Download or read book Glacial to Holocene Development of Baffin Bay Sedimentary Systems Processes Provenances and Patterns written by Emmanuel Okuma and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The enclosed work assesses the impacts of ocean-ice interactions on the sedimentary system in Baffin Bay, a narrow oceanic basin between Greenland and Canada, which was partly surrounded by three major ice sheets during glacial times. Using proxy data from sedimentary archives, a reconstruction of the last deglaciation to Holocene sediment and ice margin dynamics in northern and western Baffin Bay is accomplished. In addition, an overall Baffin Bay-wide assessment of the development of sedimentation patterns linked to ice sheet dynamics since the Last Glacial Maximum is provided.

Download or read book Glacial Marine Sedimentation written by Bruce F. Molnia and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 843 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume of 18 papers describes the glacial-marine sedimentary environment in a variety of temporal and spatial settings. The volume's primary emphasis is the characteri zation of Quaternary glacial-marine sedimentation to show (1) the significant differences that exist between glacial marine environments in different geographic settings and (2) their resulting glacial-marine deposits and facies. Addi tionally, papers describing ancient glacial-marine environ ments are also presented to illustrate lithified analogs of the Quaternary deposits. With the Doctrine of Uniformitarianism in mind (the present is the key to the past), it is hoped that this volume will serve to expand the horizons of geologists working on the rock record, especially those whose primary criteria for recognition of ancient glacial-marine environments is the presence of dropstones in a finer-grained matrix. As the papers presented here show, diamictite is only one of many types of deposits that form in the glacial-marine sedimentary environment. Papers presented in this volume examine the Quaternary glacia1-marine sedimentary picture in subarctic Alaska, Antarctica, the Arctic Ocean, the Kane Basin, Baffin Island, the Puget-Fraser Lowland of Washington and British Columbia, and the North Atlantic Ocean. Ancient glacia1-marine depos its described are the Neogene Yakataga Formation of southern Alaska, the Late Paleozoic Dwyka Formation of the Karoo Basin of South Africa, and the Precambrian Mineral Fork Formation of Utah. For continuity, a paper summar1z1ng the temporal and spatial occurrences of glacial-marine deposits is also presented.

Download or read book A Practical Guide to the Study of Glacial Sediments written by David J. A. Evans and published by Routledge. This book was released on 2014-04-23 with total page 297 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sediments are the most valuable form of physical evidence for past Earth surface processes. They have the potential to build up an archive of events and provide a window into the past. Through careful examination of sediments the shifting patterns of surface processes across space and time are revealed, allowing us to reconstruct past environments and environmental change. A Practical Guide to the Study of Glacial Sediments is a guide to the standard techniques employed to read the sedimentary record of former glaciers and ice sheets. It demonstrates that the often complex and fragmentary glacial sedimentary record can, when examined systematically and rationally, provide detailed insights into former environments and climates in places where no other evidence is available. The complementary techniques covered in this book include: facies description, grain size analysis, clast form assessment, clast macrofabric analysis, micromorphology, particle lithology and assessment of engineering properties. They yield consistent and meaningful results in a range of glacial depositional environments throughout the world, from the high Arctic to the Himalayas. A Practical Guide to the Study of Glacial Sediments provides students and researchers with a clear and accessible guide to recording and interpreting glacial successions wherever the location.

Download or read book Glacimarine Environments written by J. A. Dowdeswell and published by . This book was released on 1990 with total page 440 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume examines the processes responsible for sedimentation in modern glaciomarine environments, and how such modern studies can be used as analogues in the interpretation of ancient glaciomarine sequences. Sediments released from glaciers grounded in tidewater, floating ice shelves, ice tongues, icebergs and sea ice form complex sequences governed by glaciological, oceanographic, sedimentary and biogenic controls. Ten per cent of the world's oceans and epicontinental seas contain such active glacimarine environments, but during Cenozoic glacial periods this area was doubled. This book will, therefore, be of relevance to all scientists concerned with high and middle latitude marine environments. The early chapters are concerned largely with processes of sedimentation in modern glacimarine environments; examples are drawn from Alaska, the Canadian Arctic, Svalbard and Antarctica. Studies of ancient sequences, both Cenozoic and pre-Cenozoic, from the Barents Sea, Greenland, Sweden, Alaska and the northwest European continental shelf, form the latter part of the book.

Download or read book The Sedimentology of Holocene Prydz Bay written by Dennis Franklin and published by . This book was released on 1997 with total page 518 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Impact of Melt Water Controlled Material Flux on the Sedimentation in the Western Baffin Bay and the Circum Greenland Marginal Seas written by Johanna Hingst and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Arctic is highly sensitive to present climate change and is known to be affected by higher degrees of warming than any other region. Since the Arctic is strongly linked to the global climate system by atmospheric and oceanic circulations, it is crucial to learn more about present and possible future environmental changes in the region. Ice sheets, ice caps, and glaciers play an important role in the Arctic system. To learn more about their sensitivity to climate change, the reconstruction of past ice sheet deglaciation patterns is a helpful tool. An interesting research area for ice sheet reconstruction is the Baffin Bay, which is located between Greenland and the Canadian Arctic and connects the Arctic Ocean with the Labrador Sea. Provenance studies on marine sediments from western Baffin Bay can provide insight into past changes in sediment supply and transport pathways and thus give valuable information about regional ice sheet dynamics and palaeoceanographic conditions. This study analyzed the radiogenic Sr, Nd, and Pb isotope composition of the detrital sediment fraction of four sediment cores from western and northern Baffin Bay and the Canadian Arctic Archipelago. Overall, the data of the sediment cores provide new details on the late Pleistocene and Holocene deglaciation history of the Laurentide Ice Sheet and Innuitian Ice Sheet and related changes in sediment transport processes in western and northern Baffin Bay. Further, the identification of changing sediment provenance of detrital material in marine sediment cores from northern Baffin Bay and Barrow Strait helped to determine better the timing of the opening of these Arctic gateways and the inflow of Arctic waters into Baffin Bay.

Download or read book Holocene Sea level Climate and Estuarine Stratrigraphy of Baffin Bay Texas written by Daniel North Livsey and published by . This book was released on 2015 with total page 125 pages. Available in PDF, EPUB and Kindle. Book excerpt: Within Baffin Bay, five flooding surfaces making periods of abrupt environmental change, between 1.1--1.0 ka, 2.7--2.1 ka, 3.8--3.0 ka, 5.2--4.9 ka, and 6.5--5.7 ka occur through a time-period of ever decreasing rates of relative sea-level rise and within error of periods of drying in southern Texas at ca. 1.0 ka, 2.6 ka, 3.4 ka, 4.8 ka, and 5.5 ka (Chapter 4). I hypothesize that these flooding surfaces, occurring when sea level in the Gulf of Mexico was rising

Download or read book Till written by David J. A. Evans and published by Wiley-Blackwell. This book was released on 2017-11-08 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt: Provides the first comprehensive review of the current state of the science on tills It is critical that glacial scientists continue to refine their interpretations of ancient archives of subglacial processes, specifically those represented by tills and associated deposits, as they form the most widespread and accessible record of processes at the ice-bed interface. Unfortunately, despite a long history of investigation and a lexicon of process-based nomenclature, glacial sedimentologists have yet to reach a consensus on diagnostic criteria for identifying till genesis in the geological record. What should be called till' Based on the author's extensive field research, as well as the latest literature on the subject, this book attempts to provide a definitive answer to that question. It critically reviews the global till literature and experimental and laboratory-based assessments of subglacial processes, as well as the theoretical constructs that have emerged from process sedimentology over the past century. Drawing on a wide range of knowledge bases, David Evans develops a more precise, contemporary till nomenclature and new investigatory strategies for understanding a critical aspect of glacial process sedimentology. -Provides an in-depth discussion of subglacial sedimentary processes, with an emphasis on the origins of till matrix and terminal grade and the latest observations on till evolution -Describes contemporary laboratory and modelling experiments on till evolution and techniques for measuring strain signatures in glacial deposits -Develops an updated till nomenclature based on an array of knowledge bases and describes new strategies for field description and analysis of glacial diamictons Written by an internationally recognised expert in the field, this book represents an important step forward in the modern understanding of glacial process sedimentology. As such, Till: A Glacial Process Sedimentology is an indispensable resource for advanced undergraduates and researchers in sedimentology, glacier science and related areas.

Download or read book Grain Shape Variation and Sedimentary Processes of the Neogene Quaternary Sediments in Baffin Bay and Labrador Sea written by Yongtang Shan and published by . This book was released on 1989 with total page 146 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Provenance Paleogeography and Mass movement of Deep water Depositional Systems in Arc adjacent Basins written by Glenn Russell Sharman and published by . This book was released on 2014 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Plate convergence and associated subduction result in a dynamic setting where the development and evolution of sedimentary systems are influenced by a variety of autogenic and allogenic processes. Correspondingly, patterns of sedimentation within basins that form trench-ward of magmatic arcs (i.e., forearc basins) are often complex as a result of the interplay between interrelated factors that include: (1) magmatism and orogenesis in the hinterland, (2) changes in subduction regime (e.g., steep versus shallow angle of plate descent), and (3) local basin deformation. This dissertation examines the tectonic and sedimentary processes that acted in concert to influence the evolution of two arc-adjacent sedimentary systems: the Late Cretaceous-Eocene California forearc (Chapters 1 and 2) and the late Miocene Taranaki Basin, New Zealand (Chapter 3). These three chapters include investigation of a variety of processes that occur at different temporal and spatial scales. Specifically, major themes of this dissertation include (1) the evolution of sediment dispersal patterns in response to changes in continental arc magmatism and subduction regime (Chapter 1), (2) the development and early history of the central San Andreas fault system and the paleogeographic setting of central California (Chapter 2), and (3) submarine mass-movement and patterns of soft-sediment deformation within a basin-floor sedimentary succession (Chapter 3). The data types and methods used in each chapter are diverse and include detrital zircon U-Pb geochronology, subsurface datasets (e.g., well logs and seismic-reflection data), outcrop description, and structural analysis.

Download or read book Canadian Journal of Earth Sciences written by and published by . This book was released on 2011 with total page 264 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Glacial Sedimentary Processes and Products written by and published by . This book was released on 2007 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Report of Activities for the Stratigraphic and Tectonic Framework for the Baffin Bay Petroleum Systems 2017 Offshore Labrador and Offshore Nunavut written by and published by . This book was released on 2017 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Offshore of Baffin Island, deep below the seafloor of Baffin Bay, there are sedimentary basins with as yet unknown potential for viable petroleum resources. As part of the GEM-2 Baffin Project, the desktop activity Stratigraphic and Tectonic Framework for the Baffin Bay Petroleum Systems aims to provide an understanding of the geological history and plate tectonic evolution of the sedimentary basins and the factors that control the petroleum resource potential. To help further understand basin distribution, the potential for deeply buried rocks, and the changing nature of the rifted margin of Baffin Bay, we are using the Labrador Sea margin to the south as an analogue. This area evolved contemporaneously with Baffin Bay and underwent similar geological processes. The Labrador offshore margin has been more thoroughly sampled by industry wells and modern seismic data and allows us to develop analogues for the crustal structure, nature of sedimentary basin fill, and characteristics of pre-rift Paleozoic basins. Additionally, the intervening Davis Strait region forms an important zone of strike-slip deformation with extensive volcanics, major structural highs, and large Paleozoic basins that contribute to factors influencing the petroleum system of that region. By integrating these studies with other GEM-2 Baffin activities, we can build an integrated tectonic and stratigraphic framework to better understand the timing of the key geologic elements required to produce a complete petroleum system in the Baffin Bay region: source rocks, reservoir, seal, and migration pathways"--Project Summary, p. 3.

Download or read book Quaternary Dating Methods written by Mike Walker and published by John Wiley & Sons. This book was released on 2013-04-30 with total page 311 pages. Available in PDF, EPUB and Kindle. Book excerpt: This introductory textbook introduces the basics of dating, the range of techniques available and the strengths and limitations of each of the principal methods. Coverage includes: the concept of time in Quaternary Science and related fields the history of dating from lithostratigraphy and biostratigraphy the development and application of radiometric methods different methods in dating: radiometric dating, incremental dating, relative dating and age equivalence Presented in a clear and straightforward manner with the minimum of technical detail, this text is a great introduction for both students and practitioners in the Earth, Environmental and Archaeological Sciences. Praise from the reviews: "This book is a must for any Quaternary scientist." SOUTH AFRICAN GEOGRAPHICAL JOURNAL, September 2006 “...very well organized, clearly and straightforwardly written and provides a good overview on the wide field of Quaternary dating methods...” JOURNAL OF QUATERNARY SCIENCE, January 2007

Download or read book Global Change in the Holocene written by John Birks and published by Routledge. This book was released on 2014-02-24 with total page 556 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Holocene spans the 11,500 years since the end of the last Ice Age and has been a period of major global environmental change. However the rate of change has accelerated during the last hundred years, due largely to human impacts and this has led to a growing concern for the future of our environmental resources. Global Change in the Holocene demonstrates how reconstructing the record of past environmental change can provide us with essential knowledge about how our environment works and presents the reader with an informed viewpoint from which to project realistic future scenarios. The book brings together key techniques that are widely used in Holocene research, such as radiocarbon dating, dendrochronology and sediment analysis and offers a comprehensive analysis of various archives of environmental change including instrumental and documentary records, corals, lake sediments, glaciers and ice cores. This reference will be an informative and cutting-edge resource for all researchers in the fields of climate change, environmental science, geography, palaeoecology and archaeology.

Download or read book Critical Zones written by Bruno Latour and published by MIT Press. This book was released on 2020-10-13 with total page 473 pages. Available in PDF, EPUB and Kindle. Book excerpt: Artists and writers portray the disorientation of a world facing climate change. This monumental volume, drawn from a 2020 exhibition at the ZKM Center for Art and Media, portrays the disorientation of life in world facing climate change. It traces this disorientation to the disconnection between two different definitions of the land on which modernizing humans live: the sovereign nation from which they derive their rights, and another one, hidden, from which they gain their wealth—the land they live on, and the land they live from. Charting the land they will inhabit, they find not a globe, not the iconic “blue marble,” but a series of critical zones—patchy, heterogenous, discontinuous. With short pieces, longer essays, and more than 500 illustrations, the contributors explore the new landscape on which it may be possible for humans to land—what it means to be “on Earth,” whether the critical zone, the Gaia, or the terrestrial. They consider geopolitical conflicts and tools redesigned for the new “geopolitics of life forms.” The “thought exhibition” described in this book can opens a fictional space to explore the new climate regime; the rest of the story is unknown. Contributors include Dipesh Chakrabarty, Pierre Charbonnier, Emanuele Coccia, Vinciane Despret, Jerôme Gaillarde, Donna Haraway, Joseph Leo Koerner, Timothy Lenton, Richard Powers, Simon Schaffer, Isabelle Stengers, Bronislaw Szerszynski, Jan A. Zalasiewicz, Siegfried Zielinski Copublished with ZKM | Center for Art and Media Karlsruhe

Download or read book The Organic Carbon Cycle in the Arctic Ocean written by Rüdiger Stein and published by Springer Science & Business Media. This book was released on 2011-06-27 with total page 394 pages. Available in PDF, EPUB and Kindle. Book excerpt: The flux, preservation, and accumulation of organic carbon in marine systems are controlled by various mechanisms including primary p- duction of the surface water, supply of terrigenous organic matter from the surrounding continents, biogeochemical processes in the water column and at the seafloor, and sedimentation rate. For the world's oceans, phytoplankton productivity is by far the largest organic carbon 9 source, estimated to be about 30 to 50 Gt (10 tonnes) per year (Berger et al. 1989; Hedges and Keil 1995). By comparison, rivers contribute -1 about 0. 15 to 0. 23 Gt y of particulate organi.