake Superior / Geological Society, London, Special Publications, 15:293-307, doi:10.1144/GSL.SP.1984.015.01.19 --- Hemipelagites and Associated Facies of Slopes and Slope Basins --- P. R. Hill: Facies and sequence analysis of Nova Scotian Slope muds: turbidite vs ‘hemipelagic’ deposition / Geological Society, London, Special Publications, 15:311-318, doi:10.1144/GSL.SP.1984.015.01.20 --- B. A. McGregor, T. A. Nelsen, W. L. Stubblefield, and G. F. Merrill: The role of canyons in late Quaternary deposition on the United States mid-Atlantic continental rise / Geological Society, London, Special Publications, 15:319-330, doi:10.1144/GSL.SP.1984.015.01.21 --- P. F. Ballance, M. R. Gregory, G. W. Gibson, G. C. H. Chaproniere, A. P. Kadar, and T. Sameshima: A late Miocene and early Pliocene upper slope-to-shelf sequence of calcareous fine sediment from the Pacific margin of New Zealand / Geological Society, London, Special Publications, 15:331-342, doi:10.1144/GSL.SP.1984.015.01.22 --- K. T. Pickering: Facies, facies-associations and sediment transport/deposition processes in a late Precambrian upper basin-slope/pro-delta,, Finnmark, N. Norway / Geological Society, London, Special Publications, 15:343-362, doi:10.1144/GSL.SP.1984.015.01.23 --- L. A. Krissek: Continental source area contributions to fine-grained sediments on the Oregon and Washington continental slope / Geological Society, London, Special Publications, 15:363-375, doi:10.1144/GSL.SP.1984.015.01.24 --- S. E. Thornton: Basin model for hemipelagic sedimentation in a tectonically active continental margin: Santa Barbara Basin, California Continental Borderland / Geological Society, London, Special Publications, 15:377-394, doi:10.1144/GSL.SP.1984.015.01.25 --- D. S. Gorsline, R. L. Kolpack, H. A. Karl, D. E. Drake, S. E. Thornton, J. R. Schwalbach, C. E. Savrda, and P. Fleischer: Studies of fine-grained sediment transport processes and products in the California Continental Borderland / Geological Society, London, Special Publications, 15:395-415, doi:10.1144/GSL.SP.1984.015.01.26 --- R. Bourrouilh and D. S. Gorsline: Fine-grained sediments associated with fan lobes: Santa Paula Creek, California / Geological Society, London, Special Publications, 15:417-433, doi:10.1144/GSL.SP.1984.015.01.27 --- Pelagites and Organic-Rich Sediments --- A. H. F. Robertson: Origin of varve-type lamination, graded claystones and limestone-shale ‘couplets’ in the lower Cretaceous of the western North Atlantic / Geological Society, London, Special Publications, 15:437-452, doi:10.1144/GSL.SP.1984.015.01.28 --- A. B. Hayward: Hemipelagic chalks in a clastic submarine fan sequence: Miocene SW Turkey / Geological Society, London, Special Publications, 15:453-467, doi:10.1144/GSL.SP.1984.015.01.29 --- P. D. Crevello, J. W. Patton, T. W. Oesleby, W. Schlager, and A. Droxler: Source rock potential of Bahamian Trough carbonates / Geological Society, London, Special Publications, 15:469-480, doi:10.1144/GSL.SP.1984.015.01.30 --- C. M. Isaacs: Hemipelagic deposits in a Miocene basin, California: toward a model of lithologic variation and sequence / Geological Society, London, Special Publications, 15:481-496, doi:10.1144/GSL.SP.1984.015.01.31 --- George C. Anastasakis and Daniel Jean Stanley: Sapropels and organic-rich variants in the Mediterranean: sequence development and classification / Geological Society, London, Special Publications, 15:497-510, doi:10.1144/GSL.SP.1984.015.01.32 --- A. Thickpenny: The sedimentology of the Swedish Alum Shales / Geological Society, London, Special Publications, 15:511-525, doi:10.1144/GSL.SP.1984.015.01.33 --- M. A. Arthur, W. E. Dean, and D. A. V. Stow: Models for the deposition of Mesozoic-Cenozoic fine-grained organic-carbon-rich sediment in the deep sea / Geological Society, London, Special Publications, 15:527-560, doi:10.1144/GSL.SP.1984.015.01.34 --- Internal Characteristics --- R. W. Faas: Plasticity and compaction characteristics of the Quaternary sediments penetrated on the Guatemalan Transect—DSDP Leg 67 / Geological Society, London, Special Publications, 15:563-577, doi:10.1144/GSL.SP.1984.015.01.35 --- C. F. Moon and C. W. Hurst: Fabric of muds and shales: an overview / Geological Society, London, Special Publications, 15:579-593, doi:10.1144/GSL.SP.1984.015.01.36 --- A. Wetzel: Bioturbation in deep-sea fine-grained sediments: influence of sediment texture, turbidite frequency and rates of environmental change / Geological Society, London, Special Publications, 15:595-608, doi:10.1144/GSL.SP.1984.015.01.37 --- Facies Models: Synthesis --- D. A. V. Stow and D. J. W. Piper: Deep-water fine-grained sediments: facies models / Geological Society, London, Special Publications, 15:611-646, doi:10.1144/GSL.SP.1984.015.01.38

Beschreibung / Inhaltsverzeichnis: Processes --- Richard V. Fisher: Submarine volcaniclastic rocks / Geological Society, London, Special Publications, 16:5-27, doi:10.1144/GSL.SP.1984.016.01.02 --- Eizo Yamada: Subaqueous pyroclastic flows: their development and their deposits / Geological Society, London, Special Publications, 16:29-35, doi:10.1144/GSL.SP.1984.016.01.03 --- Steven Carey and Haraldur Sigurdsson: A model of volcanogenic sedimentation in marginal basins / Geological Society, London, Special Publications, 16:37-58, doi:10.1144/GSL.SP.1984.016.01.04 --- Andrew D. Saunders and John Tarney: Geochemical characteristics of basaltic volcanism within back-arc basins / Geological Society, London, Special Publications, 16:59-76, doi:10.1144/GSL.SP.1984.016.01.05 --- J. A. Pearce, S. J. Lippard, and S. Roberts: Characteristics and tectonic significance of supra-subduction zone ophiolites / Geological Society, London, Special Publications, 16:77-94, doi:10.1144/GSL.SP.1984.016.01.06 --- Western Pacific Region --- E. C. Leitch: Marginal basins of the SW Pacific and the preservation and recognition of their ancient analogues: a review / Geological Society, London, Special Publications, 16:97-108, doi:10.1144/GSL.SP.1984.016.01.07 --- J. W. Cole: Taupo-Rotorua Depression: an ensialic marginal basin of North Island, New Zealand / Geological Society, London, Special Publications, 16:109-120, doi:10.1144/GSL.SP.1984.016.01.08 --- K. B. Lewis and H. M. Pantin: Intersection of a marginal basin with a continent: structure and sediments of the Bay of Plenty, New Zealand / Geological Society, London, Special Publications, 16:121-135, doi:10.1144/GSL.SP.1984.016.01.09 --- D. S. Cronan, R. Hodkinson, S. A. Moorby, G. P. Glasby, K. Knedler, and J. Thomson: Hydrothermal and volcaniclastic sedimentation on the Tonga-Kermadec Ridge and in its adjacent marginal basins / Geological Society, London, Special Publications, 16:137-149, doi:10.1144/GSL.SP.1984.016.01.10 --- H. Colley and W. H. Hindle: Volcano-tectonic evolution of Fiji and adjoining marginal basins / Geological Society, London, Special Publications, 16:151-162, doi:10.1144/GSL.SP.1984.016.01.11 --- I. E. Smith and J. S. Milsom: Late Cenozoic volcanism and extension in Eastern Papua / Geological Society, London, Special Publications, 16:163-171, doi:10.1144/GSL.SP.1984.016.01.12 --- P. M. Sychev and A. Y. Sharaskin: Heat flow and magmatism in the NW Pacific back-arc basins / Geological Society, London, Special Publications, 16:173-181, doi:10.1144/GSL.SP.1984.016.01.13 --- South America & Antarctica --- G. Åberg, L. Aguirre, B. Levi, J. O. Nyström, and L. Aguirre: Spreading-subsidence and generation of ensialic marginal basins: an example from the early Cretaceous of central Chile / Geological Society, London, Special Publications, 16:185-193, doi:10.1144/GSL.SP.1984.016.01.14 --- D. S. Bartholomew and J. Tarney: Crustal extension in the Southern Andes (45–46°S) / Geological Society, London, Special Publications, 16:195-205, doi:10.1144/GSL.SP.1984.016.01.15 --- B. C. Storey and D. I. M. Macdonald: Processes of formation and filling of a Mesozoic back-arc basin on the island of South Georgia / Geological Society, London, Special Publications, 16:207-218, doi:10.1144/GSL.SP.1984.016.01.16 --- G. W. Farquharson, R. D. Hamer, and J. R. Ineson: Proximal volcaniclastic sedimentation in a Cretaceous back-arc basin, northern Antarctic Peninsula / Geological Society, London, Special Publications, 16:219-229, doi:10.1144/GSL.SP.1984.016.01.17 --- Lower Palaeozoic --- D. Roberts, T. Grenne, and P. D. Ryan: Ordovician marginal basin development in the central Norwegian Caledonides / Geological Society, London, Special Publications, 16:233-244, doi:10.1144/GSL.SP.1984.016.01.18 --- B. P. Kokelaar, M. F. Howells, R. E. Bevins, R. A. Roach, and P. N. Dunkley: The Ordovician marginal basin of Wales / Geological Society, London, Special Publications, 16:245-269, doi:10.1144/GSL.SP.1984.016.01.19 --- B. E. Lorenz: Mud-magma interactions in the Dunnage Mélange, Newfoundland / Geological Society, London, Special Publications, 16:271-277, doi:10.1144/GSL.SP.1984.016.01.20 --- Guoqiang Pan: The Late Precambrian and early Palaeozoic marginal basin of South China / Geological Society, London, Special Publications, 16:279-284, doi:10.1144/GSL.SP.1984.016.01.21 --- Zhijin Zhang: Lower Palaeozoic volcanism of northern Qilianshan, NW China / Geological Society, London, Special Publications, 16:285-289, doi:10.1144/GSL.SP.1984.016.01.22 --- B. P. Kokelaar, M. F. Howells, R. E. Bevins, and R. A. Roach: Volcanic and associated sedimentary and tectonic processes in the Ordovician marginal basin of Wales: a field guide / Geological Society, London, Special Publications, 16:291-322, doi:10.1144/GSL.SP.1984.016.01.23

Beschreibung / Inhaltsverzeichnis: Mainland Europe --- K. Weber: Variscan events: early Palaeozoic continental rift metamorphism and late Palaeozoic crustal shortening / Geological Society, London, Special Publications, 14:3-22, doi:10.1144/GSL.SP.1984.014.01.02 --- R. Meissner, M. Springer, and E. Flüh: Tectonics of the Variscides in North-Western Germany based on seismic reflection measurements / Geological Society, London, Special Publications, 14:23-32, doi:10.1144/GSL.SP.1984.014.01.03 --- Wolfgang Franke: Late events in the tectonic history of the Saxothuringian zone / Geological Society, London, Special Publications, 14:33-45, doi:10.1144/GSL.SP.1984.014.01.04 --- J. P. Burg, Ph. Matte, A. Leyreloup, and J. Marchand: Inverted metamorphic zonation and large-scale thrusting in the Variscan Belt: an example in the French Massif Central / Geological Society, London, Special Publications, 14:47-61, doi:10.1144/GSL.SP.1984.014.01.05 --- Jean-Michel Quenardel and Patrick Rolin: Palaeozoic evolution of the Plateau d’Aigurande (NW Massif Central, France) / Geological Society, London, Special Publications, 14:63-70, doi:10.1144/GSL.SP.1984.014.01.06 --- S. C. Matthews: Northern margins of the Variscides in the North Atlantic region: comments on the tectonic context of the problem / Geological Society, London, Special Publications, 14:71-85, doi:10.1144/GSL.SP.1984.014.01.07 --- Britain --- M. P. Coward and S. Smallwood: An interpretation of the Variscan tectonics of SW Britain / Geological Society, London, Special Publications, 14:89-102, doi:10.1144/GSL.SP.1984.014.01.08 --- B. E. Leveridge, M. T. Holder, and G. A. Day: Thrust nappe tectonics in the Devonian of south Cornwall and the western English Channel / Geological Society, London, Special Publications, 14:103-112, doi:10.1144/GSL.SP.1984.014.01.09 --- T. J. Chapman, R. L. Fry, and P. T. Heavey: A structural cross-section through SW Devon / Geological Society, London, Special Publications, 14:113-118, doi:10.1144/GSL.SP.1984.014.01.10 --- J. W. F. Edwards: Interpretations of seismic and gravity surveys over the eastern part of the Cornubian platform / Geological Society, London, Special Publications, 14:119-124, doi:10.1144/GSL.SP.1984.014.01.11 --- Robert M. Shackleton: Thin-skinned tectonics, basement control and the Variscan front / Geological Society, London, Special Publications, 14:125-129, doi:10.1144/GSL.SP.1984.014.01.12 --- Russell S. Arthurton: The Ribblesdale fold belt, NW England—a Dinantian-early Namurian dextral shear zone / Geological Society, London, Special Publications, 14:131-138, doi:10.1144/GSL.SP.1984.014.01.13 --- M. F. Critchley: Variscan tectonics of the Alston block, northern England / Geological Society, London, Special Publications, 14:139-146, doi:10.1144/GSL.SP.1984.014.01.14 --- Ireland --- David J. Sanderson: Structural variation across the northern margin of the Variscides in NW Europe / Geological Society, London, Special Publications, 14:149-165, doi:10.1144/GSL.SP.1984.014.01.15 --- M. A. Cooper, D. Collins, M. Ford, F. X. Murphy, and P. M. Trayner: Structural style, shortening estimates and the thrust front of the Irish Variscides / Geological Society, London, Special Publications, 14:167-175, doi:10.1144/GSL.SP.1984.014.01.16 --- M. D. Max and J. P. Lefort: Does the Variscan front in Ireland follow a dextral shear zone? / Geological Society, London, Special Publications, 14:177-183, doi:10.1144/GSL.SP.1984.014.01.17 --- D. W. Coller: Variscan structures in the Upper Palaeozoic rocks of west central Ireland / Geological Society, London, Special Publications, 14:185-194, doi:10.1144/GSL.SP.1984.014.01.18 --- North America --- N. Rast: The Alleghenian orogeny in eastern North America / Geological Society, London, Special Publications, 14:197-217, doi:10.1144/GSL.SP.1984.014.01.19 --- Jean-Pierre Lefort and Richard T. Haworth: Geophysical evidence for the extension of the Variscan front on to the Canadian continental margin: geodynamic and palaeogeographic consequences / Geological Society, London, Special Publications, 14:219-231, doi:10.1144/GSL.SP.1984.014.01.20 --- Sharon Mosher and Nicholas Rast: The deformation and metamorphism of Carboniferous rocks in Maritime Canada and New England / Geological Society, London, Special Publications, 14:233-243, doi:10.1144/GSL.SP.1984.014.01.21 --- R. P. Wintsch and J.-P. Lefort: A clockwise rotation of Variscan strain orientation in SE New England and regional implications / Geological Society, London, Special Publications, 14:245-251, doi:10.1144/GSL.SP.1984.014.01.22 --- J. A. Brewer: Clues to the deep structure of the European Variscides from crustal seismic profiling in North America / Geological Society, London, Special Publications, 14:253-263, doi:10.1144/GSL.SP.1984.014.01.23

Beschreibung / Inhaltsverzeichnis: Recent research developments / Geological Society, London, Special Publications, 17:xi-xii, doi:10.1144/GSL.SP.1984.017.01.01 --- A. H. F. Robertson and J. E. Dixon: Introduction: aspects of the geological evolution of the Eastern Mediterranean / Geological Society, London, Special Publications, 17:1-74, doi:10.1144/GSL.SP.1984.017.01.02 --- 1. Palaeotethys --- Editor’s introduction / Geological Society, London, Special Publications, 17:75-76, doi:10.1144/GSL.SP.1984.017.01.03 --- A. M. C. Şengör, Y. Yılmaz, and O. Sungurlu: Tectonics of the Mediterranean Cimmerides: nature and evolution of the western termination of Palaeo-Tethys / Geological Society, London, Special Publications, 17:77-112, doi:10.1144/GSL.SP.1984.017.01.04 --- Olivier Monod and Ergün Akay: Evidence for a Late Triassic-Early Jurassic orogenic event in the Taurides / Geological Society, London, Special Publications, 17:113-122, doi:10.1144/GSL.SP.1984.017.01.05 --- I. E. Kerey: Facies and tectonic setting of the Upper Carboniferous rocks of Northwestern Turkey / Geological Society, London, Special Publications, 17:123-128, doi:10.1144/GSL.SP.1984.017.01.06 --- E. Demirtaşh: Stratigraphic evidence of Variscan and early Alpine tectonics in Southern Turkey / Geological Society, London, Special Publications, 17:129-145, doi:10.1144/GSL.SP.1984.017.01.07 --- 2. Neoththys --- Levant and North African offshore: Editor’s introduction / Geological Society, London, Special Publications, 17:147-149, doi:10.1144/GSL.SP.1984.017.01.08 --- M. Delaune-Mayere: Evolution of a Mesozoic passive continental margin: Baër-Bassit (NW Syria) / Geological Society, London, Special Publications, 17:151-159, doi:10.1144/GSL.SP.1984.017.01.09 --- G. Sestini: Tectonic and sedimentary history of the NE African margin (Egypt—Libya) / Geological Society, London, Special Publications, 17:161-175, doi:10.1144/GSL.SP.1984.017.01.10 --- Gdaliahu Gvirtzman and Tuvia Weissbrod: The Hercynian Geanticline of Helez and the Late Palaeozoic history of the Levant / Geological Society, London, Special Publications, 17:177-186, doi:10.1144/GSL.SP.1984.017.01.11 --- Z. Garfunkel and B. Derin: Permian-early Mesozoic tectonism and continental margin formation in Israel and its implications for the history of the Eastern Mediterranean / Geological Society, London, Special Publications, 17:187-201, doi:10.1144/GSL.SP.1984.017.01.12 --- Yehezkeel Druckman: Evidence for Early-Middle Triassic faulting and possible rifting from the Helez Deep Borehole in the coastal plain of Israel / Geological Society, London, Special Publications, 17:203-212, doi:10.1144/GSL.SP.1984.017.01.13 --- Abdulkader M. Abed: Emergence of Wadi Mujib (Central Jordan) during Lower Cenomanian time and its regional tectonic implications / Geological Society, London, Special Publications, 17:213-216, doi:10.1144/GSL.SP.1984.017.01.14 --- F. Hirsch: The Arabian sub-plate during the Mesozoic / Geological Society, London, Special Publications, 17:217-223, doi:10.1144/GSL.SP.1984.017.01.15 --- Michel Delaloye and Jean-Jacques Wagner: Ophiolites and volcanic activity near the western edge of the Arabian plate / Geological Society, London, Special Publications, 17:225-233, doi:10.1144/GSL.SP.1984.017.01.16 --- 3. Neotethys: Turkey --- Editor’s introduction / Geological Society, London, Special Publications, 17:235-240, doi:10.1144/GSL.SP.1984.017.01.17 --- A. Poisson: The extension of the Ionian trough into southwestern Turkey / Geological Society, London, Special Publications, 17:241-249, doi:10.1144/GSL.SP.1984.017.01.18 --- A. H. F. Robertson and N. H. Woodcock: The SW segment of the Antalya Complex, Turkey as a Mesozoic-Tertiary Tethyan continental margin / Geological Society, London, Special Publications, 17:251-271, doi:10.1144/GSL.SP.1984.017.01.19 --- J. W. F. Waldron: Structural history of the Antalya Complex in the ‘Isparta angle’, Southwest Turkey / Geological Society, London, Special Publications, 17:273-286, doi:10.1144/GSL.SP.1984.017.01.20 --- A. B. Hayward: Miocene clastic sedimentation related to the emplacement of the Lycian Nappes and the Antalya Complex, S.W. Turkey / Geological Society, London, Special Publications, 17:287-300, doi:10.1144/GSL.SP.1984.017.01.21 --- Hubert Whitechurch, Thierry Juteau, and Raymond Montigny: Role of the Eastern Mediterranean ophiolites (Turkey, Syria, Cyprus) in the history of the Neo-Tethys / Geological Society, London, Special Publications, 17:301-317, doi:10.1144/GSL.SP.1984.017.01.22 --- Ingrid Reuber: Mylonitic ductile shear zones within tectonites and cumulates as evidence for an oceanic transform fault in the Antalya ophiolite, S.W. Turkey / Geological Society, London, Special Publications, 17:319-334, doi:10.1144/GSL.SP.1984.017.01.23 --- Pınar O. Yılmaz: Fossil and K-Ar data for the age of the Antalya complex, S W Turkey / Geological Society, London, Special Publications, 17:335-347, doi:10.1144/GSL.SP.1984.017.01.24 --- L. E. Ricou, J. Marcoux, and H. Whitechurch: The Mesozoic organization of the Taurides: one or several ocean basins? / Geological Society, London, Special Publications, 17:349-359, doi:10.1144/GSL.SP.1984.017.01.25 --- A. Michard, H. Whitechurch, L. E. Ricou, R. Montigny, and E. Yazgan: Tauric subduction (Malatya-Elazıǧ provinces) and its bearing on tectonics of the Tethyan realm in Turkey / Geological Society, London, Special Publications, 17:361-373, doi:10.1144/GSL.SP.1984.017.01.26 --- G. Aktaş and A. H. F. Robertson: The Maden Complex, SE Turkey: evolution of a Neotethyan active margin / Geological Society, London, Special Publications, 17:375-402, doi:10.1144/GSL.SP.1984.017.01.27 --- Cahit Helvaci and William L. Griffin: Rb-Sr geochronology of the Bitlis Massif, Avnik (Bingöl) area, S.E. Turkey / Geological Society, London, Special Publications, 17:403-413, doi:10.1144/GSL.SP.1984.017.01.28 --- Ömer T. Akıncı: The Eastern Pontide volcano-sedimentary belt and associated massive sulphide deposits / Geological Society, London, Special Publications, 17:415-428, doi:10.1144/GSL.SP.1984.017.01.29 --- A. I. Okay and N. Özgül: HP/LT metamorphism and the structure of the Alanya Massif, Southern Turkey: an allochthonous composite tectonic sheet / Geological Society, London, Special Publications, 17:429-439, doi:10.1144/GSL.SP.1984.017.01.30 --- Teoman N. Norman: The role of the Ankara Melange in the development of Anatolia (Turkey) / Geological Society, London, Special Publications, 17:441-447, doi:10.1144/GSL.SP.1984.017.01.31 --- Ayla Tankut: Basic and ultrabasic rocks from the Ankara Melange, Turkey / Geological Society, London, Special Publications, 17:449-454, doi:10.1144/GSL.SP.1984.017.01.32 --- A. I. Okay: Distribution and characteristics of the north-west Turkish blueschists / Geological Society, London, Special Publications, 17:455-466, doi:10.1144/GSL.SP.1984.017.01.33 --- N. Görür, F.Y. Oktay, İ. Seymen, and A. M. C. Şengör: Palaeotectonic evolution of the Tuzgölü basin complex, Central Turkey: sedimentary record of a Neo-Tethyan closure / Geological Society, London, Special Publications, 17:467-482, doi:10.1144/GSL.SP.1984.017.01.34 --- J. P. Lauer: Geodynamic evolution of Turkey and Cyprus based on palaeomagnetic data / Geological Society, London, Special Publications, 17:483-491, doi:10.1144/GSL.SP.1984.017.01.35 --- 4. Neotethys: Greece and the Balkans --- Editor’s introduction / Geological Society, London, Special Publications, 17:493-498, doi:10.1144/GSL.SP.1984.017.01.36 --- Robert Hall, M. G. Audley-Charles, and D. J. Carter: The significance of Crete for the evolution of the Eastern Mediterranean / Geological Society, London, Special Publications, 17:499-516, doi:10.1144/GSL.SP.1984.017.01.37 --- Michel Bonneau: Correlation of the Hellenide nappes in the south-east Aegean and their tectonic reconstruction / Geological Society, London, Special Publications, 17:517-527, doi:10.1144/GSL.SP.1984.017.01.38 --- M. Okrusch, P. Richter, and G. Katsikatsos: High-pressure rocks of Samos, Greece / Geological Society, London, Special Publications, 17:529-536, doi:10.1144/GSL.SP.1984.017.01.39 --- Christos G. Katagas: High pressure metamorphism in Ghiaros Island, Cyclades, Greece / Geological Society, London, Special Publications, 17:537-544, doi:10.1144/GSL.SP.1984.017.01.40 --- John Ridley: The significance of deformation associated with blueschist facies metamorphism on the Aegean island of Syros / Geological Society, London, Special Publications, 17:545-550, doi:10.1144/GSL.SP.1984.017.01.41 --- Dimitrios J. Papanikolaou: The three metamorphic belts of the Hellenides: a review and a kinematic interpretation / Geological Society, London, Special Publications, 17:551-561, doi:10.1144/GSL.SP.1984.017.01.42 --- Georgia Pe-Piper and David J. W. Piper: Tectonic setting of the Mesozoic Pindos basin of the Peloponnese, Greece / Geological Society, London, Special Publications, 17:563-567, doi:10.1144/GSL.SP.1984.017.01.43 --- Alan E. S. Kemp and Andrew M. McCaig: Origins and significance of rocks in an imbricate thrust zone beneath the Pindos ophiolite, northwestern Greece / Geological Society, London, Special Publications, 17:569-580, doi:10.1144/GSL.SP.1984.017.01.44 --- D. Mountrakis: Structural evolution of the Pelagonian Zone in Northwestern Macedonia, Greece / Geological Society, London, Special Publications, 17:581-590, doi:10.1144/GSL.SP.1984.017.01.45 --- Volker Jacobshagen and Eckard Wallbrecher: Pre-Neogene nappe structure and metamorphism of the North Sporades and the southern Pelion peninsula / Geological Society, London, Special Publications, 17:591-602, doi:10.1144/GSL.SP.1984.017.01.46 --- J. E. Dixon and S. Dimitriadis: Metamorphosed ophiolitic rocks from the Serbo-Macedonian Massif, near Lake Volvi, North-east Greece / Geological Society, London, Special Publications, 17:603-618, doi:10.1144/GSL.SP.1984.017.01.47 --- J. G. Spray, J. Bébien, D. C. Rex, and J. C. Roddick: Age constraints on the igneous and metamorphic evolution of the Hellenic-Dinaric ophiolites / Geological Society, London, Special Publications, 17:619-627, doi:10.1144/GSL.SP.1984.017.01.48 --- A. G. Smith and J. G. Spray: A half-ridge transform model for the Hellenic-Dinaric ophiolites / Geological Society, London, Special Publications, 17:629-644, doi:10.1144/GSL.SP.1984.017.01.49 --- Emö Márton: Tectonic implications of palaeomagnetic results for the Carpatho-Balkan and adjacent areas / Geological Society, London, Special Publications, 17:645-654, doi:10.1144/GSL.SP.1984.017.01.50 --- 5. Neogene --- Editor’s introduction / Geological Society, London, Special Publications, 17:655-658, doi:10.1144/GSL.SP.1984.017.01.51 --- Fritz F. Steininger and Fred Rögl: Paleogeography and palinspastic reconstruction of the Neogene of the Mediterranean and Paratethys / Geological Society, London, Special Publications, 17:659-668, doi:10.1144/GSL.SP.1984.017.01.52 --- Catherine Kissel, Carlo Laj, and Marc Jamet: Palaeomagnetic evidence of Miocene and Pliocene rotational deformations of the Aegean Area / Geological Society, London, Special Publications, 17:669-679, doi:10.1144/GSL.SP.1984.017.01.53 --- D. Kondopoulou and J. P. Lauer: Palaeomagnetic data from Tertiary units of the north Aegean zone / Geological Society, London, Special Publications, 17:681-686, doi:10.1144/GSL.SP.1984.017.01.54 --- M. Fytikas, F. Innocenti, P. Manetti, A. Peccerillo, R. Mazzuoli, and L. Villari: Tertiary to Quaternary evolution of volcanism in the Aegean region / Geological Society, London, Special Publications, 17:687-699, doi:10.1144/GSL.SP.1984.017.01.55 --- M. L. Myrianthis: Graben formation and associated seismicity in the Gulf of Korinth (Central Greece) / Geological Society, London, Special Publications, 17:701-707, doi:10.1144/GSL.SP.1984.017.01.56 --- Nicolas Lybéris: Tectonic evolution of the North Aegean trough / Geological Society, London, Special Publications, 17:709-725, doi:10.1144/GSL.SP.1984.017.01.57 --- Xavier Le Pichon, Nicolas Lybéris, and Francis Alvarez: Subsidence history of the North Aegean Trough / Geological Society, London, Special Publications, 17:727-741, doi:10.1144/GSL.SP.1984.017.01.58 --- James Jackson and Dan McKenzie: Rotational mechanisms of active deformation in Greece and Iran / Geological Society, London, Special Publications, 17:743-754, doi:10.1144/GSL.SP.1984.017.01.59 --- John Ridley: Listric normal faulting and the reconstruction of the synmetamorphic structural pile of the Cyclades / Geological Society, London, Special Publications, 17:755-761, doi:10.1144/GSL.SP.1984.017.01.60 --- A. Aykut Barka and Paul L. Hancock: Neotectonic deformation patterns in the convex-northwards arc of the North Anatolian fault zone / Geological Society, London, Special Publications, 17:763-774, doi:10.1144/GSL.SP.1984.017.01.61 --- A. M. Quennell: The Western Arabia rift system / Geological Society, London, Special Publications, 17:775-788, doi:10.1144/GSL.SP.1984.017.01.62 --- S. Jasko: On the Neogene development of the Eastern Mediterranean basins / Geological Society, London, Special Publications, 17:789-794, doi:10.1144/GSL.SP.1984.017.01.63 --- P. Chorianopoulou, A. Galeos, and Ch. Ioakim: Pliocene lacustrine sediments in the volcanic succession of Almopias, Macedonia, Greece / Geological Society, London, Special Publications, 17:795-806, doi:10.1144/GSL.SP.1984.017.01.64 --- A. Cramp, M. B. Collins, S. J. Wakefield, and F. T. Banner: Sapropelic layers in the NW Aegean Sea / Geological Society, London, Special Publications, 17:807-813, doi:10.1144/GSL.SP.1984.017.01.65 --- E. D. Chiotis: A Middle Miocene thermal event in northern Greece confirmed by coalification measurements / Geological Society, London, Special Publications, 17:815-818, doi:10.1144/GSL.SP.1984.017.01.66 --- Frank H. Fabricius: Neogene to Quaternary geodynamics of the area of the Ionian Sea and surrounding land masses / Geological Society, London, Special Publications, 17:819-824, doi:10.1144/GSL.SP.1984.017.01.67

Beschreibung / Inhaltsverzeichnis: This volume contains papers covering the theory of nonlinear PDEs and the related topics which have been recently developed in Japan

Beschreibung / Inhaltsverzeichnis: Contains papers contributed to the International Workshop on Stochastic Analysis held July 1-7, 1982 at Katata; and to the International Symposium on Stochastic Analysis held July 8-10 at Kyoto. - Held under the auspices of the Taniguchi Foundation

Beschreibung / Inhaltsverzeichnis: The Mineralogical Society of America on November 8 and 9, 1969, celebrated the fiftieth anniversary of its founding in Atlantic City, New Jersey. The celebration included the presentation of three special symposia, with Harry H. Hess of Princeton University as chairman of the symposia committee. He personally organized the sessions for a symposium on the Mineralogy and Petrology of the Upper Mantle. A symposium on Sulfides was organized by Gunnar Kullerud of the Geophysical Laboratory, and a symposium on the Mineralogy and Geochemistry of Non-Marine Evaporites was organized by Blair F. Jones of the U. S. Geological Survey.

Beschreibung / Inhaltsverzeichnis: The results of resistance tests in level ice and broken ice channels are presented for two models of the WTGB 140-fticebreaker at scales of 1:10 and 1:24, respectively. No scale effect on the resistance in level ice could be detected between the two models. From the test results an empirical predictor equation for the full scale ice resistance is derived. Predicted resistance is compared against, and found to be 25 to 40% larger than, available full-scale values estimated from thrust measurements during full-scale trials of the Great Lakes icebreaker Katmai Bay.

Beschreibung / Inhaltsverzeichnis: Investigations of the in situ complex dielectric constant of sea ice were made using time-domain spectroscopy. It was found that (1) for sea ice with a preferred horizontal crystal c-axis alignment, the anisotropy of polarizing properties of the ice increased with depth, (2) brine inclusion conductivity increased with decreasing temperature down to about -8 C, at which point the conductivity decreased with decreasing temperature, (3) the DC conductivity of sea ice increased with increasing brine volume, (4) the real part of the complex dielectric constant is strongly dependent upon brine volume but less dependent upon the brine inclusion orientation, (5) the imaginary part of the complex dielectric constant was strongly dependent upon brine inclusion orientation but much less dependent upon brine volume. Because the electromagnetic (EM) properties of sea ice are dependent upon the physical state of the ice, which is continually changing, it appears that only trends in the relationships between the EM properties of natural sea ice and its brine volume and brine inclusion microstructure can be established.

Beschreibung / Inhaltsverzeichnis: Ice problems developed in the Sault Ste. Marie, Michigan, portion of the St. Marys River because of winter navigation. Passing ships and natural influences moved ice from Soo Harbor into Little Rapids Cut in sufficient quantities to jam, cause high water in the harbor, and prevent further ship passage. After physical model and engineering studies, two ice booms with a total span of 1375 ft (419 m) with a 250-ft (76-m) navigation opening between were installed at the head of Little Rapids Cut in 1975. A modest field study program on the booms was conducted for the ensuring four winters to determine ice and boom interaction and the effects of ship passages on the system. Forces on some anchors were recorded and supplemental data were taken by local personnel. Several reports have been written about the booms' early operations. This paper presents four-year summary of the main effects of the booms on ice and ship interaction and vice versa. Throughout the four winter seasons, the small quantities of ice lost over and between the booms were manageable. Ships usually passed through the boom without influencing the boom force levels, but at time they brought about large changes. One boom needed strengthening, and artificial islands were added for upstream ice stability. Coast Guard icebreakers were also a necessary part of winter navigation in this area.

Beschreibung / Inhaltsverzeichnis: An expression relating aerosol growth to cold environmental conditions was developed. This was accomplished by solving the diffusion equation with the method of Laplace transformation. The series solution was expressed in terms of the dimensionless parameters K (ratio of vapor density over droplet surface to droplet density), ω (ratio of environmental vapor density at time zero to vapor density over droplet surface), and dimensionless time τ (ratio of product of diffusion coefficient D and time t to square of initial radius of condensation nucleus). To take into account the variation of the vapor density over the surface of an acidic condensation nucleus due to the continuous dilution of the droplet, the solution was obtained by assuming various levels of constant vapor concentration. The final expression [R/R sub o - 1 = 2.4917 x 10 to the minus 18th power) exp(0.0737 θ) (P sub RHS/25) x (100-P sub RHS) τ to the 0.9890 powder] can be used to compute the value of R once the values of initial radius R sub o, relative humidity P sub RH, percent of relative humidity at the droplet surface P sub RHS, and environmental temperature θ are given.

Beschreibung / Inhaltsverzeichnis: Diatom species composition and relative abundances were determined for ice cores obtained from Weddell Sea pack ice during the October-November 1981 Weddell Polynya Expedition (WEPOLEX). Ice thickness and salinity indicate that the ice was less than one year old. The predominant ice type (70%) was frazil, which has the capacity to mechanically incorporate biological material through nucleation and scavenging. Diatoms were found throughout the length of the cores. Species showed down-core fluctuations in abundance that appeared to be correlated with changes in ice type. Pennate forms were more abundant than centrics, the average ratio being 16:1. Diatom frustules with intact organic material were more abundant (5 billion cells/liter). Differences in species abundances are attributed initially to incorporation of algal cells from a temporally changing water column and subsequently to diatom reproduction within the ice. Scanning electron micrographs illustrating the morphologic characteristics of the predominant species are included.

Beschreibung / Inhaltsverzeichnis: Experiments were conducted in CRREL's refrigerated flume facility to examine the two-dimensional force distribution of a floating, fragmented ice cover restrained by a boom in a simulated river channel. To determine the force distribution, a vertically walled channel, instrumented for measuring normal and tangential forces, and an instrumented restraining boom were installed in a 40.0- by 1.3-m flume. Two sizes of polyethylene blocks and two similar sizes of fresh-water ice blocks were tested using water velocities ranging from 10 to 30 cm/s. The forces measured at the instrumented boom leveled off with increasing cover length. The contribution of the increasing shear forces developed along theshorelines to this leveling off in the data was clearly evident. The shear coefficients of the polyethylene blocks averaged 0.43, and the freshwater ice averaged 0.044. The normal force measured along the instrumented shoreline could not be related simply by a K coefficient to the longitudinal force; another expression was required, with a term being a function of the cover thickness and independent of the undercover shear stress or cover length. By adding this term, good agreement was then found between the measured and predicted values of the boom forces and the shoreline normal and shear forces

Beschreibung / Inhaltsverzeichnis: A small-scale experimental study was conducted to characterize the magnitude and nature of ice forces during continuous crushing of ice against a rigid, vertical, cylindrical structure. The diameter of the structure was varied from 50 to 500 mm, the relative velocity from 10 to 210 mm/s, and the ice thickness from 50 to 80 mm. The ice tended to fail repetitively, with the frequency of failure termed the characteristic frequency. The characteristic frequency varied linearly with velocity and to a small extent with structure diameter. The size of the damage zone was 10 to 50% of the ice thickness, with an average value of 30%. The maximum and mean normalized ice forces were strongly dependent on the aspect ratio (structure diameter/ice thickness). The forces increased significantly with decreasing aspect ratio, but were constant for large aspect ratios. The maximum normalized forces appeared to be independent of strain rate. The effect of velocity on the normalized ice forces depended on structure diameter. The mean effective pressure or specific energy of ice crushing depended on both aspect ratio and ice-structure relative velocity. The energy required to crush the ice for the one failure cycle was obtained from the ice force records for each test, and was compared to the energy calculated from an idealized sawtooth shape for the force record, the maximum force, velocity and characteristic frequency data. Originator - supplied keywords included: Cold regions, Cold regions construction, Cylindrical test structures, Ice, Ice crushing, Ice forces, and Test facilities.

Beschreibung / Inhaltsverzeichnis: Orwell Lake, in west-central Minnesota, is a flood-control, water-management reservoir first impounded in 1953. Subsequent erosion of the shoreline and a lack of knowledge of slope erosion processes in this region prompted this study to identify and quantify the processes there. The processes were measured at selected sites between June 1980 and June 1983. Erosion of the banks is primarily caused by three processes: rain, frost thaw, and waves. The first two processes tend to move sediment to the base of the steep slopes, forming 4 relatively gentle surface of accumulation. Wave action then tends to move this sediment into the lake. Analysis of the data collected over three years has confirmed that wave action is the dominant erosion process, providing almost 77% of the erosion during the 1981-82 study year. During the 1981 high pool level, 2,089 Mg of sediment, mostly colluvium, was removed from the lower slopes by wave action striking the 1.62 km of eroding shoreline. More than 4,300 Mg was eroded by waves accompanying the higher pool levels of 1982., During years in which the pool level does not exceed 325.5 m in elevation, the colluvium slope builds up at the expense of the steeper slope. But during successive years with higher pool levels, the resulting thin colluvium is quickly eroded. Erosion of the primary sediment, a compact till, then occurs, forming the S typical nearly vertical banks. In winter the upland surface adjacent to the lake freezes to a depth of between 1 and 2 m, depending on the surface temperature, the mow cover, and the distance from exposed banks. In late winter soil aggregates, released by the sublimation of interstitial ice within the banks, begin to accumulate at the base of the slopes, often veneering snowbanks there. Once thaw begins, slab failure of bank sediment is followed by mudflows and earthflows. Thaw failure at Orwell Lake in the winter of 1981-82 accounted for over 20% of the erosion; in the spring of 1982, 824 Mg was eroded by this process and 746 Mg the following spring. Such slope failure is most intense along north-facing banks and considerably less intense on south-facing banks, where more effective desiccation and sublimation reduce the soil moisture content. Summer rainfall is responsible for the remaining 3% of the total erosion, amounting to 102 Mg in 1981 and 208 Mg in 1982. Because the banks are steep and relatively short, rainwash is infrequent; rainsplash is the most consistent process during the summer, but the infrequent storms during which rainwash occurscause greater total erosion. Erosion by rain has increased in each of the past three summers, largely because of increased precipitation. Infrequent massive slope failures (slumps) have occurred at the east end of the lake where a buried clay rich unit is stratigraphically and topographically positioned to favor such failures. Drought years followed by heavy spring rains probably will result in additional slope failures of this type at the east end. Unless changes are made, the banks at Orwell Lake will continue to recede. Restriction of the pool level to less than 325.5-m elevation is the least expensive solution to the problem.

Beschreibung / Inhaltsverzeichnis: Abstract: Stable pressure systems over interior Alaska, sometimes produce prolonged, extreme (below -40°C) cold spells at the surface. The meteorological conditions responsible for two such cold spells are discussed in detail in Appendix A, where it is shown that the rate of radiative cooling of the air is enhanced by suspended ice crystals which are themselves a result of the initial cooling. Radiation fogs formed during the onset of cold spells are generally of short duration because the air soon becomes desiccated. These fogs consist of supercooled water droplets until the air temperature goes below the "spontaneous freezing point" for water droplets (about -40°C); the fog then becomes an ice crystal fog, or simply "ice fog. " During the cooling cycle water is gradually condensed out of the air until the droplets freeze. At this point there is a sharp, discontinuous decrease in the saturation vapor pressure of the air because it must be reckoned over ice rather than over water. The polluted air over Fairbanks allows droplets to begin freezing at the relatively high temperature of -35°C. Between -35 and -40°C the amount of water vapor condensed by freezing of super cooled water droplets is 3 to 5 times greater than the amount condensed by 1°C of cooling at these temperatures. This results in rapid and widespread formation of ice fog (Appendix B) which persists in the Fairbanks area as long as the cold spell lasts. The persistence of Fairbanks ice fog depends on a continual source of moisture (4.1 x 10^6 kg H20 per day) from human activities within the fog. Ice fog crystals are an order of magnitude smaller than diamond dust or cirrus cloud crystals, which in turn are an order of magnitude smaller than common snow crystals (0.01, 0.1 and 1 to 5 mm respectively). The difference in size are shown to result from the differences in cooling rates over five orders of magnitude. Most of the ice fog crystals have settling rates which are smaller than the upward velocity of air over a city center. The upward air movement is caused by convection cells driven by the 6°C "heat island" over Fairbanks. This causes a reduced precipitation rate which permits the density of ice fog in the center center to be three times greater than that in the outlying areas. The inversions which occur during cold spells over Fairbanks begin at ground level and are among the strongest and most persistent in the world. They are three times stronger than those in the inversion layer over Los Angeles. Thus, the low-lying air over Fairbanks stagnates and becomes effectively decoupled from the atmosphere above, permitting high concentrations all pollutants. The combustion of fuel oil, gasoline and coal provides daily inputs of 4.1 x 10^6 kg CO2, 8.6 x 10^3 kg SO2, and 60, 46 and 20 kg of Pb, Br, and Cl respectively, into a lens-like layer of air resting on the surface with a total volume less than 3 x 10^9 m^3. The air pollution over Fairbanks during cold spells is further worsened, because the mechanisms for cleaning the air are virtually eliminated while all activities which pollute the air are increased.

Beschreibung / Inhaltsverzeichnis: Abstract: Experiments were carried out near Thule, Greenland, on the correlation between the physical properties and internal structure of snow. About 150 snow samples obtained to 26 m depth were measured for elastic modulus, air permeability, unconfined compressive strength, static compression and creep. The observed density profile curve deviated from the theoretical curve at a depth of 10 m. and density of 0.52 g/cm^3, a value almost equivalent to the limiting density obtainable by simple mechanical packing. Therefore, further densification must proceed through plastic flow in grains. A similar critical depth was observed in the vertical distribution of Young's modulus. A positive correlation was found between Young's modulus and density, and an inverse correlation between average grain diameter and Young's modulus or density. There were reciprocal correlations between air permeability and density or unconfined compressive strength, and between the number of grains and their average diameters. Kozeny's constant of Greenland snow was obtained from air permeability values and the length of peripheries of cross sections of grains. To demonstrate the change of internal structure of snow due to densification, static compression tests of snow cylinders were conducted, and thin sections of snow texture were compared before and after compression. Creep curves of snow cylinders were analyzed using Nutting's formula and are discussed in connection with change of internal structure. Basal slip, buckling, cell or sub-grain formation, recrystallization and grain boundary migration occurring during plastic deformation of snow texture were observed by static compression of thin section snow under the microscope.

Beschreibung / Inhaltsverzeichnis: A field guide to the wild flowers of western Canada and the adjoining Great Plains states of the United States, including illustrations of nearly 400 species.